1209 lines
36 KiB
C#
1209 lines
36 KiB
C#
//
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// System.Web.UI.WebControls.ObjectDataSourceView
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//
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// Authors:
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// Lluis Sanchez Gual (lluis@novell.com)
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//
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// (C) 2005 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.Reflection;
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using System.Collections;
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using System.Collections.Specialized;
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using System.ComponentModel;
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using System.IO;
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using System.Data;
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using System.Web.Compilation;
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namespace System.Web.UI.WebControls
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{
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public class ObjectDataSourceView : DataSourceView, IStateManager
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{
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ObjectDataSource owner;
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HttpContext context;
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Type objectType;
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Type dataObjectType;
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bool convertNullToDBNull = false;
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bool enablePaging = false;
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string dataObjectTypeName = null;
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string filterExpression = null;
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string maximumRowsParameterName = null;
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string oldValuesParameterFormatString = null;
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string deleteMethod = null;
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string insertMethod = null;
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string selectCountMethod = null;
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string selectMethod = null;
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string sortParameterName = null;
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string startRowIndexParameterName = null;
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string typeName = null;
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string updateMethod = null;
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bool isTrackingViewState = false;
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ParameterCollection selectParameters;
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ParameterCollection updateParameters;
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ParameterCollection deleteParameters;
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ParameterCollection insertParameters;
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ParameterCollection filterParameters;
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static readonly object DeletedEvent = new object();
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static readonly object DeletingEvent = new object();
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static readonly object FilteringEvent = new object();
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static readonly object InsertedEvent = new object();
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static readonly object InsertingEvent = new object();
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static readonly object ObjectCreatedEvent = new object();
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static readonly object ObjectCreatingEvent = new object();
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static readonly object ObjectDisposingEvent = new object();
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// static readonly object ResolvingMethodEvent = new object();
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static readonly object SelectedEvent = new object();
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static readonly object SelectingEvent = new object();
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static readonly object UpdatedEvent = new object();
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static readonly object UpdatingEvent = new object();
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public ObjectDataSourceView (ObjectDataSource owner, string name, HttpContext context): base (owner, name)
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{
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this.owner = owner;
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this.context = context;
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}
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public event ObjectDataSourceStatusEventHandler Deleted {
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add { Events.AddHandler (DeletedEvent, value); }
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remove { Events.RemoveHandler (DeletedEvent, value); }
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}
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public event ObjectDataSourceMethodEventHandler Deleting {
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add { Events.AddHandler (DeletingEvent, value); }
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remove { Events.RemoveHandler (DeletingEvent, value); }
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}
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public event ObjectDataSourceFilteringEventHandler Filtering {
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add { Events.AddHandler (FilteringEvent, value); }
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remove { Events.RemoveHandler (FilteringEvent, value); }
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}
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public event ObjectDataSourceStatusEventHandler Inserted {
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add { Events.AddHandler (InsertedEvent, value); }
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remove { Events.RemoveHandler (InsertedEvent, value); }
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}
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public event ObjectDataSourceMethodEventHandler Inserting {
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add { Events.AddHandler (InsertingEvent, value); }
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remove { Events.RemoveHandler (InsertingEvent, value); }
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}
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public event ObjectDataSourceObjectEventHandler ObjectCreated {
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add { Events.AddHandler (ObjectCreatedEvent, value); }
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remove { Events.RemoveHandler (ObjectCreatedEvent, value); }
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}
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public event ObjectDataSourceObjectEventHandler ObjectCreating {
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add { Events.AddHandler (ObjectCreatingEvent, value); }
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remove { Events.RemoveHandler (ObjectCreatingEvent, value); }
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}
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public event ObjectDataSourceDisposingEventHandler ObjectDisposing {
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add { Events.AddHandler (ObjectDisposingEvent, value); }
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remove { Events.RemoveHandler (ObjectDisposingEvent, value); }
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}
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/* public event ObjectDataSourceResolvingMethodEventHandler ResolvingMethod {
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add { Events.AddHandler (ResolvingMethodEvent, value); }
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remove { Events.RemoveHandler (ResolvingMethodEvent, value); }
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}
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*/
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public event ObjectDataSourceStatusEventHandler Selected {
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add { Events.AddHandler (SelectedEvent, value); }
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remove { Events.RemoveHandler (SelectedEvent, value); }
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}
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public event ObjectDataSourceSelectingEventHandler Selecting {
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add { Events.AddHandler (SelectingEvent, value); }
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remove { Events.RemoveHandler (SelectingEvent, value); }
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}
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public event ObjectDataSourceStatusEventHandler Updated {
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add { Events.AddHandler (UpdatedEvent, value); }
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remove { Events.RemoveHandler (UpdatedEvent, value); }
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}
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public event ObjectDataSourceMethodEventHandler Updating {
