Code:
/ FXUpdate3074 / FXUpdate3074 / 1.1 / untmp / whidbey / QFE / ndp / fx / src / xsp / System / Web / UI / WebControls / DropDownList.cs / 3 / 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) { // 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. // Copyright (c) Microsoft Corporation. All rights reserved.Raises events for the ///control on post back.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- CorrelationManager.cs
- MediaElement.cs
- RequestQueryParser.cs
- DataGridViewControlCollection.cs
- TextWriterTraceListener.cs
- Suspend.cs
- KerberosTicketHashIdentifierClause.cs
- EventProvider.cs
- StringValidator.cs
- DataPagerFieldItem.cs
- EmissiveMaterial.cs
- ZipPackage.cs
- LocalizationComments.cs
- PlatformCulture.cs
- FusionWrap.cs
- X509ChainPolicy.cs
- HostedNamedPipeTransportManager.cs
- IsolatedStorageFilePermission.cs
- EnumUnknown.cs
- __Error.cs
- ScrollViewer.cs
- DelegatingChannelListener.cs
- SafeFreeMibTable.cs
- BamlWriter.cs
- WebPartVerbsEventArgs.cs
- TextBox.cs
- LifetimeServices.cs
- ColorTranslator.cs
- ProvidePropertyAttribute.cs
- ZipIOExtraFieldPaddingElement.cs
- ConfigXmlComment.cs
- ContentOperations.cs
- EncoderFallback.cs
- DocumentSchemaValidator.cs
- CngKeyBlobFormat.cs
- CultureInfoConverter.cs
- TemplateEditingService.cs
- ImageClickEventArgs.cs
- WebPartZoneAutoFormat.cs
- hwndwrapper.cs
- XmlTextReaderImplHelpers.cs
- HttpFileCollectionBase.cs
- TemplateXamlParser.cs
- TemplateBindingExtension.cs
- DataGridRowDetailsEventArgs.cs
- Adorner.cs
- PermissionSetEnumerator.cs
- _NtlmClient.cs
- IIS7WorkerRequest.cs
- PrivacyNoticeElement.cs
- WindowsRebar.cs
- BitmapEffectInputConnector.cs
- HtmlInputText.cs
- AnnotationObservableCollection.cs
- CodeDomSerializationProvider.cs
- SHA512.cs
- XmlSchemaDocumentation.cs
- InArgument.cs
- _KerberosClient.cs
- DefaultHttpHandler.cs
- WebBrowsableAttribute.cs
- ImmutableAssemblyCacheEntry.cs
- BitmapEffectOutputConnector.cs
- StackBuilderSink.cs
- SudsWriter.cs
- NonBatchDirectoryCompiler.cs
- VScrollProperties.cs
- HwndSource.cs
- ExpressionPrefixAttribute.cs
- SiteMapNode.cs
- BindableTemplateBuilder.cs
- DataViewListener.cs
- FormViewModeEventArgs.cs
- backend.cs
- SQLMoney.cs
- TypeDescriptionProvider.cs
- TransformPatternIdentifiers.cs
- TogglePattern.cs
- CompositionAdorner.cs
- HttpPostedFile.cs
- WindowsFormsHostAutomationPeer.cs
- Deflater.cs
- EventlogProvider.cs
- Input.cs
- UserControl.cs
- StylusPointProperties.cs
- CacheOutputQuery.cs
- ComboBoxAutomationPeer.cs
- SettingsPropertyValueCollection.cs
- TreeNodeStyle.cs
- ColumnWidthChangedEvent.cs
- AttributeCollection.cs
- EnumCodeDomSerializer.cs
- DataServiceKeyAttribute.cs
- AppDomainAttributes.cs
- CodeArrayIndexerExpression.cs
- SubpageParagraph.cs
- FontSizeConverter.cs
- ItemCheckedEvent.cs
- AssociatedControlConverter.cs