GridGroupingControl (3.2.1.0) - Eats Up 100% CPU Time!!!

Question

Hi!

We''ve got huge problems with the GridGroupingControl regarding cpu usage. We bind a DataTable that has a child relation to a GridGroupingControl:

DataTable dt = this.controller.GetQuoteBookTopLevel();
        this.gridGroupingControlMarketData.Engine.DataSource = dt;

There are up to 500 in the parent table and 1500  records in the child table and approx. 30 columns in both tables.

The application runs almost all the time on 100% cpu time but as soon as we drag the form off the screen and it doesn''t have to paint the grid anymore cpu time falls down to approx. 20%.

What could be the problem? What are we doing wrong?
Thank you for your help!

Kind regards,
Dan Roesch

Daniel Roesch · Answer

Hi!

Could the problem be that we have defined 5 keys in the parent table?

Kind regards,
Dan Roesch

Administrator · Answer

Dan,

is it possible for you to upload a sample that shows the problem? 

That would make it easy for me to understand what exactly is going on and I could check out couple of things to find out where the bottleneck is.

Do you have lots of ListChanged events coming in?

Thanks,
Stefan

>Hi!
>
>Could the problem be that we have defined 5 keys in the parent table?
>
>Kind regards,
>Dan Roesch