private void Attendance_Delete_Click(object sender, RoutedEventArgs e)
 {
     try
     {
         int AttendaceId = int.Parse(txtAId.Text);
         if (attendanceBLL.DeleteAttendanceBLL(AttendaceId, LoginEntity.UserID))
         {
             MessageBox.Show("Attendance Deleted Successfully!!");
             LoadGrid();
         }
         else
         {
             MessageBox.Show("Attendance Is Already Approved or Rejected. Cannot Delete!!!");
         }
     }
     catch (Exception ex)
     {
         MessageBox.Show("Attendance not deleted. Error is: " + ex);
     }
 }