void cbSparepartGv_EditValueChanged(object sender, EventArgs e)
 {
     DevExpress.XtraEditors.LookUpEdit lookup = sender as DevExpress.XtraEditors.LookUpEdit;
     if (_presenter.IsSparepartSpecial(lookup.EditValue.AsInteger()))
     {
         this.SelectedPurchasingDetail.IsSpecialSparepart = true;
         this.SelectedPurchasingDetail.Qty         = 1;
         this.SelectedPurchasingDetail.SparepartId = lookup.EditValue.AsInteger();
     }
     else
     {
         this.SelectedPurchasingDetail.Qty = 0;
         this.SelectedPurchasingDetail.IsSpecialSparepart = false;
     }
 }