Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / xsp / System / Web / UI / WebControls / Listbox.cs / 1 / 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) { // 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. // 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) { // 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
- TextEndOfLine.cs
- TextWriter.cs
- FullTextLine.cs
- FrameworkElementAutomationPeer.cs
- GenericTransactionFlowAttribute.cs
- ModuleConfigurationInfo.cs
- __TransparentProxy.cs
- TextSelectionHighlightLayer.cs
- SqlConnectionPoolProviderInfo.cs
- IIS7UserPrincipal.cs
- DateTimeValueSerializer.cs
- MethodMessage.cs
- PersonalizationStateInfoCollection.cs
- DataSvcMapFileSerializer.cs
- EntityDataReader.cs
- MSG.cs
- JoinSymbol.cs
- CodeNamespaceCollection.cs
- XmlDocumentFragment.cs
- Stack.cs
- QilValidationVisitor.cs
- MouseDevice.cs
- WebServiceTypeData.cs
- WebPartAddingEventArgs.cs
- RoleService.cs
- SQLMoney.cs
- WriterOutput.cs
- TextTreeFixupNode.cs
- ComponentResourceKeyConverter.cs
- XmlMtomWriter.cs
- RunClient.cs
- ValidationSummary.cs
- SynchronousChannelMergeEnumerator.cs
- MexHttpsBindingCollectionElement.cs
- SqlMethodTransformer.cs
- SqlTypesSchemaImporter.cs
- SqlEnums.cs
- FilterException.cs
- WrapperEqualityComparer.cs
- SiteMapProvider.cs
- TreeNodeBinding.cs
- __Filters.cs
- RectAnimationClockResource.cs
- SecurityManager.cs
- GuidTagList.cs
- CustomMenuItemCollection.cs
- ASCIIEncoding.cs
- AssociationEndMember.cs
- XhtmlBasicListAdapter.cs
- BigInt.cs
- SparseMemoryStream.cs
- HtmlInputPassword.cs
- UriExt.cs
- XmlSchemaSet.cs
- SQLMoney.cs
- Command.cs
- ContextMenu.cs
- CustomError.cs
- CardSpacePolicyElement.cs
- GraphicsPathIterator.cs
- PublishLicense.cs
- ModuleBuilderData.cs
- StringConverter.cs
- DebugView.cs
- SerializerDescriptor.cs
- TextElementEnumerator.cs
- ConfigurationManagerHelper.cs
- XmlReader.cs
- DataSourceNameHandler.cs
- Operand.cs
- TraceSection.cs
- Directory.cs
- ExtractedStateEntry.cs
- WebExceptionStatus.cs
- COM2EnumConverter.cs
- WorkflowItemPresenter.cs
- EvidenceBase.cs
- SignatureToken.cs
- NameTable.cs
- BitmapFrame.cs
- WebPartDesigner.cs
- NotifyInputEventArgs.cs
- SqlClientWrapperSmiStreamChars.cs
- TrustManagerPromptUI.cs
- ServiceDescriptions.cs
- StyleBamlTreeBuilder.cs
- GradientBrush.cs
- SizeAnimation.cs
- GridItemPattern.cs
- InputBindingCollection.cs
- ImageList.cs
- SmiEventSink_Default.cs
- TreeViewItemAutomationPeer.cs
- XmlQueryCardinality.cs
- ViewStateModeByIdAttribute.cs
- Constraint.cs
- UrlPropertyAttribute.cs
- HashLookup.cs
- FileController.cs
- PassportIdentity.cs