private void cboReasons_EditValueChanged(object sender, EventArgs e) { if (cboStores.EditValue != null && cboReasons.EditValue != null) { var adj = new Disposal(); dtRec = adj.GetTransactionByReason(Convert.ToInt32(cboStores.EditValue), Convert.ToInt32(cboReasons.EditValue)); //PopulateDocuments(dtRec); gridAdjustments.DataSource = dtRec; } }