RadioButton Control
Radio button allows the user to choose only one of a predefined set of options. When a user clicks on a radio button, it becomes checked, and all other radio buttons with same group become unchecked. The buttons are grouped logically if they all share the same GroupName property.
VB.Net
RadioButton1.Checked = True
C#
RadioButton1.Checked = true;
Use a radio button when you want the user to choose only one option. When you want the user to choose all appropriate options, use a check box.
The following ASP.NET program gives three option button to select. When the user select any option button , the label control displays the which option button is selected.
Default.aspx
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:RadioButton ID="RadioButton1" GroupName="language" runat="server" Text="ASP.NET" /><br />
<asp:RadioButton ID="RadioButton2" GroupName="language" runat="server" Text="VB.NET" /><br />
<asp:RadioButton ID="RadioButton3" GroupName="language" runat="server" Text="C#" /><br />
<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" /><br />
<asp:Label ID="Label1" runat="server" Text="Label1"></asp:Label>
</div>
</form>
</body>
</html>
Full Source | C#
using System;
public partial class _Default : System.Web.UI.Page
{
protected void Button1_Click(object sender, EventArgs e)
{
if (RadioButton1.Checked == true)
{
Label1.Text = "You selected : ASP.NET";
}
else if (RadioButton2.Checked == true )
{
Label1.Text = "You selected : VB.NET";
}
else if (RadioButton3.Checked == true)
{
Label1.Text = "You selected : C#";
}
else
{
Label1.Text = "";
}
}
}
Full Source | VB.NET
Partial Class _Default
Inherits System.Web.UI.Page
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
If RadioButton1.Checked = True Then
Label1.Text = "You selected : ASP.NET"
ElseIf RadioButton2.Checked = True Then
Label1.Text = "You selected : VB.NET"
ElseIf RadioButton3.Checked = True Then
Label1.Text = "You selected : C#"
End If
End Sub
End Class
Click the following links to see full source code
C# Source Code
VB.NET Source Code
Related Topics