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add { Events.AddHandler (UpdatingEvent, value); }
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remove { Events.RemoveHandler (UpdatingEvent, value); }
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}
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protected virtual void OnDeleted (ObjectDataSourceStatusEventArgs e)
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{
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if (Events != null) {
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ObjectDataSourceStatusEventHandler eh = (ObjectDataSourceStatusEventHandler) Events [DeletedEvent];
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if (eh != null) eh (this, e);
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}
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}
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protected virtual void OnDeleting (ObjectDataSourceMethodEventArgs e)
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{
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if (Events != null) {
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ObjectDataSourceMethodEventHandler eh = (ObjectDataSourceMethodEventHandler) Events [DeletingEvent];
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if (eh != null) eh (this, e);
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}
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}
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protected virtual void OnFiltering (ObjectDataSourceFilteringEventArgs e)
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{
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if (Events != null) {
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ObjectDataSourceFilteringEventHandler eh = (ObjectDataSourceFilteringEventHandler) Events [FilteringEvent];
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if (eh != null) eh (this, e);
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}
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}
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protected virtual void OnInserted (ObjectDataSourceStatusEventArgs e)
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{
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if (Events != null) {
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ObjectDataSourceStatusEventHandler eh = (ObjectDataSourceStatusEventHandler) Events [InsertedEvent];
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if (eh != null) eh (this, e);
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}
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}
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protected virtual void OnInserting (ObjectDataSourceMethodEventArgs e)
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{
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if (Events != null) {
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ObjectDataSourceMethodEventHandler eh = (ObjectDataSourceMethodEventHandler) Events [InsertingEvent];
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if (eh != null) eh (this, e);
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}
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}
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protected virtual void OnObjectCreated (ObjectDataSourceEventArgs e)
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{
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if (Events != null) {
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ObjectDataSourceObjectEventHandler eh = (ObjectDataSourceObjectEventHandler) Events [ObjectCreatedEvent];
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if (eh != null) eh (this, e);
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}
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}
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protected virtual void OnObjectCreating (ObjectDataSourceEventArgs e)
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{
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if (Events != null) {
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ObjectDataSourceObjectEventHandler eh = (ObjectDataSourceObjectEventHandler) Events [ObjectCreatingEvent];
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if (eh != null) eh (this, e);
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}
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}
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protected virtual void OnObjectDisposing (ObjectDataSourceDisposingEventArgs e)
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{
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if (Events != null) {
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ObjectDataSourceDisposingEventHandler eh = (ObjectDataSourceDisposingEventHandler) Events [ObjectDisposingEvent];
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if (eh != null) eh (this, e);
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}
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}
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/* protected virtual void OnResolvingMethod (ObjectDataSourceResolvingMethodEventArgs e)
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{
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if (Events != null) {
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ObjectDataSourceResolvingMethodEventHandler eh = (ObjectDataSourceResolvingMethodEventHandler) Events [ResolvingMethodEvent];
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if (eh != null) eh (this, e);
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}
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}
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*/
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protected virtual void OnSelected (ObjectDataSourceStatusEventArgs e)
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{
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if (Events != null) {
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ObjectDataSourceStatusEventHandler eh = (ObjectDataSourceStatusEventHandler) Events [SelectedEvent];
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if (eh != null) eh (this, e);
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}
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}
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protected virtual void OnSelecting (ObjectDataSourceSelectingEventArgs e)
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{
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if (Events != null) {
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ObjectDataSourceSelectingEventHandler eh = (ObjectDataSourceSelectingEventHandler) Events [SelectingEvent];
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if (eh != null) eh (this, e);
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}
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}
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protected virtual void OnUpdated (ObjectDataSourceStatusEventArgs e)
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{
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if (Events != null) {
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ObjectDataSourceStatusEventHandler eh = (ObjectDataSourceStatusEventHandler) Events [UpdatedEvent];
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if (eh != null) eh (this, e);
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}
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}
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protected virtual void OnUpdating (ObjectDataSourceMethodEventArgs e)
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{
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if (Events != null) {
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ObjectDataSourceMethodEventHandler eh = (ObjectDataSourceMethodEventHandler) Events [UpdatingEvent];
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if (eh != null) eh (this, e);
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}
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}
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public override bool CanDelete {
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get { return DeleteMethod.Length > 0; }
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}
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public override bool CanInsert {
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get { return InsertMethod.Length > 0; }
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}
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public override bool CanPage {
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get { return EnablePaging; }
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}
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public override bool CanRetrieveTotalRowCount {
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get {
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if( SelectCountMethod.Length > 0)
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return true;
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return !EnablePaging;
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}
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}
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public override bool CanSort {
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get { return true; }
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}
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public override bool CanUpdate {
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get { return UpdateMethod.Length > 0; }
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}
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// LAME SPEC: MSDN says value should be stored in ViewState but tests show otherwise.
