Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / UI / HtmlControls / HtmlInputRadioButton.cs / 1305376 / HtmlInputRadioButton.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* * HtmlInputRadioButton.cs * * Copyright (c) 2000 Microsoft Corporation */ namespace System.Web.UI.HtmlControls { using System.ComponentModel; using System; using System.Collections; using System.Collections.Specialized; using System.Web; using System.Web.UI; using System.Security.Permissions; ////// [ DefaultEvent("ServerChange"), SupportsEventValidation, ] public class HtmlInputRadioButton : HtmlInputControl, IPostBackDataHandler { private static readonly object EventServerChange = new object(); /* * Creates an intrinsic Html INPUT type=radio control. */ public HtmlInputRadioButton() : base("radio") { } /* * Checked property. */ ////// The ///class defines the methods, /// properties, and events for the HtmlInputRadio control. This class allows /// programmatic access to the HTML <input type= /// radio> /// element on the server. /// /// [ WebCategory("Default"), DefaultValue(""), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden) ] public bool Checked { get { string s = Attributes["checked"]; return((s != null) ? (s.Equals("checked")) : false); } set { if (value) Attributes["checked"] = "checked"; else Attributes["checked"] = null; } } ////// Gets or sets a value indicating whether a radio button is /// currently selected or not. /// ////// public override string Name { get { string s = Attributes["name"]; return ((s != null) ? s : String.Empty); } set { Attributes["name"] = MapStringAttributeToString(value); } } ////// Gets the value of the HTML /// Name attribute that will be rendered to the browser. /// ////// public override string Value { get { string val = base.Value; if (val.Length != 0) return val; val = ID; if (val != null) return val; // if specific value is not provided, use the UniqueID return UniqueID; } set { base.Value = value; } } // Value that gets rendered for the Name attribute internal override string RenderedNameAttribute { get { // For radio buttons, we must make the name unique, but can't just use the // UniqueID because all buttons in a group must have the same name. So // we replace the last part of the UniqueID with the group Name. string name = base.RenderedNameAttribute; string uid = UniqueID; int lastColon = uid.LastIndexOf(IdSeparator); if (lastColon >= 0) name = uid.Substring(0, lastColon+1) + name; return name; } } [ WebCategory("Action"), WebSysDescription(SR.Control_OnServerCheckChanged) ] public event EventHandler ServerChange { add { Events.AddHandler(EventServerChange, value); } remove { Events.RemoveHandler(EventServerChange, value); } } /* * This method is invoked just prior to rendering. */ ////// Gets or sets the contents of a text box. /// ////// /// protected internal override void OnPreRender(EventArgs e) { base.OnPreRender(e); if (Page != null && !Disabled) { Page.RegisterRequiresPostBack(this); Page.RegisterEnabledControl(this); } // if no change handler, no need to save posted property if (Events[EventServerChange] == null && !Disabled) { ViewState.SetItemDirty("checked",false); } } /* * Method used to raise the OnServerChange event. */ ////// protected virtual void OnServerChange(EventArgs e) { EventHandler handler = (EventHandler)Events[EventServerChange]; if (handler != null) handler(this, e); } ////// /// protected override void RenderAttributes(HtmlTextWriter writer) { if (Page != null) { Page.ClientScript.RegisterForEventValidation(Value, RenderedNameAttribute); } writer.WriteAttribute("value", Value); Attributes.Remove("value"); base.RenderAttributes(writer); } /* * Method