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Apr 26, 2012 11:22 AM|LINK
Hi ValZ, not sure what you mean, do you mean after the page loads and you click a column to change the sort? if yes then that overieds the default sort and since out of the box the GridView does not support multi column search you will need to extend it
a little see
http://www.codeproject.com/Articles/14437/Extending-GridView-by-allowing-Multiple-Selections that may help.