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RadioButton.GroupName Property

Gets or sets the name of the group that the radio button belongs to.

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

public virtual string GroupName { get; set; }
<asp:RadioButton GroupName="String" />

Property Value

Type: System.String
The name of the group that the radio button belongs to. The default is an empty string ("").

Use the GroupName property to specify a grouping of radio buttons to create a mutually exclusive set of controls. You can use the GroupName property when only one selection is possible from a list of available options.

When this property is set, only one RadioButton in the specified group can be selected at a time.

The value of this property is stored in view state.

This property cannot be set by themes or style sheet themes. For more information, see ThemeableAttribute and ASP.NET Themes and Skins.

The following code example illustrates how to set the GroupName property programmatically.

<%@ Page Language="C#" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
<html xmlns="" >
    <title>Panel Example</title>
<script language="C#" runat="server">

       void Button1_Click(Object sender, EventArgs e) {
          if (Radio3.GroupName == "RegularMenu") {
             Radio3.GroupName = "vegetarianMenu";
             Radio3.BackColor = System.Drawing.Color.LightGreen;
          else {
            Radio3.GroupName = "RegularMenu";
            Radio3.BackColor = System.Drawing.Color.Pink;


     <h3>Panel Example</h3>

     <form id="form1" runat="server">

        <asp:Label id="Label1" BackColor="Pink" Text="RegularMenu" runat="server"/>

        <asp:Label id="Label2" BackColor="LightGreen" Text="vegetarianMenu" runat="server"/>
        <br />

        <asp:RadioButton id="Radio1" GroupName="RegularMenu"
             Text="Beef" BackColor="Pink" runat="server"/>

        <br />
        <asp:RadioButton id="Radio2" GroupName="RegularMenu"
             Text="Pork" BackColor="Pink" runat="server"/>

        <br />
        <asp:RadioButton id="Radio3" GroupName="RegularMenu"
             Text="Fish" BackColor="Pink" runat="server"/>

        <br />
        <asp:RadioButton id="Radio4" GroupName="vegetarianMenu"
             Text="Mushroom" BackColor="LightGreen" runat="server"/>

        <br />
        <asp:RadioButton id="Radio5" GroupName="vegetarianMenu"
             Text="Tofu" BackColor="LightGreen" runat="server"/>

        <br />
        <asp:Button id="Button1" OnClick="Button1_Click"
             Text="Regroup the radio buttons" runat="server"/>



.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.