Hi Matthias,
Thank you for your interest in Syncfusion products.
Yes it is possible using “asp:UpdatePanel”. Place the “GridGroupingControl” inside an update panel and set the visible property of it to false. Now, update the UpdatePanel in “document.onload” client event. On Asynchronies postback, make the grid visible. Please refer the below code snippet to achieve this.
[JavaScript]
// To do update on UpdatePanel1.
window.onload = function() {
__doPostBack("UpdatePanel1", "");
}
[ASPX]
AutoFormat="Vista" Visible=”false”>
Let me know if you have any concerns.
Regards,
Bharath M