1433 lines
37 KiB
C#
1433 lines
37 KiB
C#
//
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// System.Data.SqlClient.SqlDataReader.cs
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//
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// Author:
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// Rodrigo Moya (rodrigo@ximian.com)
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// Daniel Morgan (danmorg@sc.rr.com)
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// Tim Coleman (tim@timcoleman.com)
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//
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// (C) Ximian, Inc 2002
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// (C) Daniel Morgan 2002
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// Copyright (C) Tim Coleman, 2002
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//
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//
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// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using Mono.Data.Tds.Protocol;
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using System;
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using System.IO;
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using System.Text;
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using System.Collections;
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using System.ComponentModel;
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using System.Data;
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using System.Data.Common;
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using System.Data.SqlTypes;
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using System.Globalization;
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using System.Xml;
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namespace System.Data.SqlClient
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{
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public class SqlDataReader : DbDataReader, IDataReader, IDisposable, IDataRecord
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{
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#region Fields
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SqlCommand command;
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bool disposed;
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bool isClosed;
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bool moreResults;
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int resultsRead;
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int rowsRead;
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DataTable schemaTable;
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bool haveRead;
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bool readResult;
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bool readResultUsed;
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int visibleFieldCount;
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#endregion // Fields
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const int COLUMN_NAME_IDX = 0;
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const int COLUMN_ORDINAL_IDX = 1;
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const int COLUMN_SIZE_IDX = 2;
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const int NUMERIC_PRECISION_IDX = 3;
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const int NUMERIC_SCALE_IDX = 4;
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const int IS_UNIQUE_IDX = 5;
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const int IS_KEY_IDX = 6;
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const int BASE_SERVER_NAME_IDX = 7;
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const int BASE_CATALOG_NAME_IDX = 8;
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const int BASE_COLUMN_NAME_IDX = 9;
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const int BASE_SCHEMA_NAME_IDX = 10;
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const int BASE_TABLE_NAME_IDX = 11;
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const int DATA_TYPE_IDX = 12;
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const int ALLOW_DBNULL_IDX = 13;
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const int PROVIDER_TYPE_IDX = 14;
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const int IS_ALIASED_IDX = 15;
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const int IS_EXPRESSION_IDX = 16;
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const int IS_IDENTITY_IDX = 17;
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const int IS_AUTO_INCREMENT_IDX = 18;
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const int IS_ROW_VERSION_IDX = 19;
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const int IS_HIDDEN_IDX = 20;
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const int IS_LONG_IDX = 21;
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const int IS_READ_ONLY_IDX = 22;
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const int PROVIDER_SPECIFIC_TYPE_IDX = 23;
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const int DATA_TYPE_NAME_IDX = 24;
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const int XML_SCHEMA_COLLCTN_DB_IDX = 25;
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const int XML_SCHEMA_COLLCTN_OWN_SCHEMA_IDX = 26;
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const int XML_SCHEMA_COLLCTN_NAME_IDX = 27;
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const int UDT_ASMBLY_QUALIFIED_NAME_IDX = 28;
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const int NON_VER_PROVIDER_TYPE_IDX = 29;
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const int IS_COLUMN_SET = 30;
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#region Constructors
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internal SqlDataReader (SqlCommand command)
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{
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this.command = command;
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command.Tds.RecordsAffected = -1;
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NextResult ();
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}
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#endregion // Constructors
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#region Properties
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public
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override
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int Depth {
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get { return 0; }
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}
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public
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override
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int FieldCount {
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get {
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ValidateState ();
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return command.Tds.Columns.Count;
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}
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}
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public
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override
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bool IsClosed {
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get { return isClosed; }
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}
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public
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override
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object this [int i] {
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get { return GetValue (i); }
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}
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public
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override
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object this [string name] {
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get { return GetValue (GetOrdinal (name)); }
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}
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public
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override
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int RecordsAffected {
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get {
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return command.Tds.RecordsAffected;
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}
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}
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public
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override
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bool HasRows {
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get {
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ValidateState ();
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if (rowsRead > 0)
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return true;
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if (!haveRead)
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readResult = ReadRecord ();
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return readResult;
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}
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}
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public override int VisibleFieldCount {
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get { return visibleFieldCount; }
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}
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protected SqlConnection Connection {
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get { return command.Connection; }
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}
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protected bool IsCommandBehavior (CommandBehavior condition) {
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return condition == command.CommandBehavior;
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}
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#endregion // Properties
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#region Methods
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public
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override
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void Close ()
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{
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if (IsClosed)
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return;
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// skip to end & read output parameters.
