public void grdActivity_DeleteCommand(object sender, DataGridCommandEventArgs e)
{
String activity_id = "";
activity_id = grdActivity.DataKeys[Convert.ToInt32(e.Item.ItemIndex)].ToString();
whitfield_reports _wRep = new whitfield_reports();
_wRep.DeleteProjectActivity(activity_id);
this.DisplayReportGrid();
DisplayHistoryGrid();
}