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RadioButton Class

Represents a radio button control.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)

public class RadioButton : CheckBox, IPostBackDataHandler
public class RadioButton extends CheckBox implements IPostBackDataHandler
public class RadioButton extends CheckBox implements IPostBackDataHandler
Not applicable.

The RadioButton server control permits you to intersperse the radio buttons in a group with other content in the page. The buttons are grouped logically if they all share the same GroupName property.

NoteNote:

You can use the RadioButton control to display user input, which might include malicious client script. Check any information that is sent from a client for executable script, SQL statements, or other code before displaying it in your application. ASP.NET provides an input request validation feature to block script and HTML in user input. Validation server controls are also provided to assess user input. For more information, see Validation Server Controls.

Accessibility

The markup rendered by default for this control might not conform to accessibility standards such as the Web Content Accessibility Guidelines 1.0 (WCAG) priority 1 guidelines. For details about accessibility support for this control, see ASP.NET Controls and Accessibility.

TopicLocation
How to: Set Layout in a RadioButtonList Web Server ControlBuilding ASP .NET Web Applications
How to: Add RadioButtonList Web Server Controls to a Web Forms PageBuilding ASP .NET Web Applications
How to: Set and Get the Selection in a RadioButton Web Server ControlBuilding ASP .NET Web Applications
How to: Add Individual RadioButton Web Server Controls to a Web Forms PageBuilding ASP .NET Web Applications
How to: Set Focus on ASP.NET Web Server ControlsBuilding ASP .NET Web Applications
How to: Respond to a User Selection in a RadioButton Web Server Control GroupBuilding ASP .NET Web Applications
How to: Set Layout in a RadioButtonList Web Server ControlBuilding ASP .NET Web Applications
How to: Add RadioButtonList Web Server Controls to a Web Forms PageBuilding ASP .NET Web Applications
How to: Set and Get the Selection in a RadioButton Web Server ControlBuilding ASP .NET Web Applications
How to: Add Individual RadioButton Web Server Controls to a Web Forms PageBuilding ASP .NET Web Applications
How to: Set Focus on ASP.NET Web Server ControlsBuilding ASP .NET Web Applications
How to: Respond to a User Selection in a RadioButton Web Server Control GroupBuilding ASP .NET Web Applications
Walkthrough: Creating and Using ASP.NET Master Pages in Visual Web DeveloperBuilding ASP .NET Web Applications in Visual Studio
Walkthrough: Working with Cascading Style Sheet Styles in Visual Web DeveloperBuilding ASP .NET Web Applications in Visual Studio
How to: Add RadioButtonList Web Server Controls to a Web Forms Page (Visual Studio)Building ASP .NET Web Applications in Visual Studio
Walkthrough: Data Binding to a Custom Business ObjectBuilding ASP .NET Web Applications in Visual Studio
How to: Add RadioButton Web Server Controls to a Web Forms Page (Visual Studio)Building ASP .NET Web Applications in Visual Studio
Walkthrough: Using the ObjectDataSource with an XML File
How to: Add RadioButtonList Web Server Controls to a Web Forms PageBuilding ASP .NET Web Applications in Visual Studio
How to: Add RadioButtonList Web Server Controls to a Web Forms PageBuilding ASP .NET Web Applications in Visual Studio

The following code example illustrates how to use the RadioButton control.

<%@ Page Language="C#" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
 <head>
    <title>RadioButton Example</title>
<script language="C#" runat="server">
 
         void SubmitBtn_Click(Object Sender, EventArgs e) {
         
             if (Radio1.Checked) {
                 Label1.Text = "You selected " + Radio1.Text;
             }
             else if (Radio2.Checked) {
                 Label1.Text = "You selected " + Radio2.Text;
             }
             else if (Radio3.Checked) {
                 Label1.Text = "You selected " + Radio3.Text;
             }
         }
 
     </script>
 
 </head>
 <body>
 
     <h3>RadioButton Example</h3>
 
     <form id="form1" runat="server">
     
         <h4>Select the type of installation you want to perform:</h4>
     
         <asp:RadioButton id="Radio1" Text="Typical" Checked="True" GroupName="RadioGroup1" runat="server" /><br />
         
         This option installs the features most typically used.  <i>Requires 1.2 MB disk space.</i><br />
             
         <asp:RadioButton id="Radio2" Text="Compact" GroupName="RadioGroup1" runat="server"/><br />
         
         This option installs the minimum files required to run the product.  <i>Requires 350 KB disk space.</i><br />
          
         <asp:RadioButton id="Radio3" runat="server" Text="Full" GroupName="RadioGroup1" /><br />
         
         This option installs all features for the product.  <i>Requires 4.3 MB disk space.</i><br />
 
         <asp:button text="Submit" OnClick="SubmitBtn_Click" runat="server"/>
 
         <asp:Label id="Label1" font-bold="true" runat="server" />
             
     </form>
 
 </body>
 </html>
 

System.Object
   System.Web.UI.Control
     System.Web.UI.WebControls.WebControl
       System.Web.UI.WebControls.CheckBox
        System.Web.UI.WebControls.RadioButton

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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