private void btnSearchByDateLimit_Click(object sender, RoutedEventArgs e)
{
DateTime startdate = DateTime.Parse(SearchDateFrom.Text).Date;
DateTime enddate = DateTime.Parse(SearchDateTo.Text).Date;
dgLeaveAproveReject.DataContext = leaveBLL.LeaveSearchByDateLimitBLL(EmployeeEntity.EmployeeID, startdate, enddate);
}