Occurs when the hyperlink to sort a column is clicked, but before the System.Web.UI.WebControls.GridView control handles the sort operation.
The GridView.Sorting event is raised when the hyperlink to sort a column is clicked, but before the System.Web.UI.WebControls.GridView control handles the sort operation. This enables you to provide an event-handling method that performs a custom routine, such as canceling the sorting operation, whenever this event occurs.
A System.Web.UI.WebControls.GridViewSortEventArgs object is passed to the event-handling method, which enables you to determine the sort expression for the column and to indicate that the selection operation should be canceled. To cancel the selection operation, set the System.ComponentModel.CancelEventArgs.Cancel property of the System.Web.UI.WebControls.GridViewSortEventArgs object to true.
For information about how to programmatically initiate a sort operation, see the GridView.Sort(string, SortDirection) method.
For more information about handling events, see Consuming Events.