private void LoadGrid()
{
if (_employee.Role == "1")
{
HistoryDataGrid.ItemsSource = iLeaveRequestService.GetbyUser(_employee.Id);
}
else if (_employee.Role == "2")
{
HistoryDataGrid.ItemsSource = iLeaveRequestService.GetByManager();
}
else
{
HistoryDataGrid.ItemsSource = iLeaveRequestService.Get();
}
}