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ConflictOptions conflictDetection = ConflictOptions.OverwriteChanges;
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public ConflictOptions ConflictDetection {
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get { return conflictDetection; }
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set {
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if (ConflictDetection == value)
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return;
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conflictDetection = value;
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OnDataSourceViewChanged (EventArgs.Empty);
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}
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}
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public bool ConvertNullToDBNull {
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get { return convertNullToDBNull; }
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set { convertNullToDBNull = value; }
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}
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public string DataObjectTypeName {
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get {
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return dataObjectTypeName != null ? dataObjectTypeName : string.Empty;
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}
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set {
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if (DataObjectTypeName == value)
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return;
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dataObjectTypeName = value;
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dataObjectType = null;
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OnDataSourceViewChanged (EventArgs.Empty);
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}
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}
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public string DeleteMethod {
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get {
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return deleteMethod != null ? deleteMethod : string.Empty;
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}
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set {
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deleteMethod = value;
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}
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}
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public ParameterCollection DeleteParameters {
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get {
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if (deleteParameters == null) {
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deleteParameters = new ParameterCollection ();
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}
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return deleteParameters;
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}
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}
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public bool EnablePaging {
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get {
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return enablePaging;
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}
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set {
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if (EnablePaging == value)
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return;
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enablePaging = value;
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OnDataSourceViewChanged (EventArgs.Empty);
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}
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}
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public string FilterExpression {
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get {
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return filterExpression != null ? filterExpression : string.Empty;
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}
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set {
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if (FilterExpression == value)
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return;
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filterExpression = value;
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OnDataSourceViewChanged (EventArgs.Empty);
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}
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}
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public ParameterCollection FilterParameters {
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get {
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if (filterParameters == null) {
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filterParameters = new ParameterCollection ();
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filterParameters.ParametersChanged += new EventHandler (OnParametersChanged);
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if (IsTrackingViewState)
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((IStateManager)filterParameters).TrackViewState ();
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}
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return filterParameters;
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}
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}
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public string InsertMethod {
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get {
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return insertMethod != null ? insertMethod : string.Empty;
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}
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set {
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insertMethod = value;
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}
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}
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public ParameterCollection InsertParameters {
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get {
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if (insertParameters == null) {
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insertParameters = new ParameterCollection ();
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}
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return insertParameters;
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}
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}
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public string MaximumRowsParameterName {
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get {