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while (NextResult ())
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;
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isClosed = true;
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command.CloseDataReader ();
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}
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private static DataTable ConstructSchemaTable ()
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{
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Type booleanType = typeof (bool);
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Type stringType = typeof (string);
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Type intType = typeof (int);
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Type typeType = typeof (Type);
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Type shortType = typeof (short);
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DataTable schemaTable = new DataTable ("SchemaTable");
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schemaTable.Columns.Add ("ColumnName", stringType);
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schemaTable.Columns.Add ("ColumnOrdinal", intType);
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schemaTable.Columns.Add ("ColumnSize", intType);
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schemaTable.Columns.Add ("NumericPrecision", shortType);
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schemaTable.Columns.Add ("NumericScale", shortType);
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schemaTable.Columns.Add ("IsUnique", booleanType);
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schemaTable.Columns.Add ("IsKey", booleanType);
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schemaTable.Columns.Add ("BaseServerName", stringType);
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schemaTable.Columns.Add ("BaseCatalogName", stringType);
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schemaTable.Columns.Add ("BaseColumnName", stringType);
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schemaTable.Columns.Add ("BaseSchemaName", stringType);
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schemaTable.Columns.Add ("BaseTableName", stringType);
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schemaTable.Columns.Add ("DataType", typeType);
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schemaTable.Columns.Add ("AllowDBNull", booleanType);
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schemaTable.Columns.Add ("ProviderType", intType);
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schemaTable.Columns.Add ("IsAliased", booleanType);
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schemaTable.Columns.Add ("IsExpression", booleanType);
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schemaTable.Columns.Add ("IsIdentity", booleanType);
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schemaTable.Columns.Add ("IsAutoIncrement", booleanType);
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schemaTable.Columns.Add ("IsRowVersion", booleanType);
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schemaTable.Columns.Add ("IsHidden", booleanType);
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schemaTable.Columns.Add ("IsLong", booleanType);
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schemaTable.Columns.Add ("IsReadOnly", booleanType);
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schemaTable.Columns.Add ("ProviderSpecificDataType", typeType);
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schemaTable.Columns.Add ("DataTypeName", stringType);
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schemaTable.Columns.Add ("XmlSchemaCollectionDatabase", stringType);
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schemaTable.Columns.Add ("XmlSchemaCollectionOwningSchema", stringType);
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schemaTable.Columns.Add ("XmlSchemaCollectionName", stringType);
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schemaTable.Columns.Add ("UdtAssemblyQualifiedName", stringType);
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schemaTable.Columns.Add ("NonVersionedProviderType", intType);
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schemaTable.Columns.Add ("IsColumnSet", booleanType);
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return schemaTable;
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}
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private string GetSchemaRowTypeName (TdsColumnType ctype, int csize, short precision, short scale)
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{
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int dbType;
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bool isLong;
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Type fieldType;
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string typeName;
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GetSchemaRowType (ctype, csize, precision, scale,
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out dbType, out fieldType, out isLong,
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out typeName);
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return typeName;
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}
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private Type GetSchemaRowFieldType (TdsColumnType ctype, int csize, short precision, short scale)
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{
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int dbType;
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bool isLong;
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Type fieldType;
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string typeName;
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GetSchemaRowType (ctype, csize, precision, scale,
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out dbType, out fieldType, out isLong,
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out typeName);
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return fieldType;
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}
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SqlDbType GetSchemaRowDbType (int ordinal)
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{
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int csize;
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short precision, scale;
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TdsColumnType ctype;
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TdsDataColumn column;
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if (ordinal < 0 || ordinal >= command.Tds.Columns.Count)
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throw new IndexOutOfRangeException ();
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column = command.Tds.Columns [ordinal];
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ctype = (TdsColumnType) column.ColumnType;
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csize = (int) column.ColumnSize;
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precision = (short) (column.NumericPrecision ?? 0);
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scale = (short) (column.NumericScale ?? 0);
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return GetSchemaRowDbType (ctype, csize, precision, scale);
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}
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private SqlDbType GetSchemaRowDbType (TdsColumnType ctype, int csize, short precision, short scale)
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{
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Type fieldType;
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bool isLong;
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string typeName;
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int dbType;
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GetSchemaRowType (ctype, csize, precision, scale,
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out dbType, out fieldType, out isLong,
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out typeName);
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return (SqlDbType) dbType;
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}
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private void GetSchemaRowType (TdsColumnType ctype, int csize,
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short precision, short scale,
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out int dbType, out Type fieldType,
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out bool isLong, out string typeName)
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{
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dbType = -1;
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typeName = string.Empty;
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isLong = false;
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fieldType = typeof (Type);
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switch (ctype) {
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case TdsColumnType.Int1:
