94 lines
2.9 KiB
C#
94 lines
2.9 KiB
C#
//
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// DataRowExtensions.cs
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//
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// Author:
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// Atsushi Enomoto <atsushi@ximian.com>
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//
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// Copyright (C) 2008 Novell, Inc. http://www.novell.com
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//
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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 System;
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using System.Runtime.CompilerServices;
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namespace System.Data
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{
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public static class DataRowExtensions
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{
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public static T Field<T> (this DataRow row, int columnIndex)
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{
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return Field<T> (row, columnIndex, DataRowVersion.Current);
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}
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public static T Field<T> (this DataRow row, int columnIndex, DataRowVersion version)
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{
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object ret = row [columnIndex, version];
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if (ret == DBNull.Value) {
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Type type = typeof (T);
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Type genericTypeDef = type.IsGenericType ? type.GetGenericTypeDefinition () : null;
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if (!type.IsValueType || genericTypeDef != null && genericTypeDef == typeof (Nullable <>))
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return default (T);
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throw new StrongTypingException ("Cannot get strong typed value since it is DB null. Please use a nullable type.", null);
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}
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return (T) ret;
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}
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public static T Field<T> (this DataRow row, string columnName)
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{
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return Field<T> (row, columnName, DataRowVersion.Current);
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}
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public static T Field<T> (this DataRow row, string columnName, DataRowVersion version)
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{
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return Field<T> (row, row.Table.Columns [columnName], version);
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}
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public static T Field<T> (this DataRow row, DataColumn column)
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{
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return Field<T> (row, column, DataRowVersion.Current);
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}
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public static T Field<T> (this DataRow row, DataColumn column, DataRowVersion version)
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{
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return Field<T> (row, row.Table.Columns.IndexOf (column), version);
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}
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public static void SetField<T> (this DataRow row, int columnIndex, T value)
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{
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row [columnIndex] = value;
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}
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public static void SetField<T> (this DataRow row, string columnName, T value)
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{
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row [columnName] = value;
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}
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public static void SetField<T> (this DataRow row, DataColumn column, T value)
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{
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row [column] = value;
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}
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}
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}
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