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return maximumRowsParameterName != null ? maximumRowsParameterName : "maximumRows";
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}
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set {
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if (MaximumRowsParameterName == value)
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return;
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maximumRowsParameterName = value;
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OnDataSourceViewChanged (EventArgs.Empty);
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}
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}
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[DefaultValue ("{0}")]
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public string OldValuesParameterFormatString {
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get {
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return oldValuesParameterFormatString != null ? oldValuesParameterFormatString : "{0}";
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}
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set {
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if (OldValuesParameterFormatString == value)
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return;
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oldValuesParameterFormatString = value;
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OnDataSourceViewChanged (EventArgs.Empty);
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}
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}
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public string SelectCountMethod {
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get {
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return selectCountMethod != null ? selectCountMethod : string.Empty;
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}
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set {
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if (SelectCountMethod == value)
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return;
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selectCountMethod = value;
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OnDataSourceViewChanged (EventArgs.Empty);
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}
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}
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public string SelectMethod {
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get {
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return selectMethod != null ? selectMethod : string.Empty;
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}
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set {
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if (SelectMethod == value)
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return;
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selectMethod = value;
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OnDataSourceViewChanged (EventArgs.Empty);
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}
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}
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public ParameterCollection SelectParameters {
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get {
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if (selectParameters == null) {
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selectParameters = new ParameterCollection ();
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selectParameters.ParametersChanged += new EventHandler (OnParametersChanged);
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if (IsTrackingViewState)
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((IStateManager)selectParameters).TrackViewState ();
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}
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return selectParameters;
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}
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}
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public string SortParameterName {
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get {
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return sortParameterName != null ? sortParameterName : string.Empty;
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}
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set {
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sortParameterName = value;
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}
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}
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public string StartRowIndexParameterName {
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get {
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return startRowIndexParameterName != null ? startRowIndexParameterName : "startRowIndex";
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}
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set {
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if (StartRowIndexParameterName == value)
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return;
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startRowIndexParameterName = value;
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OnDataSourceViewChanged (EventArgs.Empty);
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}
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}
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public string TypeName {
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get {
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return typeName != null ? typeName : string.Empty;
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}
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set {
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if (TypeName == value)
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return;
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typeName = value;
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objectType = null;
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OnDataSourceViewChanged (EventArgs.Empty);
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}
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}
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public string UpdateMethod {
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get {
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return updateMethod != null ? updateMethod : string.Empty;
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}
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set {
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updateMethod = value;
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}