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case TdsColumnType.Int2:
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case TdsColumnType.Int4:
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case TdsColumnType.IntN:
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case TdsColumnType.BigInt:
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switch (csize) {
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case 1:
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typeName = "tinyint";
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dbType = (int) SqlDbType.TinyInt;
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fieldType = typeof (byte);
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isLong = false;
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break;
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case 2:
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typeName = "smallint";
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dbType = (int) SqlDbType.SmallInt;
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fieldType = typeof (short);
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isLong = false;
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break;
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case 4:
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typeName = "int";
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dbType = (int) SqlDbType.Int;
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fieldType = typeof (int);
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isLong = false;
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break;
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case 8:
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typeName = "bigint";
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dbType = (int) SqlDbType.BigInt;
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fieldType = typeof (long);
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isLong = false;
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break;
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}
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break;
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case TdsColumnType.Real:
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case TdsColumnType.Float8:
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case TdsColumnType.FloatN:
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switch (csize) {
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case 4:
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typeName = "real";
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dbType = (int) SqlDbType.Real;
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fieldType = typeof (float);
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isLong = false;
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break;
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case 8:
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typeName = "float";
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dbType = (int) SqlDbType.Float;
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fieldType = typeof (double);
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isLong = false;
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break;
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}
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break;
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case TdsColumnType.Image :
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typeName = "image";
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dbType = (int) SqlDbType.Image;
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fieldType = typeof (byte[]);
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isLong = true;
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break;
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case TdsColumnType.Text :
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typeName = "text";
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dbType = (int) SqlDbType.Text;
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fieldType = typeof (string);
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isLong = true;
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break;
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case TdsColumnType.UniqueIdentifier :
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typeName = "uniqueidentifier";
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dbType = (int) SqlDbType.UniqueIdentifier;
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fieldType = typeof (Guid);
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isLong = false;
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break;
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case TdsColumnType.VarBinary :
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case TdsColumnType.BigVarBinary :
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typeName = "varbinary";
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dbType = (int) SqlDbType.VarBinary;
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fieldType = typeof (byte[]);
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isLong = false;
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break;
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case TdsColumnType.VarChar :
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case TdsColumnType.BigVarChar :
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typeName = "varchar";
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dbType = (int) SqlDbType.VarChar;
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fieldType = typeof (string);
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isLong = false;
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break;
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case TdsColumnType.Binary :
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case TdsColumnType.BigBinary :
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typeName = "binary";
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dbType = (int) SqlDbType.Binary;
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fieldType = typeof (byte[]);
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isLong = false;
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break;
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case TdsColumnType.Char :
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case TdsColumnType.BigChar :
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typeName = "char";
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dbType = (int) SqlDbType.Char;
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fieldType = typeof (string);
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isLong = false;
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break;
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case TdsColumnType.Bit :
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case TdsColumnType.BitN :
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typeName = "bit";
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dbType = (int) SqlDbType.Bit;
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fieldType = typeof (bool);
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isLong = false;
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break;
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case TdsColumnType.DateTime4 :
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case TdsColumnType.DateTime :
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case TdsColumnType.DateTimeN :
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switch (csize) {
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case 4:
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typeName = "smalldatetime";
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dbType = (int) SqlDbType.SmallDateTime;
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fieldType = typeof (DateTime);
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isLong = false;
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break;
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case 8:
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typeName = "datetime";
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dbType = (int) SqlDbType.DateTime;
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fieldType = typeof (DateTime);
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isLong = false;
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break;
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}
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break;
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case TdsColumnType.Money :
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case TdsColumnType.MoneyN :
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case TdsColumnType.Money4 :
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switch (csize) {
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case 4:
