Hi Lokesh,
Please do the following from HTML:
<asp:ModalPopupExtender ID="mpeDemo" BehaviorID="mpebDemo" runat="server" TargetControlID="hylPopup"
PopupControlID="Panel1" BackgroundCssClass="popupwrapper_transparentbg" DropShadow="false"
RepositionMode="RepositionOnWindowScroll" PopupDragHandleControlID="pnlConnectDragHandle"
OkControlID="lbtnCancel" />
Please do the following from Server:
Button1_Click(object sender, EventArgs e)
{
mpeDemo.Show();
}
Please do let me know, if you have any doubt.
Please provide
Vote if this would be helpful to you.
Thanks,
Imdadhusen