The WebPart I'm using is ASP.NET Web Part, and when the Web Part is minimized/maximized, the page will do FullPostback. So, to eliminate those flickers occured when a page is refreshed I used an update panel. To help you figure out my situation, I attached here my sample.

If I set the layout settings OnAfterInitialize client side events as you said, then I need to know the current view of the grid (PivotChart or Grid). How can I know this? When user click on buttons Grid/PivotChart, is there any event raised?

When I used an update panel, after click minimize/maximize on other web parts, the grid turns into no rows there.

Kindly advise.

Thanks a lot,
Van