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typeName = "smallmoney";
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dbType = (int) SqlDbType.SmallMoney;
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fieldType = typeof (decimal);
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isLong = false;
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break;
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case 8:
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typeName = "money";
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dbType = (int) SqlDbType.Money;
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fieldType = typeof (decimal);
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isLong = false;
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break;
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}
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break;
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case TdsColumnType.NText :
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typeName = "ntext";
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dbType = (int) SqlDbType.NText;
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fieldType = typeof (string);
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isLong = true;
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break;
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case TdsColumnType.NVarChar :
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typeName = "nvarchar";
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dbType = (int) SqlDbType.NVarChar;
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fieldType = typeof (string);
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isLong = false;
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break;
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case TdsColumnType.Decimal :
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case TdsColumnType.Numeric :
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// TDS 7.0 returns bigint as decimal(19,0)
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if (precision == 19 && scale == 0) {
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typeName = "bigint";
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dbType = (int) SqlDbType.BigInt;
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fieldType = typeof (long);
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} else {
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typeName = "decimal";
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dbType = (int) SqlDbType.Decimal;
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fieldType = typeof (decimal);
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}
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isLong = false;
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break;
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case TdsColumnType.NChar :
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typeName = "nchar";
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dbType = (int) SqlDbType.NChar;
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fieldType = typeof (string);
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isLong = false;
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break;
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case TdsColumnType.SmallMoney :
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typeName = "smallmoney";
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dbType = (int) SqlDbType.SmallMoney;
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fieldType = typeof (decimal);
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isLong = false;
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break;
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default :
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typeName = "variant";
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dbType = (int) SqlDbType.Variant;
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fieldType = typeof (object);
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isLong = false;
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break;
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}
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}
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new
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void Dispose (bool disposing)
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{
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if (!disposed) {
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if (disposing) {
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if (schemaTable != null)
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schemaTable.Dispose ();
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Close ();
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command = null;
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}
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disposed = true;
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}
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}
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public
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override
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bool GetBoolean (int i)
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{
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object value = GetValue (i);
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if (!(value is bool)) {
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if (value is DBNull) throw new SqlNullValueException ();
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throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
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}
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return (bool) value;
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}
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public
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override
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byte GetByte (int i)
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{
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object value = GetValue (i);
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if (!(value is byte)) {
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if (value is DBNull) throw new SqlNullValueException ();
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throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
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}
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return (byte) value;
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}
|
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|
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public
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override
|
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long GetBytes (int i, long dataIndex, byte[] buffer, int bufferIndex, int length)
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{
|
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if ((command.CommandBehavior & CommandBehavior.SequentialAccess) != 0) {
|
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ValidateState ();
|
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EnsureDataAvailable ();
|
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try {
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long len = ((Tds)command.Tds).GetSequentialColumnValue (i, dataIndex, buffer, bufferIndex, length);
|
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if (len == -1)
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throw CreateGetBytesOnInvalidColumnTypeException (i);
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if (len == -2)
|
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throw new SqlNullValueException ();
|
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return len;
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} catch (TdsInternalException ex) {
|
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command.Connection.Close ();
|
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throw SqlException.FromTdsInternalException ((TdsInternalException) ex);
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}
|
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}
|
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|
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object value = GetValue (i);
|
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if (!(value is byte [])) {
|
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SqlDbType type = GetSchemaRowDbType (i);
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switch (type) {
|
|
case SqlDbType.Image:
|
|
if (value is DBNull)
|
|
throw new SqlNullValueException ();
|
|
break;
|
|
case SqlDbType.Text:
|
|
string text = value as string;
|
|
if (text != null)
|
|
value = Encoding.Default.GetBytes (text);
|
|
else
|
|
value = null;
|
|
break;
|
|
case SqlDbType.NText:
|
|
string ntext = value as string;
