Question

How To Get The Selected RadioButton Object From The RadioButtonList in the Event of SelectedIndexChanged ??

Well for more description

i need to catch the radiobutton selected in the radiobuttonlist to focus on it when the radiobuttonlist autopostback

Answer 1

void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)
{
    var script = string.Format("document.getElementById('{0}_{1}').focus();", RadioButtonList1.ClientID, RadioButtonList1.SelectedIndex);

    if (ScriptManager.GetCurrent(this) != null && ScriptManager.GetCurrent(this).IsInAsyncPostBack)
        ScriptManager.RegisterStartupScript(RadioButtonList1, typeof(RadioButtonList), Guid.NewGuid().ToString(), script, true);
    else
        ClientScript.RegisterStartupScript(typeof(RadioButtonList), Guid.NewGuid().ToString(), script, true);
}