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 / DropDownList.cs / 1 / DropDownList.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls { using System; using System.Collections; using System.ComponentModel; using System.Collections.Specialized; using System.Drawing; using System.Web; using System.Web.UI; using System.Web.UI.WebControls.Adapters; using System.Security.Permissions; ////// [ SupportsEventValidation, ValidationProperty("SelectedItem") ] [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] public class DropDownList : ListControl, IPostBackDataHandler { ///Creates a control that allows the user to select a single item from a /// drop-down list. ////// public DropDownList() { } ///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; } } ///[To be supplied.] ////// [ WebCategory("Behavior"), DefaultValue(0), WebSysDescription(SR.WebControl_SelectedIndex), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden) ] public override int SelectedIndex { get { int selectedIndex = base.SelectedIndex; if (selectedIndex < 0 && Items.Count > 0) { Items[0].Selected = true; selectedIndex = 0; } return selectedIndex; } set { base.SelectedIndex = value; } } internal override ArrayList SelectedIndicesInternal { get { int sideEffect = SelectedIndex; return base.SelectedIndicesInternal; } } protected override void AddAttributesToRender(HtmlTextWriter writer) { string uniqueID = UniqueID; if (uniqueID != null) { writer.AddAttribute(HtmlTextWriterAttribute.Name, uniqueID); } base.AddAttributesToRender(writer); } protected override ControlCollection CreateControlCollection() { return new EmptyControlCollection(this); } ///Gets or sets the index of the item selected by the user /// from the ////// control. /// /// bool IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection) { return LoadPostData(postDataKey, postCollection); } ///Process posted data for the ///control. /// /// protected virtual bool LoadPostData(String postDataKey, NameValueCollection postCollection) { // When a DropDownList is disabled, then there is no postback data for it. // Since DropDownList doesn't call RegisterRequiresPostBack, this method will // never be called, so we don't need to worry about ignoring empty postback data. string [] selectedItems = postCollection.GetValues(postDataKey); EnsureDataBound(); if (selectedItems != null) { ValidateEvent(postDataKey, selectedItems[0]); int n = Items.FindByValueInternal(selectedItems[0], false); if (SelectedIndex != n) { SetPostDataSelection(n); return true; } } return false; } ///Process posted data for the ///control. /// /// void IPostBackDataHandler.RaisePostDataChangedEvent() { RaisePostDataChangedEvent(); } ///Raises events for the ///control on post back. /// /// protected virtual void RaisePostDataChangedEvent() { if (AutoPostBack && !Page.IsPostBackEventControlRegistered) { // VSWhidbey 204824 Page.AutoPostBackControl = this; if (CausesValidation) { Page.Validate(ValidationGroup); } } OnSelectedIndexChanged(EventArgs.Empty); } protected internal override void VerifyMultiSelect() { throw new HttpException(SR.GetString(SR.Cant_Multiselect, "DropDownList")); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //Raises events for the ///control on post back. // Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls { using System; using System.Collections; using System.ComponentModel; using System.Collections.Specialized; using System.Drawing; using System.Web; using System.Web.UI; using System.Web.UI.WebControls.Adapters; using System.Security.Permissions; ////// [ SupportsEventValidation, ValidationProperty("SelectedItem") ] [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] public class DropDownList : ListControl, IPostBackDataHandler { ///Creates a control that allows the user to select a single item from a /// drop-down list. ////// public DropDownList() { } ///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; } } ///[To be supplied.] ////// [ WebCategory("Behavior"), DefaultValue(0), WebSysDescription(SR.WebControl_SelectedIndex), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden) ] public override int SelectedIndex { get { int selectedIndex = base.SelectedIndex; if (selectedIndex < 0 && Items.Count > 0) { Items[0].Selected = true; selectedIndex = 0; } return selectedIndex; } set { base.SelectedIndex = value; } } internal