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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)

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 ASP.NET Themes and Skins Overview.

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

<%@ Page Language="C#" AutoEventWireup="True" %>
    <script language="C#" runat="server">
       void Button1_Click(Object sender, EventArgs e) {
          if (Radio3.GroupName == "RegularMenu") {
             Radio3.GroupName = "VegitarianMenu";
             Radio3.BackColor = System.Drawing.Color.LightGreen;
          else {
            Radio3.GroupName = "RegularMenu";
            Radio3.BackColor = System.Drawing.Color.Pink;
     <h3>Panel Example</h3>
     <form runat=server>
        <asp:Label id="Label1" BackColor="Pink" Text="RegularMenu" runat="server"/>
        <asp:Label id="Label2" BackColor="LightGreen" Text="VegitarianMenu" runat="server"/>
        <asp:RadioButton id="Radio1" GroupName="RegularMenu"
             Text="Beef" BackColor="Pink" runat="server"/>
        <asp:RadioButton id="Radio2" GroupName="RegularMenu"
             Text="Pork" BackColor="Pink" runat="server"/>
        <asp:RadioButton id="Radio3" GroupName="RegularMenu"
             Text="Fish" BackColor="Pink" runat="server"/>
        <asp:RadioButton id="Radio4" GroupName="VegitarianMenu"
             Text="Mushroom" BackColor="LightGreen" runat="server"/>
        <asp:RadioButton id="Radio5" GroupName="VegitarianMenu"
             Text="Tofu" BackColor="LightGreen" runat="server"/>
        <asp:Button id="Button1" OnClick="Button1_Click"
             Text="Regroup the radio buttons" runat="server"/>

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

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

.NET Framework

Supported in: 2.0, 1.1, 1.0