Code:
/ FXUpdate3074 / FXUpdate3074 / 1.1 / untmp / whidbey / QFE / ndp / fx / src / xsp / System / Web / UI / WebControls / Listbox.cs / 2 / Listbox.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls { using System; using System.Collections; using System.Collections.Specialized; using System.ComponentModel; using System.Drawing; using System.Globalization; using System.Web; using System.Web.UI; using System.Security.Permissions; ////// [ ValidationProperty("SelectedItem"), SupportsEventValidation ] [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] public class ListBox : ListControl, IPostBackDataHandler { ///Constructs a list box and defines its /// properties. ////// public ListBox() { } ///Initializes a new instance of the ///class. /// [ Browsable(false) ] public override Color BorderColor { get { return base.BorderColor; } set { base.BorderColor = value; } } ///[To be supplied.] ////// [ Browsable(false) ] public override BorderStyle BorderStyle { get { return base.BorderStyle; } set { base.BorderStyle = value; } } ///[To be supplied.] ////// [ Browsable(false) ] public override Unit BorderWidth { get { return base.BorderWidth; } set { base.BorderWidth = value; } } internal override bool IsMultiSelectInternal { get { return SelectionMode == ListSelectionMode.Multiple; } } ///[To be supplied.] ////// [ WebCategory("Appearance"), DefaultValue(4), WebSysDescription(SR.ListBox_Rows) ] public virtual int Rows { get { object n = ViewState["Rows"]; return((n == null) ? 4 : (int)n); } set { if (value < 1) { throw new ArgumentOutOfRangeException("value"); } ViewState["Rows"] = value; } } ///Gets or /// sets the display height (in rows) of the list box. ////// [ WebCategory("Behavior"), DefaultValue(ListSelectionMode.Single), WebSysDescription(SR.ListBox_SelectionMode) ] public virtual ListSelectionMode SelectionMode { get { object sm = ViewState["SelectionMode"]; return((sm == null) ? ListSelectionMode.Single : (ListSelectionMode)sm); } set { if (value < ListSelectionMode.Single || value > ListSelectionMode.Multiple) { throw new ArgumentOutOfRangeException("value"); } ViewState["SelectionMode"] = value; } } ///Gets or sets /// the selection behavior of the list box. ///protected override void AddAttributesToRender(HtmlTextWriter writer) { writer.AddAttribute(HtmlTextWriterAttribute.Size, Rows.ToString(NumberFormatInfo.InvariantInfo)); string uniqueID = UniqueID; if (uniqueID != null) { writer.AddAttribute(HtmlTextWriterAttribute.Name, uniqueID); } base.AddAttributesToRender(writer); } public virtual int[] GetSelectedIndices() { return (int[])SelectedIndicesInternal.ToArray(typeof(int)); } /// /// /// protected internal override void OnPreRender(EventArgs e) { base.OnPreRender(e); if (Page != null && SelectionMode == ListSelectionMode.Multiple && Enabled) { // ensure postback when no item is selected Page.RegisterRequiresPostBack(this); } } ////// /// bool IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection) { return LoadPostData(postDataKey, postCollection); } ///Loads the posted content of the list control if it is different from the last /// posting. ////// /// protected virtual bool LoadPostData(String postDataKey, NameValueCollection postCollection) { if (IsEnabled == false) { // When a ListBox is disabled, then there is no postback // data for it. Any checked state information has been loaded // via view state. return false; } string[] selectedItems = postCollection.GetValues(postDataKey); bool selectionChanged = false; EnsureDataBound(); if (selectedItems != null) { if (SelectionMode == ListSelectionMode.Single) { ValidateEvent(postDataKey, selectedItems[0]); int n = Items.FindByValueInternal(selectedItems[0], false); if (SelectedIndex != n) { SetPostDataSelection(n); selectionChanged = true; } } else { // multiple selection int count = selectedItems.Length; ArrayList