|
|
if (ntext != null)
|
|
value = Encoding.Unicode.GetBytes (ntext);
|
|
else
|
|
value = null;
|
|
break;
|
|
default:
|
|
throw CreateGetBytesOnInvalidColumnTypeException (i);
|
|
}
|
|
}
|
|
|
|
if (buffer == null)
|
|
return ((byte []) value).Length; // Return length of data
|
|
|
|
// Copy data into buffer
|
|
int availLen = (int) ( ( (byte []) value).Length - dataIndex);
|
|
if (availLen < length)
|
|
length = availLen;
|
|
if (dataIndex < 0)
|
|
return 0;
|
|
|
|
Array.Copy ((byte []) value, (int) dataIndex, buffer, bufferIndex, length);
|
|
return length; // return actual read count
|
|
}
|
|
|
|
[EditorBrowsableAttribute (EditorBrowsableState.Never)]
|
|
public
|
|
override
|
|
char GetChar (int i)
|
|
{
|
|
throw new NotSupportedException ();
|
|
}
|
|
|
|
public
|
|
override
|
|
long GetChars (int i, long dataIndex, char[] buffer, int bufferIndex, int length)
|
|
{
|
|
if ((command.CommandBehavior & CommandBehavior.SequentialAccess) != 0) {
|
|
ValidateState ();
|
|
EnsureDataAvailable ();
|
|
|
|
if (i < 0 || i >= command.Tds.Columns.Count)
|
|
throw new IndexOutOfRangeException ();
|
|
|
|
Encoding encoding = null;
|
|
byte mul = 1;
|
|
TdsColumnType colType = (TdsColumnType) command.Tds.Columns[i]["ColumnType"];
|
|
switch (colType) {
|
|
case TdsColumnType.Text :
|
|
case TdsColumnType.VarChar:
|
|
case TdsColumnType.Char:
|
|
case TdsColumnType.BigVarChar:
|
|
encoding = Encoding.ASCII;
|
|
break;
|
|
case TdsColumnType.NText :
|
|
case TdsColumnType.NVarChar:
|
|
case TdsColumnType.NChar:
|
|
encoding = Encoding.Unicode;
|
|
mul = 2;
|
|
break;
|
|
default :
|
|
return -1;
|
|
}
|
|
|
|
long count = 0;
|
|
if (buffer == null) {
|
|
count = GetBytes (i,0,(byte[]) null,0,0);
|
|
return (count/mul);
|
|
}
|
|
|
|
length *= mul;
|
|
byte[] arr = new byte [length];
|
|
count = GetBytes (i, dataIndex, arr, 0, length);
|
|
if (count == -1)
|
|
throw new InvalidCastException ("Specified cast is not valid");
|
|
|
|
Char[] val = encoding.GetChars (arr, 0, (int)count);
|
|
val.CopyTo (buffer, bufferIndex);
|
|
return val.Length;
|
|
}
|
|
|
|
char [] valueBuffer;
|
|
object value = GetValue (i);
|
|
|
|
if (value is char[])
|
|
valueBuffer = (char[])value;
|
|
else if (value is string)
|
|
valueBuffer = ((string)value).ToCharArray();
|
|
else {
|
|
if (value is DBNull) throw new SqlNullValueException ();
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
}
|
|
|
|
if ( buffer == null ) {
|
|
// Return length of data
|
|
return valueBuffer.Length;
|
|
}
|
|
else {
|
|
// Copy data into buffer
|
|
Array.Copy (valueBuffer, (int) dataIndex, buffer, bufferIndex, length);
|
|
return valueBuffer.Length - dataIndex;
|
|
}
|
|
}
|
|
|
|
|
|
public
|
|
override
|
|
string GetDataTypeName (int i)
|
|
{
|
|
TdsDataColumn column;
|
|
TdsColumnType ctype;
|
|
int csize;
|
|
short precision;
|
|
short scale;
|
|
|
|
ValidateState ();
|
|
|
|
if (i < 0 || i >= command.Tds.Columns.Count)
|
|
throw new IndexOutOfRangeException ();
|
|
|
|
column = command.Tds.Columns [i];
|
|
ctype = (TdsColumnType) column.ColumnType;
|
|
csize = (int) column.ColumnSize;
|
|
precision = (short) (column.NumericPrecision ?? 0);
|
|
scale = (short) (column.NumericScale ?? 0);
|
|
return GetSchemaRowTypeName (ctype, csize, precision, scale);
|
|
}
|
|
|
|
public
|
|
override
|
|
DateTime GetDateTime (int i)
|
|
{
|
|
object value = GetValue (i);
|
|
if (!(value is DateTime)) {
|
|
if (value is DBNull) throw new SqlNullValueException ();
|
|
else throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
}
|
|
return (DateTime) value;
|
|
}
|
|
|
|
[MonoTODO]
|
|
public virtual DateTimeOffset GetDateTimeOffset (int i)
|
|
{
|
|
throw new NotImplementedException ();
|
|
}
|
|
|
|
[MonoTODO]
|
|
public virtual TimeSpan GetTimeSpan (int i)
|
|
{
|
|
throw new NotImplementedException ();
|
|
}
|
|
|
|
[MonoTODO]
|
|
public virtual SqlChars GetSqlChars (int i)
|
|
{
|
|
throw new NotImplementedException ();
|
|
}
|
|
|
|
public
|
|
override
|
|
decimal GetDecimal (int i)
|
|
{
|
|
object value = GetValue (i);
|
|
if (!(value is decimal)) {
|
|
if (value is DBNull) throw new SqlNullValueException ();
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
}
|
|
return (decimal) value;
|
|
}
|
|
|
|
public
|
|
override
|
|
double GetDouble (int i)
|
|
{
|
|
object value = GetValue (i);
|
|
if (!(value is double)) {
|
|
if (value is DBNull) throw new SqlNullValueException ();
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
}
|
|
return (double) value;
|
|
}
|
|
|
|
public
|
|
override
|
|
Type GetFieldType (int i)
|
|
{
|
|
TdsDataColumn column;
|
|
TdsColumnType ctype;
|
|
int csize;
|
|
short precision;
|
|
short scale;
|
|
|
|
ValidateState ();
|
|
|
|
if (i < 0 || i >= command.Tds.Columns.Count)
|
|
throw new IndexOutOfRangeException ();
|
|
|
|
column = command.Tds.Columns [i];
|
|
ctype = (TdsColumnType) column.ColumnType;
|
|
csize = (int) column.ColumnSize;
|
|
precision = (short) (column.NumericPrecision ?? 0);
|
|
scale = (short) (column.NumericScale ?? 0);
|
|
return GetSchemaRowFieldType (ctype, csize, precision,
|
|
scale);
|
|
}
|
|
|
|
public
|
|
override
|
|
float GetFloat (int i)
|
|
{
|
|
object value = GetValue (i);
|
|
if (!(value is float)) {
|
|
if (value is DBNull) throw new SqlNullValueException ();
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
}
|
|
return (float) value;
|
|
}
|
|
|
|
public
|
|
override
|
|
Guid GetGuid (int i)
|
|
{
|
|
object value = GetValue (i);
|
|
if (!(value is Guid)) {
|
|
if (value is DBNull) throw new SqlNullValueException ();
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
}
|
|
return (Guid) value;
|
|
}
|
|
|
|
public
|
|
override
|
|
short GetInt16 (int i)
|
|
{
|
|
object value = GetValue (i);
|
|
if (!(value is short)) {
|
|
if (value is DBNull) throw new SqlNullValueException ();
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
}
|
|
return (short) value;
|
|
}
|
|
|
|
public
|
|
override
|
|
int GetInt32 (int i)
|
|
{
|
|
object value = GetValue (i);
|
|
if (!(value is int)) {
|
|
if (value is DBNull) throw new SqlNullValueException ();
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
}
|
|
return (int) value;
|
|
}
|
|
|
|
public
|
|
override
|
|
long GetInt64 (int i)
|
|
{
|
|
object value = GetValue (i);
|
|
if (!(value is long)) {
|
|
if (value is DBNull) throw new SqlNullValueException ();
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
}
|
|
return (long) value;
|
|
}
|
|
|
|
public
|
|
override
|
|
string GetName (int i)
|
|
{
|
|
ValidateState ();
|
|
|
|
if (i < 0 || i >= command.Tds.Columns.Count)
|
|
throw new IndexOutOfRangeException ();
|
|
return (string) command.Tds.Columns[i].ColumnName;
|
|
}
|
|
|
|
public
|
|
override
|
|
int GetOrdinal (string name)
|
|
{
|
|
ValidateState ();
|
|
|
|
if (name == null)
|
|
throw new ArgumentNullException ("fieldName");
|
|
|
|
string colName;
|
|
foreach (TdsDataColumn schema in command.Tds.Columns) {
|
|
colName = schema.ColumnName;
|
|
if (colName.Equals (name) || String.Compare (colName, name, true) == 0)
|
|
return (int) schema.ColumnOrdinal;
|
|
}
|
|
throw new IndexOutOfRangeException ();
|
|
}
|
|
|
|
public
|
|
override
|
|
DataTable GetSchemaTable ()
|
|
{
|
|
ValidateState ();
|
|
|
|
if (schemaTable == null)
|
|
schemaTable = ConstructSchemaTable ();
|
|
|
|
if (schemaTable.Rows != null && schemaTable.Rows.Count > 0)
|
|
return schemaTable;
|
|
|
|
if (!moreResults)
|
|
return null;
|
|
|
|
foreach (TdsDataColumn schema in command.Tds.Columns) {
|
|
DataRow row = schemaTable.NewRow ();
|
|
|
|
row [COLUMN_NAME_IDX] = GetSchemaValue (schema.ColumnName);
|
|
row [COLUMN_ORDINAL_IDX] = GetSchemaValue (schema.ColumnOrdinal);
|
|
row [IS_UNIQUE_IDX] = GetSchemaValue (schema.IsUnique);
|
|
row [IS_AUTO_INCREMENT_IDX] = GetSchemaValue (schema.IsAutoIncrement);
|
|
row [IS_ROW_VERSION_IDX] = GetSchemaValue (schema.IsRowVersion);
|
|
row [IS_HIDDEN_IDX] = GetSchemaValue (schema.IsHidden);
|
|
row [IS_IDENTITY_IDX] = GetSchemaValue (schema.IsIdentity);
|
|
row [NUMERIC_PRECISION_IDX] = GetSchemaValue (schema.NumericPrecision);
|
|
row [IS_KEY_IDX] = GetSchemaValue (schema.IsKey);
|
|
row [IS_ALIASED_IDX] = GetSchemaValue (schema.IsAliased);
|
|
row [IS_EXPRESSION_IDX] = GetSchemaValue (schema.IsExpression);
|
|
row [IS_READ_ONLY_IDX] = GetSchemaValue (schema.IsReadOnly);
|
|
row [BASE_SERVER_NAME_IDX] = GetSchemaValue (schema.BaseServerName);
|
|
row [BASE_CATALOG_NAME_IDX] = GetSchemaValue (schema.BaseCatalogName);
|
|
row [BASE_COLUMN_NAME_IDX] = GetSchemaValue (schema.BaseColumnName);
|
|
row [BASE_SCHEMA_NAME_IDX] = GetSchemaValue (schema.BaseSchemaName);
|
|
row [BASE_TABLE_NAME_IDX] = GetSchemaValue (schema.BaseTableName);
|
|
row [ALLOW_DBNULL_IDX] = GetSchemaValue (schema.AllowDBNull);
|
|
row [PROVIDER_SPECIFIC_TYPE_IDX] = DBNull.Value;
|
|
row [DATA_TYPE_NAME_IDX] = GetSchemaValue (schema.DataTypeName);
|
|
row [XML_SCHEMA_COLLCTN_DB_IDX] = DBNull.Value;
|
|
row [XML_SCHEMA_COLLCTN_OWN_SCHEMA_IDX] = DBNull.Value;
|
|
row [XML_SCHEMA_COLLCTN_NAME_IDX] = DBNull.Value;
|
|
row [UDT_ASMBLY_QUALIFIED_NAME_IDX] = DBNull.Value;
|
|
row [NON_VER_PROVIDER_TYPE_IDX] = DBNull.Value;
|
|
row [IS_COLUMN_SET] = DBNull.Value;
|
|
// We don't always get the base column name.
