GroupName Property
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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; }
/** @property */
public String get_GroupName ()

/** @property */
public void set_GroupName (String value)

public function get GroupName () : String

public function set GroupName (value : String)

Not applicable.

Property Value

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 Introduction to ASP.NET Themes.

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"/>

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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