Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / HtmlControls / HtmlInputRadioButton.cs / 1 / 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, ] [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] 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); } } }
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- TypeSystemHelpers.cs
- ConfigXmlWhitespace.cs
- LinkConverter.cs
- Wrapper.cs
- BasicViewGenerator.cs
- LocatorPart.cs
- XmlUtil.cs
- Component.cs
- FontFamily.cs
- ObjectIDGenerator.cs
- ResourceType.cs
- NativeRecognizer.cs
- AxisAngleRotation3D.cs
- EllipseGeometry.cs
- URLIdentityPermission.cs
- CompositeDataBoundControl.cs
- ObjectQueryProvider.cs
- ApplicationHost.cs
- If.cs
- HtmlEmptyTagControlBuilder.cs
- TraceSection.cs
- ConstraintCollection.cs
- CatalogPartCollection.cs
- ConfigXmlElement.cs
- XhtmlBasicPageAdapter.cs
- KeyboardDevice.cs
- ListBoxItemAutomationPeer.cs
- GridViewRowPresenter.cs
- Bezier.cs
- OperationResponse.cs
- ColumnHeaderConverter.cs
- XhtmlBasicObjectListAdapter.cs
- SafeRightsManagementSessionHandle.cs
- GridViewCancelEditEventArgs.cs
- recordstatescratchpad.cs
- EntitySqlQueryBuilder.cs
- COM2IProvidePropertyBuilderHandler.cs
- CodeConstructor.cs
- CapabilitiesPattern.cs
- ToolCreatedEventArgs.cs
- Authorization.cs
- FrameAutomationPeer.cs
- FileUpload.cs
- MatrixAnimationBase.cs
- cookiecontainer.cs
- AutomationPatternInfo.cs
- BitmapSourceSafeMILHandle.cs
- ExceptionRoutedEventArgs.cs
- WebPartZoneBase.cs
- ChtmlTextWriter.cs
- DataGridViewCell.cs
- DataGridViewButtonCell.cs
- safelink.cs
- Binding.cs
- SequentialUshortCollection.cs
- XmlDataSourceDesigner.cs
- NotSupportedException.cs
- DashStyle.cs
- _SSPIWrapper.cs
- PriorityBinding.cs
- VirtualizingStackPanel.cs
- BitmapSizeOptions.cs
- EventHandlerService.cs
- ServiceContractGenerationContext.cs
- ImageIndexConverter.cs
- ObjectDataSource.cs
- StringInfo.cs
- ManagedIStream.cs
- RadioButtonAutomationPeer.cs
- SoapProtocolReflector.cs
- WebPartsPersonalization.cs
- StringFreezingAttribute.cs
- SpeechRecognitionEngine.cs
- ExpressionBinding.cs
- ConfigUtil.cs
- SqlDependencyListener.cs
- DbTypeMap.cs
- ProjectedWrapper.cs
- InfoCardCryptoHelper.cs
- XmlMapping.cs
- AdCreatedEventArgs.cs
- RuleElement.cs
- RuntimeHelpers.cs
- SoapIgnoreAttribute.cs
- StorageRoot.cs
- UnmanagedMemoryStreamWrapper.cs
- BodyWriter.cs
- EventMappingSettingsCollection.cs
- UnsafeNativeMethods.cs
- RegexWriter.cs
- SafeProcessHandle.cs
- DefaultSerializationProviderAttribute.cs
- Effect.cs
- Win32PrintDialog.cs
- OutOfMemoryException.cs
- ReliabilityContractAttribute.cs
- JapaneseCalendar.cs
- PrintControllerWithStatusDialog.cs
- PassportAuthenticationModule.cs
- Process.cs