|
|
if (row [BASE_COLUMN_NAME_IDX] == DBNull.Value)
|
|
row [BASE_COLUMN_NAME_IDX] = row [COLUMN_NAME_IDX];
|
|
|
|
TdsColumnType ctype;
|
|
int csize, dbType;
|
|
Type fieldType;
|
|
bool isLong;
|
|
string typeName;
|
|
short precision;
|
|
short scale;
|
|
ctype = (TdsColumnType) schema.ColumnType;
|
|
csize = (int) schema.ColumnSize;
|
|
precision = (short) GetSchemaValue (schema.NumericPrecision);
|
|
scale = (short) GetSchemaValue (schema.NumericScale);
|
|
|
|
GetSchemaRowType (ctype, csize, precision, scale,
|
|
out dbType, out fieldType, out isLong,
|
|
out typeName);
|
|
|
|
row [COLUMN_SIZE_IDX] = csize;
|
|
row [NUMERIC_PRECISION_IDX] = precision;
|
|
row [NUMERIC_SCALE_IDX] = scale;
|
|
row [PROVIDER_TYPE_IDX] = dbType;
|
|
row [DATA_TYPE_IDX] = fieldType;
|
|
row [IS_LONG_IDX] = isLong;
|
|
if ((bool)row [IS_HIDDEN_IDX] == false)
|
|
visibleFieldCount += 1;
|
|
|
|
schemaTable.Rows.Add (row);
|
|
}
|
|
return schemaTable;
|
|
}
|
|
|
|
private static object GetSchemaValue (TdsDataColumn schema, string key)
|
|
{
|
|
object val = schema [key];
|
|
if (val != null)
|
|
return val;
|
|
else
|
|
return DBNull.Value;
|
|
}
|
|
|
|
static object GetSchemaValue (object value)
|
|
{
|
|
if (value == null)
|
|
return DBNull.Value;
|
|
|
|
return value;
|
|
}
|
|
|
|
public
|
|
virtual
|
|
SqlBinary GetSqlBinary (int i)
|
|
{
|
|
object value = GetSqlValue (i);
|
|
if (!(value is SqlBinary))
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
return (SqlBinary) value;
|
|
}
|
|
|
|
public
|
|
virtual
|
|
SqlBoolean GetSqlBoolean (int i)
|
|
{
|
|
object value = GetSqlValue (i);
|
|
if (!(value is SqlBoolean))
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
return (SqlBoolean) value;
|
|
}
|
|
|
|
public
|
|
virtual
|
|
SqlByte GetSqlByte (int i)
|
|
{
|
|
object value = GetSqlValue (i);
|
|
if (!(value is SqlByte))
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
return (SqlByte) value;
|
|
}
|
|
|
|
public
|
|
virtual
|
|
SqlDateTime GetSqlDateTime (int i)
|
|
{
|
|
object value = GetSqlValue (i);
|
|
if (!(value is SqlDateTime))
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
return (SqlDateTime) value;
|
|
}
|
|
|
|
public
|
|
virtual
|
|
SqlDecimal GetSqlDecimal (int i)
|
|
{
|
|
object value = GetSqlValue (i);
|
|
if (!(value is SqlDecimal))
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
return (SqlDecimal) value;
|
|
}
|
|
|
|
public
|
|
virtual
|
|
SqlDouble GetSqlDouble (int i)
|
|
{
|
|
object value = GetSqlValue (i);
|
|
if (!(value is SqlDouble))
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
return (SqlDouble) value;
|
|
}
|
|
|
|
public
|
|
virtual
|
|
SqlGuid GetSqlGuid (int i)
|
|
{
|
|
object value = GetSqlValue (i);
|
|
if (!(value is SqlGuid))
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
return (SqlGuid) value;
|
|
}
|
|
|
|
public
|
|
virtual
|
|
SqlInt16 GetSqlInt16 (int i)
|
|
{
|
|
object value = GetSqlValue (i);
|
|
if (!(value is SqlInt16))
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
return (SqlInt16) value;
|
|
}
|
|
|
|
public
|
|
virtual
|
|
SqlInt32 GetSqlInt32 (int i)
|
|
{
|
|
object value = GetSqlValue (i);
|
|
if (!(value is SqlInt32))
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
return (SqlInt32) value;
|
|
}
|
|
|
|
public
|
|
virtual
|
|
SqlInt64 GetSqlInt64 (int i)
|
|
{
|
|
object value = GetSqlValue (i);
|
|
if (!(value is SqlInt64))
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
return (SqlInt64) value;
|
|
}
|
|
|
|
public
|
|
virtual
|
|
SqlMoney GetSqlMoney (int i)
|
|
{
|
|
object value = GetSqlValue (i);
|
|
if (!(value is SqlMoney))
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
return (SqlMoney) value;
|
|
}
|
|
|
|
public
|
|
virtual
|
|
SqlSingle GetSqlSingle (int i)
|
|
{
|
|
object value = GetSqlValue (i);
|
|
if (!(value is SqlSingle))
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
return (SqlSingle) value;
|
|
}
|
|
|
|
public
|
|
virtual
|
|
SqlString GetSqlString (int i)
|
|
{
|
|
object value = GetSqlValue (i);
|
|
if (!(value is SqlString))
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
return (SqlString) value;
|
|
}
|
|
|
|
public virtual SqlXml GetSqlXml (int i)
|
|
{
|
|
object value = GetSqlValue (i);
|
|
if (!(value is SqlXml)) {
|
|
if (value is DBNull) {
|
|
throw new SqlNullValueException ();
|
|
} else if (command.Tds.TdsVersion <= TdsVersion.tds80 && value is SqlString) {
|
|
// Workaround for TDS 7/8/8.1 clients
|
|
// Xml column types are supported only from Sql Server 2005 / TDS 9, however
|
|
// when a TDS 7/8/8.1 client requests for Xml column data, Sql Server 2005 returns
|
|
// it as NTEXT
|
|
MemoryStream stream = null;
|
|
if (!((SqlString) value).IsNull)
|
|
