Copying data from virtual grid - poor performance

[Administrator]

I''m using a virtual grid to display a large quantity of data. My code in QueryCellInfo has to parse some XML, create controls in each cell and set the cell text, and it takes 20-30 seconds to do all of this.

This is ok, but the problem comes when I select all the data in the grid and try to copy it (using ctrl-C). My application appears to hang at this point, and debugging shows that the QueryCellInfo code is being called. I would expect that at worst it would take another 20-30 seconds to do the copy, but instead I''m left waiting forever.

Any ideas what might be going on?
Thanks
Akash

[Administrator]

Hi Akash,

try handling the ClipboardCopy event. There you could access your data directly and copy them to the clipboard. After you copied the data to the clipboard set e.Handled = true and e.Result = true. This ensures the grid won''t handle the event itsself.

Also, make sure you set

grid.Model.CutPaste.ClipboardFlags = GridDragDropFlags.Text;

Stefan