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}
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public ParameterCollection UpdateParameters {
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get {
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if (updateParameters == null) {
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updateParameters = new ParameterCollection ();
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}
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return updateParameters;
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}
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}
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Type ObjectType {
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get {
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if (objectType == null) {
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objectType = HttpApplication.LoadType (TypeName);
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if (objectType == null)
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throw new InvalidOperationException ("Type not found: " + TypeName);
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}
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return objectType;
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}
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}
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Type DataObjectType {
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get {
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if (dataObjectType == null) {
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dataObjectType = HttpApplication.LoadType (DataObjectTypeName);
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if (dataObjectType == null)
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throw new InvalidOperationException ("Type not found: " + DataObjectTypeName);
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}
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return dataObjectType;
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}
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}
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public IEnumerable Select (DataSourceSelectArguments arguments)
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{
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return ExecuteSelect (arguments);
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}
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public int Update (IDictionary keys, IDictionary values, IDictionary oldValues)
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{
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return ExecuteUpdate (keys, values, oldValues);
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}
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public int Delete (IDictionary keys, IDictionary oldValues)
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{
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return ExecuteDelete (keys, oldValues);
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}
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public int Insert (IDictionary values)
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{
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return ExecuteInsert (values);
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}
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protected override int ExecuteInsert (IDictionary values)
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{
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if (!CanInsert)
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throw new NotSupportedException ("Insert operation not supported.");
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IOrderedDictionary paramValues;
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MethodInfo method;
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if (DataObjectTypeName.Length == 0) {
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paramValues = MergeParameterValues (InsertParameters, values, null);
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method = GetObjectMethod (InsertMethod, paramValues, DataObjectMethodType.Insert);
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} else {
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method = ResolveDataObjectMethod (InsertMethod, values, null, out paramValues);
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}
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ObjectDataSourceMethodEventArgs args = new ObjectDataSourceMethodEventArgs (paramValues);
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OnInserting (args);
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if (args.Cancel)
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return -1;
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ObjectDataSourceStatusEventArgs rargs = InvokeMethod (method, paramValues);
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OnInserted (rargs);
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if (rargs.Exception != null && !rargs.ExceptionHandled)
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throw rargs.Exception;
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if (owner.EnableCaching)
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owner.Cache.Expire ();
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OnDataSourceViewChanged (EventArgs.Empty);
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return -1;
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}
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protected override int ExecuteDelete (IDictionary keys, IDictionary oldValues)
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{
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if (!CanDelete)
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throw new NotSupportedException ("Delete operation not supported.");
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if (ConflictDetection == ConflictOptions.CompareAllValues && (oldValues == null || oldValues.Count == 0))
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throw new InvalidOperationException ("ConflictDetection is set to CompareAllValues and oldValues collection is null or empty.");
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IDictionary oldDataValues;
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oldDataValues = BuildOldValuesList (keys, oldValues, false);
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IOrderedDictionary paramValues;
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MethodInfo method;
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if (DataObjectTypeName.Length == 0) {
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|
paramValues = MergeParameterValues (DeleteParameters, null, oldDataValues);
