Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / 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
- RootBrowserWindow.cs
- BufferedStream.cs
- DataGridViewBindingCompleteEventArgs.cs
- TreeNodeCollectionEditor.cs
- FixUpCollection.cs
- ExternalFile.cs
- ApplicationSettingsBase.cs
- AdornerHitTestResult.cs
- WindowsStartMenu.cs
- AVElementHelper.cs
- EnumBuilder.cs
- StrokeNodeEnumerator.cs
- FormsAuthentication.cs
- FileStream.cs
- EntryWrittenEventArgs.cs
- XmlIncludeAttribute.cs
- HttpPostLocalhostServerProtocol.cs
- ServiceBehaviorElementCollection.cs
- OperationInfoBase.cs
- ButtonFieldBase.cs
- MessageQueuePermissionAttribute.cs
- ListItemConverter.cs
- SqlFileStream.cs
- SqlBuffer.cs
- SortableBindingList.cs
- PageSettings.cs
- NameSpaceEvent.cs
- XmlSchemaComplexType.cs
- SerialStream.cs
- ISCIIEncoding.cs
- CommandEventArgs.cs
- SettingsPropertyValue.cs
- WebPartTransformer.cs
- UrlMappingsSection.cs
- ByteStack.cs
- HiddenFieldPageStatePersister.cs
- EditingMode.cs
- Automation.cs
- ResourceExpression.cs
- BaseProcessor.cs
- Debug.cs
- FacetChecker.cs
- ExpressionValueEditor.cs
- loginstatus.cs
- _ShellExpression.cs
- ListViewInsertedEventArgs.cs
- XmlNullResolver.cs
- AddInController.cs
- SafeNativeMethods.cs
- FontUnitConverter.cs
- EditorZoneAutoFormat.cs
- EndpointReference.cs
- MatrixCamera.cs
- DirectoryNotFoundException.cs
- MailMessageEventArgs.cs
- BaseUriHelper.cs
- SqlUtils.cs
- ZipIOExtraFieldZip64Element.cs
- TextComposition.cs
- CodeConstructor.cs
- WebPartPersonalization.cs
- ResourceDictionaryCollection.cs
- PackageStore.cs
- XmlSchemaException.cs
- HtmlInputPassword.cs
- DataGridViewRowEventArgs.cs
- SqlErrorCollection.cs
- PageAsyncTask.cs
- TextDecorationLocationValidation.cs
- ContentOperations.cs
- MultiViewDesigner.cs
- GeometryCollection.cs
- LogicalExpr.cs
- ListViewCancelEventArgs.cs
- CancelEventArgs.cs
- FixedPosition.cs
- ASCIIEncoding.cs
- NoPersistScope.cs
- Queue.cs
- SrgsSubset.cs
- AsyncStreamReader.cs
- Converter.cs
- UdpDuplexChannel.cs
- URLMembershipCondition.cs
- WindowsGrip.cs
- ConfigurationStrings.cs
- SettingsProperty.cs
- PeekCompletedEventArgs.cs
- ParsedAttributeCollection.cs
- DbDataRecord.cs
- SqlComparer.cs
- Context.cs
- PointUtil.cs
- JournalEntryStack.cs
- Int16.cs
- StrokeNodeData.cs
- DataControlButton.cs
- Help.cs
- DataGridViewCellValidatingEventArgs.cs
- RuleInfoComparer.cs