stream = new MemoryStream (Encoding.Unicode.GetBytes (value.ToString()));
|
|
value = new SqlXml (stream);
|
|
} else {
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
}
|
|
}
|
|
return (SqlXml) value;
|
|
}
|
|
|
|
public
|
|
virtual
|
|
object GetSqlValue (int i)
|
|
{
|
|
object value = GetValue (i);
|
|
//Console.WriteLine ("Type of value: {0}", value.GetType ());
|
|
|
|
SqlDbType type = GetSchemaRowDbType (i);
|
|
switch (type) {
|
|
case SqlDbType.BigInt:
|
|
if (value == DBNull.Value)
|
|
return SqlInt64.Null;
|
|
return (SqlInt64) ((long) value);
|
|
case SqlDbType.Binary:
|
|
case SqlDbType.Image:
|
|
case SqlDbType.VarBinary:
|
|
case SqlDbType.Timestamp:
|
|
if (value == DBNull.Value)
|
|
return SqlBinary.Null;
|
|
return (SqlBinary) ((byte[]) value);
|
|
case SqlDbType.Bit:
|
|
if (value == DBNull.Value)
|
|
return SqlBoolean.Null;
|
|
return (SqlBoolean) ((bool) value);
|
|
case SqlDbType.Char:
|
|
case SqlDbType.NChar:
|
|
case SqlDbType.NText:
|
|
case SqlDbType.NVarChar:
|
|
case SqlDbType.Text:
|
|
case SqlDbType.VarChar:
|
|
if (value == DBNull.Value)
|
|
return SqlString.Null;
|
|
return (SqlString) ((string) value);
|
|
case SqlDbType.DateTime:
|
|
case SqlDbType.SmallDateTime:
|
|
if (value == DBNull.Value)
|
|
return SqlDateTime.Null;
|
|
return (SqlDateTime) ((DateTime) value);
|
|
case SqlDbType.Decimal:
|
|
if (value == DBNull.Value)
|
|
return SqlDecimal.Null;
|
|
if (value is TdsBigDecimal)
|
|
return SqlDecimalExtensions.FromTdsBigDecimal ((TdsBigDecimal) value);
|
|
if (value is Int64)
|
|
return (SqlDecimal)((long) value);
|
|
return (SqlDecimal) ((decimal) value);
|
|
case SqlDbType.Float:
|
|
if (value == DBNull.Value)
|
|
return SqlDouble.Null;
|
|
return (SqlDouble) ((double) value);
|
|
case SqlDbType.Int:
|
|
if (value == DBNull.Value)
|
|
return SqlInt32.Null;
|
|
return (SqlInt32) ((int) value);
|
|
case SqlDbType.Money:
|
|
case SqlDbType.SmallMoney:
|
|
if (value == DBNull.Value)
|
|
return SqlMoney.Null;
|
|
return (SqlMoney) ((decimal) value);
|
|
case SqlDbType.Real:
|
|
if (value == DBNull.Value)
|
|
return SqlSingle.Null;
|
|
return (SqlSingle) ((float) value);
|
|
case SqlDbType.UniqueIdentifier:
|
|
if (value == DBNull.Value)
|
|
return SqlGuid.Null;
|
|
return (SqlGuid) ((Guid) value);
|
|
case SqlDbType.SmallInt:
|
|
if (value == DBNull.Value)
|
|
return SqlInt16.Null;
|
|
return (SqlInt16) ((short) value);
|
|
case SqlDbType.TinyInt:
|
|
if (value == DBNull.Value)
|
|
return SqlByte.Null;
|
|
return (SqlByte) ((byte) value);
|
|
case SqlDbType.Xml:
|
|
if (value == DBNull.Value)
|
|
return SqlByte.Null;
|
|
return (SqlXml) value;
|
|
}
|
|
|
|
throw new InvalidOperationException ("The type of this column is unknown.");
|
|
}
|
|
|
|
public
|
|
virtual
|
|
int GetSqlValues (object[] values)
|
|
{
|
|
ValidateState ();
|
|
EnsureDataAvailable ();
|
|
|
|
if (values == null)
|
|
throw new ArgumentNullException ("values");
|
|
|
|
int count = 0;
|
|
int columnCount = command.Tds.Columns.Count;
|
|
int arrayCount = values.Length;
|
|
|
|
if (arrayCount > columnCount)
|
|
count = columnCount;
|
|
else
|
|
count = arrayCount;
|
|
|
|
for (int i = 0; i < count; i += 1)
|
|
values [i] = GetSqlValue (i);
|
|
|
|
return count;
|
|
}
|
|
|
|
public
|
|
override
|
|
string GetString (int i)
|
|
{
|
|
object value = GetValue (i);
|
|
if (!(value is string)) {
|
|
if (value is DBNull) throw new SqlNullValueException ();
|
|
throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
}
|
|
return (string) value;
|
|
}
|
|
|
|
public
|
|
override
|
|
object GetValue (int i)
|
|
{
|
|
ValidateState ();
|
|
EnsureDataAvailable ();
|
|
|
|
if (i < 0 || i >= command.Tds.Columns.Count)
|
|
throw new IndexOutOfRangeException ();
|
|
|
|
try {
|
|
if ((command.CommandBehavior & CommandBehavior.SequentialAccess) != 0) {
|
|
return ((Tds)command.Tds).GetSequentialColumnValue (i);
|
|
}
|
|
} catch (TdsInternalException ex) {
|
|
command.Connection.Close ();
|
|
throw SqlException.FromTdsInternalException ((TdsInternalException) ex);
|
|
}
|
|
|
|
return command.Tds.ColumnValues [i];
|
|
}
|
|
|
|
public
|
|
override
|
|
int GetValues (object[] values)
|
|
{
|
|
ValidateState ();
|
|
EnsureDataAvailable ();
|
|
|
|
if (values == null)
|
|
throw new ArgumentNullException ("values");
|
|
|
|
int len = values.Length;
|
|
var tds = command.Tds;
|
|
int columns = Math.Min (len, tds.Columns.Count);
|
|
|
|
if ((command.CommandBehavior & CommandBehavior.SequentialAccess) != 0) {
|
|
for (int i = 0; i < columns; ++i) {
|
|
values [i] = tds.GetSequentialColumnValue (i);
|
|
}
|
|
} else {
|
|
int bigDecimalIndex = tds.ColumnValues.BigDecimalIndex;
|
|
|
|
// If a four-byte decimal is stored, then we can't convert to
|
|
// a native type. Throw an OverflowException.
