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RadioButton Controls tutorials

  • RadioButton Allows only a single option to be selected from a group



The syntax of radio button is:

<asp:RadioButton ID= "rdboption" runat= "Server"> </asp: RadioButton>

  • The properties of radio buttons is:




AutoPostBack Property

Specifies whether the form should be posted immediately after the Checked property has changed or not. Default is false

Checked Property

Checked property specifies whether the radio button is checked or not

Id Property

ID property id used to set the ID of Radio button control.

GroupName Property

The name of the group to which this radio button belongs

OnCheckedChanged Property

The name of the function to be executed when the Checked property has changed

Runat Property

Specifies that the control is a server control, Must be set to "server"

Text Property

Specifies the text name to the radio button

TextAlign Property

On which side of the radio button the text should appear (right or left)

Enabled Property

Enabled property enable the state of Radiobutton control.Initially its value is true.

Visible Property

Set the visibility of a  Radiobutton. If its value is true then  Radiobutton will be visible otherwise it will be hide for user.



  • From the below example, we have three RadioButton controls, one Button control, and one Label control in an RadioButtonControl.aspx file.

  • When the submit button is clicked, the submit subroutine is executed. The submit subroutine may respond in three ways: if the radiobutton with id="rdbbmw" is selected, the server sends the message "You selected BMW" to the Label control.

  • If the radiobutton with id="rdbtata" is selected, the server sends the message "You selected TATA" to the Label control.

  • If the radiobutton with id="rdbmaruti" is selected, the server sends the message "You selected Maruti" to the Label control.

RadioButtonControl.aspx.cs Code:


Following example shows the use of ASP.NET Basic Web Controls (RadioButton Controls):

Sam Sir


using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;


public partial class RadioButtonControl : System.Web.UI.Page


protected void Page_Load(object sender, EventArgs e)




protected void btnsubmit_Click(object sender, EventArgs e)


if (rdbbmw.Checked)


lblmsg.Text = " You have Selected your Favorite Car " + rdbbmw.Text;


else if (rdbtata.Checked)


lblmsg.Text = " You have Selected your Favorite Car " + rdbtata.Text;


else if(rdbmaruti.Checked)


lblmsg.Text = " You have Selected your Favorite Car " + rdbmaruti.Text;







RadioButtonControl.aspx Code:


Following example shows the use of ASP.NET Basic Web Controls (RadioButton Controls):

Sam Sir


<%@ Page Language="C#" AutoEventWireup="true" CodeFile="RadioButtonControl.aspx.cs" Inherits="RadioButtonControl" %>


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">


<html xmlns="">

<head runat="server">

<title>cbtSAM ASP.NET RadioButton Control Example</title>



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


Select your favorite Car:<br />

<asp:RadioButton ID="rdbbmw" runat="server" Text="BMW" GroupName="car" />

<br />

<asp:RadioButton ID="rdbtata" runat="server" Text="TATA" GroupName="car" />

<br />

<asp:RadioButton ID="rdbmaruti" runat="server" Text="Maruti" GroupName="car" />

<br />

<br />

<asp:Button ID="btnsubmit" runat="server" onclick="btnsubmit_Click"

Text="Submit" />

<br />

<br />

<asp:Label ID="lblmsg" runat="server"></asp:Label>





Output radiobutton control example


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