Henk, not quite.  The Guid would be different for each postback, recreating the original problem.  Emptycan's solution works because his code will recreate the exact same IDs on each postback.

-Jason 

henk

Hi all!

emptycan, thank you very much! Your solution is excellent!

If you don't want use additional variables, you can do this:

protected void SomeGridView_RowDataBound(object sender, GridViewRowEventArgs e)
{

e.Row.ID = Guid.NewGuid().ToString();

}