<form id="form1" runat="server">
<div>
<asp:RadioButton ID="RadioButton1" runat="server" GroupName="Panel" Text="Radio 1"
AutoPostBack="True" oncheckedchanged="RadioButton1_CheckedChanged" />
<asp:RadioButton ID="RadioButton2" runat="server" GroupName="Panel" Text="Radio 2"
AutoPostBack="True" oncheckedchanged="RadioButton2_CheckedChanged" />
<asp:Panel ID="Panel1" runat="server">
</asp:Panel>
<br />
<asp:Panel ID="Panel2" runat="server">
</asp:Panel>
</div>
</form>
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
RadioButton1.Checked = true;
Panel1.Visible = true;
Panel2.Visible = false;
}
}
protected void RadioButton1_CheckedChanged(object sender, EventArgs e)
{
Panel2.Visible = false;
Panel1.Visible = true;
}
protected void RadioButton2_CheckedChanged(object sender, EventArgs e)
{
Panel2.Visible = true;
Panel1.Visible = false;
}