|
|
method = GetObjectMethod (DeleteMethod, paramValues, DataObjectMethodType.Delete);
|
|
} else {
|
|
method = ResolveDataObjectMethod (DeleteMethod, oldDataValues, null, out paramValues);
|
|
}
|
|
|
|
ObjectDataSourceMethodEventArgs args = new ObjectDataSourceMethodEventArgs (paramValues);
|
|
OnDeleting (args);
|
|
if (args.Cancel)
|
|
return -1;
|
|
|
|
ObjectDataSourceStatusEventArgs rargs = InvokeMethod (method, paramValues);
|
|
|
|
OnDeleted (rargs);
|
|
|
|
if (rargs.Exception != null && !rargs.ExceptionHandled)
|
|
throw rargs.Exception;
|
|
|
|
if (owner.EnableCaching)
|
|
owner.Cache.Expire ();
|
|
|
|
OnDataSourceViewChanged (EventArgs.Empty);
|
|
|
|
return -1;
|
|
}
|
|
|
|
protected override int ExecuteUpdate (IDictionary keys, IDictionary values, IDictionary oldValues)
|
|
{
|
|
IOrderedDictionary paramValues;
|
|
MethodInfo method;
|
|
|
|
IDictionary oldDataValues;
|
|
oldDataValues = BuildOldValuesList (keys, oldValues, true);
|
|
|
|
if (DataObjectTypeName.Length == 0)
|
|
{
|
|
IDictionary dataValues;
|
|
dataValues = values;
|
|
paramValues = MergeParameterValues (UpdateParameters, dataValues, oldDataValues);
|
|
method = GetObjectMethod (UpdateMethod, paramValues, DataObjectMethodType.Update);
|
|
}
|
|
else
|
|
{
|
|
if (ConflictDetection != ConflictOptions.CompareAllValues) {
|
|
oldDataValues = null;
|
|
}
|
|
IDictionary dataValues = new Hashtable ();
|
|
if (keys != null) {
|
|
foreach (DictionaryEntry de in keys)
|
|
dataValues [de.Key] = de.Value;
|
|
}
|
|
if (values != null) {
|
|
foreach (DictionaryEntry de in values)
|
|
dataValues [de.Key] = de.Value;
|
|
}
|
|
|
|
method = ResolveDataObjectMethod (UpdateMethod, dataValues, oldDataValues, out paramValues);
|
|
}
|
|
|
|
ObjectDataSourceMethodEventArgs args = new ObjectDataSourceMethodEventArgs (paramValues);
|
|
OnUpdating (args);
|
|
if (args.Cancel)
|
|
return -1;
|
|
|
|
ObjectDataSourceStatusEventArgs rargs = InvokeMethod (method, paramValues);
|
|
OnUpdated (rargs);
|
|
|
|
if (rargs.Exception != null && !rargs.ExceptionHandled)
|
|
throw rargs.Exception;
|
|
|
|
if (owner.EnableCaching)
|
|
owner.Cache.Expire ();
|
|
|
|
OnDataSourceViewChanged (EventArgs.Empty);
|
|
|
|
return -1;
|
|
}
|
|
|
|
IDictionary BuildOldValuesList (IDictionary keys, IDictionary oldValues, bool keysWin)
|
|
{
|
|
IDictionary oldDataValues;
|
|
if (ConflictDetection == ConflictOptions.CompareAllValues) {
|
|
oldDataValues = new Hashtable ();
|
|
if (keys != null && !keysWin) {
|
|
foreach (DictionaryEntry de in keys)
|
|
oldDataValues [de.Key] = de.Value;
|
|
}
|
|
if (oldValues != null) {
|
|
foreach (DictionaryEntry de in oldValues)
|
|
oldDataValues [de.Key] = de.Value;
|
|
}
|
|
if (keys != null && keysWin) {
|
|
foreach (DictionaryEntry de in keys)
|
|
oldDataValues [de.Key] = de.Value;
|
|
}
|
|
}
|
|
else {
|
|
oldDataValues = keys;
|
|
}
|
|
|
|
return oldDataValues;
|
|
}
|
|
|
|
protected internal override IEnumerable ExecuteSelect (DataSourceSelectArguments arguments)
|
|
{
|
|
arguments.RaiseUnsupportedCapabilitiesError (this);
|
|
|
|
IOrderedDictionary paramValues = MergeParameterValues (SelectParameters, null, null);
|
|
ObjectDataSourceSelectingEventArgs args = new ObjectDataSourceSelectingEventArgs (paramValues, arguments, false);
|
|
|
|
object result = null;
|
|
|
|
if (owner.EnableCaching)
|
|
result = owner.Cache.GetCachedObject (SelectMethod, SelectParameters);
|
|
|
|
if (result == null) {
|
|
OnSelecting (args);
|
|
if (args.Cancel)
|
|
return new ArrayList ();
|
|
|
|
if (CanPage) {
|
|
if (StartRowIndexParameterName.Length == 0)
|
|
throw new InvalidOperationException ("Paging is enabled, but the StartRowIndexParameterName property is not set.");
|
|
if (MaximumRowsParameterName.Length == 0)
|
|
throw new InvalidOperationException ("Paging is enabled, but the MaximumRowsParameterName property is not set.");
|
|
paramValues [StartRowIndexParameterName] = arguments.StartRowIndex;
|
|
paramValues [MaximumRowsParameterName] = arguments.MaximumRows;
|
|
}
|
|
|
|
if (SortParameterName.Length > 0)
|
|
paramValues [SortParameterName] = arguments.SortExpression;
|
|
|
|
result = InvokeSelect (SelectMethod, paramValues);
|
|
|
|
if (CanRetrieveTotalRowCount && arguments.RetrieveTotalRowCount)
|
|
arguments.TotalRowCount = QueryTotalRowCount (MergeParameterValues (SelectParameters, null, null), arguments);
|
|
|
|
if (owner.EnableCaching)
|
|
owner.Cache.SetCachedObject (SelectMethod, SelectParameters, result);
|
|
}
|
|
|
|
if (FilterExpression.Length > 0 && !(result is DataGrid || result is DataView || result is DataTable))
|
|
throw new NotSupportedException ("The FilterExpression property was set and the Select method does not return a DataSet, DataTable, or DataView.");
|
|
|
|
if (owner.EnableCaching && result is IDataReader)
|
|
throw new NotSupportedException ("Data source does not support caching objects that implement IDataReader");
|
|
|
|
if (result is DataSet) {
|
|
DataSet dset = (DataSet) result;
|
|
if (dset.Tables.Count == 0)
|
|
throw new InvalidOperationException ("The select method returnet a DataSet which doesn't contain any table.");
|
|
result = dset.Tables [0];
|
|
}
|
|
|
|
if (result is DataTable) {
|
|
DataView dview = new DataView ((DataTable)result);
|
|
if (arguments.SortExpression != null && arguments.SortExpression.Length > 0) {
|
|
dview.Sort = arguments.SortExpression;
|
|
}
|
|
if (FilterExpression.Length > 0) {
|
|
IOrderedDictionary fparams = FilterParameters.GetValues (context, owner);
|
|
ObjectDataSourceFilteringEventArgs fargs = new ObjectDataSourceFilteringEventArgs (fparams);
|
|
OnFiltering (fargs);
|
|
if (!fargs.Cancel) {
|
|
object[] formatValues = new object [fparams.Count];
|
|
for (int n=0; n<formatValues.Length; n++) {
|
|
formatValues [n] = fparams [n];
|
|
if (formatValues [n] == null) return dview;
|
|
}
|
|
dview.RowFilter = string.Format (FilterExpression, formatValues);
|
|
}
|
|
}
|
|
return dview;
|
|
}
|
|
|
|
if (result is IEnumerable)
|
|
return (IEnumerable) result;
|
|
else
|
|
return new object[] {result};
|
|
}
|
|
|
|
int QueryTotalRowCount (IOrderedDictionary mergedParameters, DataSourceSelectArguments arguments)
|
|
{
|
|
ObjectDataSourceSelectingEventArgs countArgs = new ObjectDataSourceSelectingEventArgs (mergedParameters, arguments, true);
|
|
OnSelecting (countArgs);
|
|
if (countArgs.Cancel)
|
|
return 0;
|
|
|
|
object count = InvokeSelect (SelectCountMethod, mergedParameters);
|
|
return (int) Convert.ChangeType (count, typeof(int));
|
|
}
|
|
|
|
object InvokeSelect (string methodName, IOrderedDictionary paramValues)
|
|
{
|
|
MethodInfo method = GetObjectMethod (methodName, paramValues, DataObjectMethodType.Select);
|
|
ObjectDataSourceStatusEventArgs rargs = InvokeMethod (method, paramValues);
|
|
OnSelected (rargs);
|
|
|
|
if (rargs.Exception != null && !rargs.ExceptionHandled)
|
|
throw rargs.Exception;
