Is there a way to show a loading panel when exporting grid data to excel? I know I cannot ajaxify the grid, export does not work, but I would like to show a loading panel during export because it can take up to 1 minute for my grid to export large amounts of data.
I am not sure about the loading panel, however one thing I did for my grid when exporting large amount of data is to update the text of a label on the page while processing the export (something like "Export in progress...").
On a second thought, what about showing an ajax loading panel explicitly hooking the onclick client event of the export button? Something similar to the approach presented here I suppose.