Code:
/ FXUpdate3074 / FXUpdate3074 / 1.1 / DEVDIV / depot / DevDiv / releases / 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. // 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
- ConfigurationSection.cs
- Utils.cs
- ColumnMapVisitor.cs
- MULTI_QI.cs
- base64Transforms.cs
- NativeCppClassAttribute.cs
- UInt64Storage.cs
- ViewBox.cs
- ToolStripDesigner.cs
- ClientSideProviderDescription.cs
- SmtpTransport.cs
- RedistVersionInfo.cs
- LocalizationComments.cs
- UInt32Storage.cs
- ObjectDataSourceFilteringEventArgs.cs
- AdPostCacheSubstitution.cs
- KeyInterop.cs
- Msec.cs
- XmlSerializer.cs
- InsufficientExecutionStackException.cs
- UdpSocketReceiveManager.cs
- glyphs.cs
- ContentType.cs
- OletxTransactionHeader.cs
- DataGridViewCellStyleContentChangedEventArgs.cs
- CollectionBuilder.cs
- Faults.cs
- DispatcherHooks.cs
- Cell.cs
- AsyncOperation.cs
- SqlParameterizer.cs
- SocketInformation.cs
- TakeQueryOptionExpression.cs
- documentsequencetextcontainer.cs
- LambdaCompiler.Unary.cs
- DBCommandBuilder.cs
- TextHintingModeValidation.cs
- SerializationFieldInfo.cs
- PathGradientBrush.cs
- EdmScalarPropertyAttribute.cs
- ExternalException.cs
- OleDbError.cs
- PenLineCapValidation.cs
- FrameworkElement.cs
- Substitution.cs
- HMACMD5.cs
- HttpContextBase.cs
- SmiEventSink_Default.cs
- HostingEnvironmentException.cs
- DetailsViewInsertEventArgs.cs
- CultureInfo.cs
- TemplateApplicationHelper.cs
- Zone.cs
- MimeObjectFactory.cs
- ToolBarOverflowPanel.cs
- ContainerFilterService.cs
- Walker.cs
- Encoding.cs
- ScrollChrome.cs
- AppliedDeviceFiltersDialog.cs
- TableLayoutSettingsTypeConverter.cs
- FormsAuthenticationEventArgs.cs
- TagPrefixInfo.cs
- InkSerializer.cs
- LogPolicy.cs
- WindowsRebar.cs
- UnmanagedHandle.cs
- BoundColumn.cs
- FacetEnabledSchemaElement.cs
- XpsFilter.cs
- DBDataPermissionAttribute.cs
- XmlNamespaceMappingCollection.cs
- PointAnimation.cs
- CryptoHandle.cs
- ObjectDisposedException.cs
- MetafileHeader.cs
- DataGrid.cs
- AdRotator.cs
- ReferenceCountedObject.cs
- CapabilitiesAssignment.cs
- Random.cs
- CoTaskMemUnicodeSafeHandle.cs
- HostVisual.cs
- ETagAttribute.cs
- EndPoint.cs
- Content.cs
- SystemUnicastIPAddressInformation.cs
- NavigationWindowAutomationPeer.cs
- ASCIIEncoding.cs
- BamlLocalizableResourceKey.cs
- CharAnimationBase.cs
- FamilyCollection.cs
- AppDomainManager.cs
- Authorization.cs
- BitmapSource.cs
- CookieHandler.cs
- PagesChangedEventArgs.cs
- XmlTextReaderImpl.cs
- SimpleHandlerFactory.cs
- PointCollection.cs