I have a grid with a column using a custom summary. The calculation of this sumary is very slow. It is ok to be slow on first load. The problem is that when a scroll the grid, it seems that the paint event of the grid triggers the custom sumary again, and since it is really slow, it make the whole application slow as well.
Are there any options to configure the grid to make these calculations only once (when it is loaded) stead of every time it needs to paint?
The reported scenario can be resolved by Update and UpdateDisplayFrequency properties in the Grid. Because, the painting of the cell is delayed until gridGroupingControl.Update is called or until the time specified with GridGroupingControl.UpdateDisplayFrequency elapsed.