override ArrayList SelectedIndicesInternal { get { int sideEffect = SelectedIndex; return base.SelectedIndicesInternal; } } protected override void AddAttributesToRender(HtmlTextWriter writer) { string uniqueID = UniqueID; if (uniqueID != null) { writer.AddAttribute(HtmlTextWriterAttribute.Name, uniqueID); } base.AddAttributesToRender(writer); } protected override ControlCollection CreateControlCollection() { return new EmptyControlCollection(this); } ///Gets or sets the index of the item selected by the user /// from the ////// control. /// /// bool IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection) { return LoadPostData(postDataKey, postCollection); } ///Process posted data for the ///control. /// /// protected virtual bool LoadPostData(String postDataKey, NameValueCollection postCollection) { // When a DropDownList is disabled, then there is no postback data for it. // Since DropDownList doesn't call RegisterRequiresPostBack, this method will // never be called, so we don't need to worry about ignoring empty postback data. string [] selectedItems = postCollection.GetValues(postDataKey); EnsureDataBound(); if (selectedItems != null) { ValidateEvent(postDataKey, selectedItems[0]); int n = Items.FindByValueInternal(selectedItems[0], false); if (SelectedIndex != n) { SetPostDataSelection(n); return true; } } return false; } ///Process posted data for the ///control. /// /// void IPostBackDataHandler.RaisePostDataChangedEvent() { RaisePostDataChangedEvent(); } ///Raises events for the ///control on post back. /// /// protected virtual void RaisePostDataChangedEvent() { if (AutoPostBack && !Page.IsPostBackEventControlRegistered) { // VSWhidbey 204824 Page.AutoPostBackControl = this; if (CausesValidation) { Page.Validate(ValidationGroup); } } OnSelectedIndexChanged(EventArgs.Empty); } protected internal override void VerifyMultiSelect() { throw new HttpException(SR.GetString(SR.Cant_Multiselect, "DropDownList")); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.Raises events for the ///control on post back.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- PropertyEmitter.cs
- AutomationProperties.cs
- DescendantBaseQuery.cs
- SizeLimitedCache.cs
- PixelFormatConverter.cs
- activationcontext.cs
- SubqueryRules.cs
- util.cs
- UIInitializationException.cs
- AnimationTimeline.cs
- ItemContainerPattern.cs
- AppearanceEditorPart.cs
- WindowsListView.cs
- PropertyGridView.cs
- RubberbandSelector.cs
- Selector.cs
- ISCIIEncoding.cs
- RectAnimationBase.cs
- SecurityToken.cs
- CustomCategoryAttribute.cs
- ProcessModelSection.cs
- Stacktrace.cs
- DynamicMethod.cs
- PermissionToken.cs
- JsonDeserializer.cs
- QilExpression.cs
- Vector3DCollection.cs
- QilTernary.cs
- WebPartUserCapability.cs
- recordstate.cs
- SqlVersion.cs
- ItemCollection.cs
- HashHelper.cs
- IriParsingElement.cs
- ObjectDataSourceSelectingEventArgs.cs
- PaintEvent.cs
- AddInContractAttribute.cs
- PageParserFilter.cs
- DesignerEventService.cs
- PriorityQueue.cs
- RemotingSurrogateSelector.cs
- CodeMemberProperty.cs
- QilPatternVisitor.cs
- Stylus.cs
- CodeDesigner.cs
- CodeTypeParameter.cs
- CodeAssignStatement.cs
- DataSourceHelper.cs
- DataGridRow.cs
- XamlPathDataSerializer.cs
- ProtocolImporter.cs
- Cloud.cs
- RequestSecurityTokenSerializer.cs
- MD5CryptoServiceProvider.cs
- QualificationDataItem.cs
- StorageMappingItemCollection.cs
- SQLBytes.cs
- TextEditorCharacters.cs
- Config.cs
- PropertyStore.cs
- DirectoryObjectSecurity.cs
- DataGridColumnHeadersPresenter.cs
- AutomationEvent.cs
- Lasso.cs
- CursorConverter.cs
- HttpCacheParams.cs
- DataGridColumnHeaderCollection.cs
- initElementDictionary.cs
- assemblycache.cs
- PriorityBindingExpression.cs
- ISCIIEncoding.cs
- FullTextState.cs
- SafeArrayRankMismatchException.cs
- DocumentsTrace.cs
- ServiceRoute.cs
- CallTemplateAction.cs
- Condition.cs
- DataMemberFieldEditor.cs
- AuthenticationManager.cs
- ComAdminInterfaces.cs
- RootBuilder.cs
- Image.cs
- UTF8Encoding.cs
- SafeNativeMethods.cs
- LicenseManager.cs
- CrossContextChannel.cs
- ActiveXSite.cs
- XmlQueryStaticData.cs
- CompoundFileIOPermission.cs
- GridViewColumnHeader.cs
- StylusLogic.cs
- BidOverLoads.cs
- TextProperties.cs
- SchemaAttDef.cs
- SqlMethods.cs
- IsolatedStoragePermission.cs
- GAC.cs
- DataGridViewRowsAddedEventArgs.cs
- InvalidateEvent.cs
- ExecutionContext.cs