Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / UI / WebControls / Listbox.cs / 1305376 / 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; ////// [ ValidationProperty("SelectedItem"), SupportsEventValidation ] 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) { // check new indices against old indices // assumes selected values are posted in order 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) { // VSWhidbey 204824 Page.AutoPostBackControl = this; if (CausesValidation) { Page.Validate(ValidationGroup); } } OnSelectedIndexChanged(EventArgs.Empty); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.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
- CustomWebEventKey.cs
- StringOutput.cs
- TextureBrush.cs
- SmtpAuthenticationManager.cs
- AtomServiceDocumentSerializer.cs
- DependencyProperty.cs
- ServiceMetadataBehavior.cs
- FigureParaClient.cs
- SoapDocumentServiceAttribute.cs
- Inline.cs
- HMACSHA256.cs
- DoubleCollectionValueSerializer.cs
- DataGridComponentEditor.cs
- EtwProvider.cs
- ExtendedPropertyCollection.cs
- OrCondition.cs
- EntityDataSourceWizardForm.cs
- SpeakInfo.cs
- WriterOutput.cs
- ByteAnimationBase.cs
- ToolStripItemRenderEventArgs.cs
- XPathParser.cs
- ManagementDateTime.cs
- ResourceSet.cs
- WindowsListViewGroupSubsetLink.cs
- ResourcePart.cs
- TransactionFlowBindingElement.cs
- XmlEncodedRawTextWriter.cs
- ElapsedEventArgs.cs
- PoisonMessageException.cs
- SafeRightsManagementPubHandle.cs
- Rect3DConverter.cs
- SocketPermission.cs
- ScopedKnownTypes.cs
- ArrayElementGridEntry.cs
- EmptyEnumerable.cs
- ProtocolViolationException.cs
- AttributedMetaModel.cs
- FilterEventArgs.cs
- Model3D.cs
- ProxyFragment.cs
- XmlSerializerVersionAttribute.cs
- versioninfo.cs
- TripleDESCryptoServiceProvider.cs
- ErrorStyle.cs
- DrawingContextWalker.cs
- DataGridViewColumn.cs
- X509Utils.cs
- DiscoveryExceptionDictionary.cs
- ProgressiveCrcCalculatingStream.cs
- QuestionEventArgs.cs
- SignatureHelper.cs
- CipherData.cs
- DesignerSerializationOptionsAttribute.cs
- DataGridViewAccessibleObject.cs
- FacetValueContainer.cs
- WebReference.cs
- X509SubjectKeyIdentifierClause.cs
- TextRunCache.cs
- IisNotInstalledException.cs
- CellTreeNode.cs
- Options.cs
- SynchronizedDispatch.cs
- UndirectedGraph.cs
- Monitor.cs
- EpmHelper.cs
- FastPropertyAccessor.cs
- FileChangesMonitor.cs
- XmlSchemaAnnotation.cs
- ZipIOLocalFileHeader.cs
- IntPtr.cs
- ToolBarTray.cs
- KeyedQueue.cs
- InvokeWebServiceDesigner.cs
- BindableAttribute.cs
- DetailsViewInsertEventArgs.cs
- UpWmlMobileTextWriter.cs
- ListBox.cs
- ICspAsymmetricAlgorithm.cs
- IFlowDocumentViewer.cs
- Int32EqualityComparer.cs
- ConfigXmlText.cs
- UIElementPropertyUndoUnit.cs
- GuidelineSet.cs
- SafeMarshalContext.cs
- StringUtil.cs
- BitmapImage.cs
- ToolBarTray.cs
- SecurityPolicySection.cs
- ProcessStartInfo.cs
- RelationshipDetailsCollection.cs
- HttpRuntime.cs
- SchemaObjectWriter.cs
- SqlConnectionManager.cs
- SourceSwitch.cs
- ObjectDataSourceMethodEventArgs.cs
- CompressStream.cs
- GeneralTransformCollection.cs
- SQLInt16.cs
- ManipulationDeltaEventArgs.cs