RowDeleting Occurs when a row's Delete button is clicked, but before the GridView control deletes the row.
RowDeleted Occurs when a row's Delete button is clicked, but after the GridView control deletes the row.
PageIndexChanging Occurs when one of the pager buttons is clicked, but before the GridView control handles the paging operation.
PageIndexChanged Occurs when one of the pager buttons is clicked, but after the GridView control handles the paging operation.
ref:
http://msdn.microsoft.com/en-us/library/hf8xwy0t.aspx[
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