of IPostBackDataHandler interface to process posted data. * RadioButton determines the posted radio group state. */ ////// /// bool IPostBackDataHandler.LoadPostData(string postDataKey, NameValueCollection postCollection) { return LoadPostData(postDataKey, postCollection); } ////// /// protected virtual bool LoadPostData(string postDataKey, NameValueCollection postCollection) { string postValue = postCollection[RenderedNameAttribute]; bool valueChanged = false; if ((postValue != null) && postValue.Equals(Value)) { if (Checked == false) { ValidateEvent(Value, RenderedNameAttribute); Checked = true; // only fire change event for RadioButton that is being checked valueChanged = true; } } else { if (Checked == true) { Checked = false; } } return valueChanged; } /* * Method of IPostBackDataHandler interface which is invoked whenever posted data * for a control has changed. RadioButton fires an OnServerChange event. */ ////// /// void IPostBackDataHandler.RaisePostDataChangedEvent() { RaisePostDataChangedEvent(); } ////// /// protected virtual void RaisePostDataChangedEvent() { OnServerChange(EventArgs.Empty); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- TextSegment.cs
- GeometryDrawing.cs
- XmlNotation.cs
- AutomationFocusChangedEventArgs.cs
- HttpServerVarsCollection.cs
- IncrementalReadDecoders.cs
- VScrollBar.cs
- SourceChangedEventArgs.cs
- WebBrowserProgressChangedEventHandler.cs
- HighlightVisual.cs
- EntityTypeEmitter.cs
- TCPListener.cs
- DataViewListener.cs
- ReferenceSchema.cs
- PatternMatchRules.cs
- DecoderNLS.cs
- HtmlInputImage.cs
- SoapFault.cs
- DynamicRendererThreadManager.cs
- LazyTextWriterCreator.cs
- XmlEnumAttribute.cs
- Utils.cs
- HttpServerProtocol.cs
- SafeProcessHandle.cs
- VirtualPath.cs
- NetSectionGroup.cs
- SemanticValue.cs
- ListControl.cs
- TreeViewCancelEvent.cs
- CodeNamespace.cs
- ConvertersCollection.cs
- RelationshipSet.cs
- ScheduleChanges.cs
- TransformProviderWrapper.cs
- ToolStripDesignerAvailabilityAttribute.cs
- ConfigurationManagerHelper.cs
- SQLConvert.cs
- PointKeyFrameCollection.cs
- VideoDrawing.cs
- xml.cs
- QilUnary.cs
- WrappedIUnknown.cs
- MultilineStringConverter.cs
- AssociationEndMember.cs
- MetadataItemCollectionFactory.cs
- ControlTemplate.cs
- Internal.cs
- CodeSnippetExpression.cs
- DeviceSpecificDesigner.cs
- SqlParameter.cs
- PropertyBuilder.cs
- Button.cs
- ParsedAttributeCollection.cs
- FixedSchema.cs
- DoubleAnimationUsingKeyFrames.cs
- NumberAction.cs
- DirectionalLight.cs
- HostingEnvironmentWrapper.cs
- securitycriticaldataformultiplegetandset.cs
- OpCellTreeNode.cs
- CallContext.cs
- RsaSecurityToken.cs
- DataSetMappper.cs
- CommonDialog.cs
- RoleGroup.cs
- TextParentUndoUnit.cs
- MatrixTransform.cs
- StatusBarDrawItemEvent.cs
- AudioFormatConverter.cs
- Hashtable.cs
- MobileUITypeEditor.cs
- AttachedPropertyMethodSelector.cs
- SecurityTokenContainer.cs
- WizardPanel.cs
- ParallelTimeline.cs
- FrameSecurityDescriptor.cs
- StaticSiteMapProvider.cs
- QuerySafeNavigator.cs
- DataExchangeServiceBinder.cs
- ReflectionUtil.cs
- HttpCachePolicyElement.cs
- SchemaElementDecl.cs
- TableLayoutColumnStyleCollection.cs
- PenContexts.cs
- PermissionSetEnumerator.cs
- ToolStripRendererSwitcher.cs
- MissingSatelliteAssemblyException.cs
- XPathException.cs
- Camera.cs
- GC.cs
- AddInToken.cs
- MatrixTransform3D.cs
- sqlstateclientmanager.cs
- BitmapEffect.cs
- QuerySafeNavigator.cs
- XmlSchemaType.cs
- DrawingGroupDrawingContext.cs
- TypeConverterValueSerializer.cs
- SmiMetaData.cs
- QilReference.cs