|
|
if (bigDecimalIndex >= 0 && bigDecimalIndex < len)
|
|
throw new OverflowException ();
|
|
try {
|
|
tds.ColumnValues.CopyTo (0, values, 0, columns);
|
|
} catch (TdsInternalException ex) {
|
|
command.Connection.Close ();
|
|
throw SqlException.FromTdsInternalException ((TdsInternalException)ex);
|
|
}
|
|
}
|
|
|
|
return columns;
|
|
}
|
|
|
|
|
|
public override IEnumerator GetEnumerator ()
|
|
{
|
|
return new DbEnumerator (this);
|
|
}
|
|
|
|
public
|
|
override
|
|
bool IsDBNull (int i)
|
|
{
|
|
return GetValue (i) == DBNull.Value;
|
|
}
|
|
|
|
public
|
|
override
|
|
bool NextResult ()
|
|
{
|
|
ValidateState ();
|
|
|
|
if ((command.CommandBehavior & CommandBehavior.SingleResult) != 0 && resultsRead > 0) {
|
|
moreResults = false;
|
|
rowsRead = 0;
|
|
haveRead = false;
|
|
return false;
|
|
}
|
|
|
|
try {
|
|
moreResults = command.Tds.NextResult ();
|
|
} catch (TdsInternalException ex) {
|
|
command.Connection.Close ();
|
|
throw SqlException.FromTdsInternalException ((TdsInternalException) ex);
|
|
}
|
|
if (!moreResults)
|
|
command.GetOutputParameters ();
|
|
else {
|
|
// new schema - don't do anything except reset schemaTable as command.Tds.Columns is already updated
|
|
schemaTable = null;
|
|
}
|
|
|
|
rowsRead = 0;
|
|
haveRead = false;
|
|
resultsRead += 1;
|
|
return moreResults;
|
|
}
|
|
|
|
public
|
|
override
|
|
bool Read ()
|
|
{
|
|
ValidateState ();
|
|
|
|
if (!haveRead || readResultUsed)
|
|
readResult = ReadRecord ();
|
|
readResultUsed = true;
|
|
return readResult;
|
|
}
|
|
|
|
internal bool ReadRecord ()
|
|
{
|
|
readResultUsed = false;
|
|
|
|
if ((command.CommandBehavior & CommandBehavior.SingleRow) != 0 && haveRead)
|
|
return false;
|
|
if ((command.CommandBehavior & CommandBehavior.SchemaOnly) != 0)
|
|
return false;
|
|
if (!moreResults)
|
|
return false;
|
|
|
|
try {
|
|
bool result = command.Tds.NextRow ();
|
|
if (result)
|
|
rowsRead++;
|
|
haveRead = true;
|
|
return result;
|
|
} catch (TdsInternalException ex) {
|
|
command.Connection.Close ();
|
|
throw SqlException.FromTdsInternalException ((TdsInternalException) ex);
|
|
}
|
|
}
|
|
|
|
void ValidateState ()
|
|
{
|
|
if (IsClosed)
|
|
throw new InvalidOperationException ("Invalid attempt to read data when reader is closed");
|
|
}
|
|
|
|
void EnsureDataAvailable ()
|
|
{
|
|
if (!readResult || !haveRead || !readResultUsed)
|
|
throw new InvalidOperationException ("No data available.");
|
|
}
|
|
|
|
InvalidCastException CreateGetBytesOnInvalidColumnTypeException (int ordinal)
|
|
{
|
|
string message = string.Format (CultureInfo.InvariantCulture,
|
|
"Invalid attempt to GetBytes on column '{0}'." +
|
|
"The GetBytes function can only be used on " +
|
|
"columns of type Text, NText, or Image.",
|
|
GetName (ordinal));
|
|
return new InvalidCastException (message);
|
|
}
|
|
|
|
public override Type GetProviderSpecificFieldType (int i)
|
|
{
|
|
return (GetSqlValue (i).GetType());
|
|
}
|
|
|
|
public override object GetProviderSpecificValue (int i)
|
|
{
|
|
return (GetSqlValue (i));
|
|
}
|
|
|
|
public override int GetProviderSpecificValues (object [] values)
|
|
{
|
|
return (GetSqlValues (values));
|
|
}
|
|
|
|
public virtual SqlBytes GetSqlBytes (int i)
|
|
{
|
|
//object value = GetSqlValue (i);
|
|
//if (!(value is SqlBinary))
|
|
// throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
|
|
Byte[] val = (byte[])GetValue(i);
|
|
SqlBytes sb = new SqlBytes (val);
|
|
return (sb);
|
|
}
|
|
|
|
[MonoTODO]
|
|
public override T GetFieldValue<T> (int i)
|
|
{
|
|
throw new NotImplementedException ();
|
|
}
|
|
|
|
[MonoTODO]
|
|
public virtual XmlReader GetXmlReader (int i)
|
|
{
|
|
throw new NotImplementedException ();
|
|
}
|
|
|
|
#endregion // Methods
|
|
}
|
|
}
|