private void cboSuppliers_SelectedValueChanged(object sender, EventArgs e)
 {
     if (cboSuppliers.EditValue != null)
     {
         ReceiveDoc rec = new ReceiveDoc();
         DataTable dtRec = new DataTable();
         dtRec = rec.GetTransactionBySupplierId(Convert.ToInt32(cboStores.EditValue),
             Convert.ToInt32(cboSuppliers.EditValue));
         PopulateTransactions(dtRec);
     }
 }
 private void cboSupplier_EditValueChanged(object sender, EventArgs e)
 {
     if (cboSupplier.EditValue == null) return;
     var rec = new ReceiveDoc();
     DataTable dtRec = rec.GetTransactionBySupplierId(Convert.ToInt32(cboStores.EditValue),
                                                      Convert.ToInt32(cboSupplier.EditValue));
     gridReceives.DataSource = dtRec;
 }