|
|
|
|
return rargs.ReturnValue;
|
|
}
|
|
|
|
ObjectDataSourceStatusEventArgs InvokeMethod (MethodInfo method, IOrderedDictionary paramValues)
|
|
{
|
|
object instance = null;
|
|
|
|
if (!method.IsStatic)
|
|
instance = CreateObjectInstance ();
|
|
|
|
ParameterInfo[] pars = method.GetParameters ();
|
|
|
|
ArrayList outParamInfos;
|
|
object[] methodArgs = GetParameterArray (pars, paramValues, out outParamInfos);
|
|
|
|
if (methodArgs == null)
|
|
throw CreateMethodException (method.Name, paramValues);
|
|
|
|
object result = null;
|
|
Hashtable outParams = null;
|
|
|
|
try {
|
|
result = method.Invoke (instance, methodArgs);
|
|
if (outParamInfos != null) {
|
|
outParams = new Hashtable ();
|
|
foreach (ParameterInfo op in outParamInfos)
|
|
outParams [op.Name] = methodArgs [op.Position];
|
|
}
|
|
return new ObjectDataSourceStatusEventArgs (result, outParams, null);
|
|
}
|
|
catch (Exception ex) {
|
|
return new ObjectDataSourceStatusEventArgs (result, outParams, ex);
|
|
}
|
|
finally {
|
|
if (instance != null)
|
|
DisposeObjectInstance (instance);
|
|
}
|
|
}
|
|
|
|
MethodInfo GetObjectMethod (string methodName, IOrderedDictionary parameters, DataObjectMethodType methodType)
|
|
{
|
|
MemberInfo[] methods = ObjectType.GetMember (methodName, MemberTypes.Method, BindingFlags.Instance |
|
|
BindingFlags.Static |
|
|
BindingFlags.Public |
|
|
BindingFlags.IgnoreCase |
|
|
BindingFlags.FlattenHierarchy);
|
|
if (methods.Length > 1) {
|
|
// MSDN: The ObjectDataSource resolves method overloads by method name and number
|
|
// of parameters; the names and types of the parameters are not considered.
|
|
// LAMESPEC: the tests show otherwise
|
|
DataObjectMethodAttribute methodAttribute = null;
|
|
MethodInfo methodInfo = null;
|
|
bool hasConflict = false;
|
|
foreach (MethodInfo me in methods) { // we look for methods only
|
|
ParameterInfo [] pinfos = me.GetParameters ();
|
|
if (pinfos.Length == parameters.Count) {
|
|
object [] attrs = me.GetCustomAttributes (typeof (DataObjectMethodAttribute), true);
|
|
DataObjectMethodAttribute domAttr = (attrs != null && attrs.Length > 0) ? (DataObjectMethodAttribute) attrs [0] : null;
|
|
if (domAttr != null && domAttr.MethodType != methodType)
|
|
continue;
|
|
|
|
bool paramsMatch = true;
|
|
foreach (ParameterInfo pinfo in pinfos) {
|
|
if (!parameters.Contains (pinfo.Name)) {
|
|
paramsMatch = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!paramsMatch)
|
|
continue;
|
|
|
|
if (domAttr != null) {
|
|
if (methodAttribute != null) {
|
|
if (methodAttribute.IsDefault) {
|
|
if (domAttr.IsDefault) {
|
|
methodInfo = null;
|
|
break; //fail due to a conflict
|
|
}
|
|
else
|
|
continue; //existing matches better
|
|
}
|
|
else {
|
|
methodInfo = null; //we override
|
|
hasConflict = !domAttr.IsDefault;
|
|
}
|
|
}
|
|
else
|
|
methodInfo = null; //we override
|
|
}
|
|
|
|
if (methodInfo == null) {
|
|
methodAttribute = domAttr;
|
|
methodInfo = me;
|
|
continue;
|
|
}
|
|
|
|
hasConflict = true;
|
|
}
|
|
}
|
|
|
|
if (!hasConflict && methodInfo != null)
|
|
return methodInfo;
|
|
}
|
|
else if (methods.Length == 1) {
|
|
MethodInfo me = methods[0] as MethodInfo;
|
|
if (me != null && me.GetParameters().Length == parameters.Count)
|
|
return me;
|
|
}
|
|
|
|
throw CreateMethodException (methodName, parameters);
|
|
}
|
|
|
|
MethodInfo ResolveDataObjectMethod (string methodName, IDictionary values, IDictionary oldValues, out IOrderedDictionary paramValues)
|
|
{
|
|
MethodInfo method;
|
|
if (oldValues != null)
|
|
method = ObjectType.GetMethod (methodName, new Type[] { DataObjectType, DataObjectType });
|
|
else
|
|
method = ObjectType.GetMethod (methodName, new Type[] { DataObjectType });
|
|
|
|
if (method == null)
|
|
throw new InvalidOperationException ("ObjectDataSource " + owner.ID + " could not find a method named '" + methodName + "' with parameters of type '" + DataObjectType + "' in '" + ObjectType + "'.");
|
|
|
|
paramValues = new OrderedDictionary (StringComparer.InvariantCultureIgnoreCase);
|
|
ParameterInfo[] ps = method.GetParameters ();
|
|
|
|
if (oldValues != null) {
|
|
if (FormatOldParameter (ps[0].Name) == ps[1].Name) {
|
|
paramValues [ps[0].Name] = CreateDataObject (values);
|
|
paramValues [ps[1].Name] = CreateDataObject (oldValues);
|
|
} else if (FormatOldParameter (ps[1].Name) == ps[0].Name) {
|
|
paramValues [ps[0].Name] = CreateDataObject (oldValues);
|
|
paramValues [ps[1].Name] = CreateDataObject (values);
|
|
} else
|
|
throw new InvalidOperationException ("Method '" + methodName + "' does not have any parameter that fits the value of OldValuesParameterFormatString.");
|
|
} else {
|
|
paramValues [ps[0].Name] = CreateDataObject (values);
|
|
}
|
|
return method;
|
|
}
|
|
|
|
Exception CreateMethodException (string methodName, IOrderedDictionary parameters)
|
|
{
|
|
string s = "";
|
|
foreach (string p in parameters.Keys) {
|
|
s += p + ", ";
|
|
}
|
|
return new InvalidOperationException ("ObjectDataSource " + owner.ID + " could not find a method named '" + methodName + "' with parameters " + s + "in type '" + ObjectType + "'.");
|
|
}
|
|
|
|
object CreateDataObject (IDictionary values)
|
|
{
|
|
object ob = Activator.CreateInstance (DataObjectType);
|
|
foreach (DictionaryEntry de in values) {
|
|
PropertyInfo p = DataObjectType.GetProperty ((string)de.Key);
|
|
if (p == null) throw new InvalidOperationException ("Property " + de.Key + " not found in type '" +DataObjectType + "'.");
|
|
object[] attributes = p.GetCustomAttributes (typeof (System.ComponentModel.TypeConverterAttribute),
|
|
true);
|
|
Type propertyType = p.PropertyType;
|
|
object value = de.Value;
|
|
object converted = ConvertParameterWithTypeConverter (attributes, propertyType, value);
|
|
if (converted == null)
|
|
converted = ConvertParameter (propertyType, value);
|
|
|
|
p.SetValue (ob, converted, null);
|
|
}
|
|
return ob;
|
|
}
|
|
|
|
object CreateObjectInstance ()
|
|
{
|
|
ObjectDataSourceEventArgs args = new ObjectDataSourceEventArgs (null);
|
|
OnObjectCreating (args);
|
|
|
|
if (args.ObjectInstance != null)
|
|
return args.ObjectInstance;
|
|
|
|
object ob = Activator.CreateInstance (ObjectType);
|
|
|
|
args.ObjectInstance = ob;
|
|
OnObjectCreated (args);
|
|
|
|
return args.ObjectInstance;
|
|
}
|
|
|
|
void DisposeObjectInstance (object obj)
|
|
{
|
|
ObjectDataSourceDisposingEventArgs args = new ObjectDataSourceDisposingEventArgs (obj);
|
|
OnObjectDisposing (args);
|
|
|
|
if (!args.Cancel) {
|
|
IDisposable disp = obj as IDisposable;
|
|
if (disp != null) disp.Dispose ();
|
|
}
|
|
}
|
|
|
|
object FindValueByName (string name, IDictionary values, bool format)
|
|
{
|
|
if (values == null)
|
|
return null;
|
|
|
|
foreach (DictionaryEntry de in values) {
|
|
string valueName = format == true ? FormatOldParameter (de.Key.ToString ()) : de.Key.ToString ();
|
|
