Ajax Popup Control Extender in Asp.net

.aspx

    <div>

    <h4>PopupControlExtenderh4>

    <asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">

      <ContentTemplate>

    <asp:TextBox ID="txtPopUp" runat="server">asp:TextBox>

   

    <asp:Panel ID="PanelPopUp" runat="server">

    <asp:RadioButtonList ID="rbtnList" runat="server" AutoPostBack="True" OnSelectedIndexChanged="rbtnList_SelectedIndexChanged">

    <asp:ListItem Value="A">Aurangabadasp:ListItem>

    <asp:ListItem Value="B">Banarasasp:ListItem>

    <asp:ListItem Value="AL">Allahabadasp:ListItem>

    <asp:ListItem Value="M">Mumbaiasp:ListItem>

    asp:RadioButtonList>

       asp:Panel>

    <myAjax:PopupControlExtender ID="PopupControlExtender1" runat="server" TargetControlID="txtPopUp" PopupControlID="PanelPopUp" CommitProperty="value" Position="Bottom">

        myAjax:PopupControlExtender>

         ContentTemplate>

    asp:UpdatePanel>

    div>

.aspx.cs

protected void rbtnList_SelectedIndexChanged(object sender, EventArgs e)

    {

        PopupControlExtender1.Commit(rbtnList.SelectedValue);

    }