oldSelectedIndices = SelectedIndicesInternal; ArrayList newSelectedIndices = new ArrayList(count); for (int i=0; i < count; i++) { ValidateEvent(postDataKey, selectedItems[i]); // create array of new indices from posted values newSelectedIndices.Add(Items.FindByValueInternal(selectedItems[i], false)); } int oldcount = 0; if (oldSelectedIndices != null) oldcount = oldSelectedIndices.Count; if (oldcount == count) { // for (int i=0; i < count; i++) { if (((int)newSelectedIndices[i]) != ((int)oldSelectedIndices[i])) { selectionChanged = true; break; } } } else { // indices must have changed if count is different selectionChanged = true; } if (selectionChanged) { // select new indices SelectInternal(newSelectedIndices); } } } else { // no items selected if (SelectedIndex != -1) { SetPostDataSelection(-1); selectionChanged = true; } } return selectionChanged; } ///Loads the posted content of the list control if it is different from the last /// posting. ////// /// void IPostBackDataHandler.RaisePostDataChangedEvent() { RaisePostDataChangedEvent(); } ///Invokes the OnSelectedIndexChanged method whenever posted data /// for the ///control has changed. /// /// protected virtual void RaisePostDataChangedEvent() { if (AutoPostBack && !Page.IsPostBackEventControlRegistered) { // Page.AutoPostBackControl = this; if (CausesValidation) { Page.Validate(ValidationGroup); } } OnSelectedIndexChanged(EventArgs.Empty); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.Invokes the OnSelectedIndexChanged method whenever posted data /// for the ///control has changed.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- SerialStream.cs
- User.cs
- ListCollectionView.cs
- externdll.cs
- BindingExpression.cs
- Symbol.cs
- OrderedDictionary.cs
- SponsorHelper.cs
- CacheHelper.cs
- FontUnitConverter.cs
- GacUtil.cs
- SoapCodeExporter.cs
- HttpApplicationFactory.cs
- CurrentTimeZone.cs
- LambdaCompiler.Lambda.cs
- SecurityRuntime.cs
- EnterpriseServicesHelper.cs
- WrappedIUnknown.cs
- objectquery_tresulttype.cs
- NetworkAddressChange.cs
- EncodingStreamWrapper.cs
- FileUpload.cs
- SwitchAttribute.cs
- GrammarBuilderBase.cs
- TextTreeUndoUnit.cs
- ConfigXmlComment.cs
- TypeElement.cs
- DBConcurrencyException.cs
- PerformanceCounterLib.cs
- Executor.cs
- ExpressionParser.cs
- MatrixAnimationUsingPath.cs
- CurrencyWrapper.cs
- TypeSystemProvider.cs
- CheckBoxPopupAdapter.cs
- PreviewKeyDownEventArgs.cs
- SortableBindingList.cs
- LiteralDesigner.cs
- EmptyQuery.cs
- DisposableCollectionWrapper.cs
- SendMailErrorEventArgs.cs
- ImageInfo.cs
- RemoteHelper.cs
- SystemWebSectionGroup.cs
- UrlPath.cs
- GZipDecoder.cs
- OperandQuery.cs
- ContentElement.cs
- VectorValueSerializer.cs
- Renderer.cs
- ListCollectionView.cs
- COAUTHIDENTITY.cs
- DuplicateWaitObjectException.cs
- ClickablePoint.cs
- TextSpan.cs
- PropertyValueChangedEvent.cs
- __ComObject.cs
- WebPartDisplayModeCollection.cs
- XamlContextStack.cs
- SqlDataSourceWizardForm.cs
- SystemIcmpV6Statistics.cs
- validationstate.cs
- CalendarDateRangeChangingEventArgs.cs
- TimeIntervalCollection.cs
- DiscoveryViaBehavior.cs
- NullableFloatAverageAggregationOperator.cs
- FixedSOMFixedBlock.cs
- ToolStripButton.cs
- WindowsListViewGroupHelper.cs
- CodeIdentifier.cs
- Collection.cs
- GenericPrincipal.cs
- JoinCqlBlock.cs
- IssuerInformation.cs
- FixedPosition.cs
- BridgeDataRecord.cs
- SevenBitStream.cs
- Solver.cs
- Misc.cs
- FileDialog_Vista_Interop.cs
- KnownColorTable.cs
- ServiceProviders.cs
- ReadOnlyDataSource.cs
- IntegerValidator.cs
- ExternalFile.cs
- HashRepartitionEnumerator.cs
- DataStreamFromComStream.cs
- XmlnsCache.cs
- FilterException.cs
- HyperLinkStyle.cs
- DocumentGridContextMenu.cs
- SystemColors.cs
- RunInstallerAttribute.cs
- TextFormatterImp.cs
- XmlSchemaImport.cs
- Publisher.cs
- EventDescriptor.cs
- TextTreeUndo.cs
- CodeCatchClauseCollection.cs
- WebException.cs