if (String.Compare (name, valueName, StringComparison.InvariantCultureIgnoreCase) == 0)
|
|
return values [de.Key];
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Merge the current data item fields with view parameter default values
|
|
/// </summary>
|
|
/// <param name="viewParams">default parameters</param>
|
|
/// <param name="values">new parameters for update and insert</param>
|
|
/// <param name="oldValues">old parameters for update and delete</param>
|
|
/// <param name="allwaysAddNewValues">true for insert, as current item is
|
|
/// irrelevant for insert</param>
|
|
/// <returns>merged values</returns>
|
|
IOrderedDictionary MergeParameterValues (ParameterCollection viewParams, IDictionary values, IDictionary oldValues)
|
|
{
|
|
IOrderedDictionary parametersValues = viewParams.GetValues (context, owner);
|
|
OrderedDictionary mergedValues = new OrderedDictionary (StringComparer.InvariantCultureIgnoreCase);
|
|
foreach (string parameterName in parametersValues.Keys) {
|
|
mergedValues [parameterName] = parametersValues [parameterName];
|
|
if (oldValues != null) {
|
|
object value = FindValueByName (parameterName, oldValues, true);
|
|
if (value != null) {
|
|
object dataValue = viewParams [parameterName].ConvertValue (value);
|
|
mergedValues [parameterName] = dataValue;
|
|
}
|
|
}
|
|
|
|
if (values != null) {
|
|
object value = FindValueByName (parameterName, values, false);
|
|
if (value != null) {
|
|
object dataValue = viewParams [parameterName].ConvertValue (value);
|
|
mergedValues [parameterName] = dataValue;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (values != null) {
|
|
foreach (DictionaryEntry de in values)
|
|
if (FindValueByName ((string) de.Key, mergedValues, false) == null)
|
|
mergedValues [de.Key] = de.Value;
|
|
}
|
|
|
|
if (oldValues != null) {
|
|
foreach (DictionaryEntry de in oldValues) {
|
|
string oldValueKey = FormatOldParameter ((string) de.Key);
|
|
if (FindValueByName (oldValueKey, mergedValues, false) == null)
|
|
mergedValues [oldValueKey] = de.Value;
|
|
}
|
|
}
|
|
|
|
return mergedValues;
|
|
}
|
|
|
|
object[] GetParameterArray (ParameterInfo[] methodParams, IOrderedDictionary viewParams, out ArrayList outParamInfos)
|
|
{
|
|
// FIXME: make this case insensitive
|
|
|
|
outParamInfos = null;
|
|
object[] values = new object [methodParams.Length];
|
|
|
|
foreach (ParameterInfo mp in methodParams) {
|
|
|
|
// Parameter names must match
|
|
if (!viewParams.Contains (mp.Name)) return null;
|
|
|
|
values [mp.Position] = ConvertParameter (mp.ParameterType, viewParams [mp.Name]);
|
|
if (mp.ParameterType.IsByRef) {
|
|
if (outParamInfos == null) outParamInfos = new ArrayList ();
|
|
outParamInfos.Add (mp);
|
|
}
|
|
}
|
|
return values;
|
|
}
|
|
|
|
object ConvertParameterWithTypeConverter (object[] attributes, Type targetType, object value)
|
|
{
|
|
if (attributes == null || attributes.Length == 0 || value == null)
|
|
return null;
|
|
TypeConverterAttribute tca;
|
|
Type converterType;
|
|
TypeConverter converter;
|
|
|
|
foreach (object a in attributes) {
|
|
tca = a as TypeConverterAttribute;
|
|
if (tca == null)
|
|
continue;
|
|
converterType = HttpApplication.LoadType (tca.ConverterTypeName, false);
|
|
if (converterType == null)
|
|
continue;
|
|
converter = Activator.CreateInstance (converterType, new object[] {targetType}) as TypeConverter;
|
|
if (converter == null)
|
|
continue;
|
|
if (converter.CanConvertFrom (value.GetType ()))
|
|
return converter.ConvertFrom (value);
|
|
else if (converter.CanConvertFrom (typeof (string)))
|
|
return converter.ConvertFrom (value.ToString ());
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
object ConvertParameter (Type targetType, object value)
|
|
{
|
|
return ConvertParameter (Type.GetTypeCode (targetType), value);
|
|
}
|
|
|
|
object ConvertParameter (TypeCode targetType, object value)
|
|
{
|
|
if (value == null) {
|
|
if (targetType != TypeCode.Object && targetType != TypeCode.String)
|
|
value = 0;
|
|
else if (ConvertNullToDBNull)
|
|
return DBNull.Value;
|
|
}
|
|
if (targetType == TypeCode.Object || targetType == TypeCode.Empty)
|
|
return value;
|
|
else
|
|
return Convert.ChangeType (value, targetType);
|
|
}
|
|
|
|
string FormatOldParameter (string name)
|
|
{
|
|
string f = OldValuesParameterFormatString;
|
|
if (f.Length > 0)
|
|
return String.Format (f, name);
|
|
else
|
|
return name;
|
|
}
|
|
|
|
void OnParametersChanged (object sender, EventArgs args)
|
|
{
|
|
OnDataSourceViewChanged (EventArgs.Empty);
|
|
}
|
|
|
|
protected virtual void LoadViewState (object savedState)
|
|
{
|
|
object[] state = (savedState == null) ? new object [5] : (object[]) savedState;
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((IStateManager)SelectParameters).LoadViewState (state[0]);
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((IStateManager)UpdateParameters).LoadViewState (state[1]);
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((IStateManager)DeleteParameters).LoadViewState (state[2]);
|
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((IStateManager)InsertParameters).LoadViewState (state[3]);
|
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((IStateManager)FilterParameters).LoadViewState (state[4]);
|
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}
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|
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protected virtual object SaveViewState()
|
|
{
|
|
object[] state = new object [5];
|
|
|
|
if (selectParameters != null)
|
|
state [0] = ((IStateManager)selectParameters).SaveViewState ();
|
|
if (updateParameters != null)
|
|
state [1] = ((IStateManager)updateParameters).SaveViewState ();
|
|
if (deleteParameters != null)
|
|
state [2] = ((IStateManager)deleteParameters).SaveViewState ();
|
|
if (insertParameters != null)
|
|
state [3] = ((IStateManager)insertParameters).SaveViewState ();
|
|
if (filterParameters != null)
|
|
state [4] = ((IStateManager)filterParameters).SaveViewState ();
|
|
|
|
foreach (object ob in state)
|
|
if (ob != null) return state;
|
|
|
|
return null;
|
|
}
|
|
|
|
protected virtual void TrackViewState()
|
|
{
|
|
isTrackingViewState = true;
|
|
|
|
if (selectParameters != null) ((IStateManager)selectParameters).TrackViewState ();
|
|
if (filterParameters != null) ((IStateManager)filterParameters).TrackViewState ();
|
|
}
|
|
|
|
protected bool IsTrackingViewState
|
|
{
|
|
get { return isTrackingViewState; }
|
|
}
|
|
|
|
|
|
bool IStateManager.IsTrackingViewState
|
|
{
|
|
get { return IsTrackingViewState; }
|
|
}
|
|
|
|
void IStateManager.TrackViewState()
|
|
{
|
|
TrackViewState ();
|
|
}
|
|
|
|
void IStateManager.LoadViewState (object savedState)
|
|
{
|
|
LoadViewState (savedState);
|
|
}
|
|
|
|
object IStateManager.SaveViewState()
|
|
{
|
|
return SaveViewState ();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
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