private void cboReceivingUnits_SelectedValueChanged(object sender, EventArgs e)
        {
            DataTable issGrid = (DataTable)issueGrid.DataSource;
            if (issGrid != null)
            {
                if (cboReceivingUnits.EditValue != null && issGrid.Rows.Count > 0)
                {
                    DateTime xx = dtIssueDate.Value;
                    dtIssueDate.Value = DateTime.Now;
                    dtIssueDate.CustomFormat = "MM/dd/yyyy";
                    DateTime dtCurrent = ConvertDate.DateConverter(dtIssueDate.Text);
                    dtIssueDate.Value = xx;

                    var iss = new IssueDoc();
                    var bal = new Balance();
                    int receivingUnit = Convert.ToInt32(cboReceivingUnits.EditValue);
                    var DUs = new ReceivingUnits();
                    DUs.LoadByPrimaryKey(receivingUnit);
                    double dumax = 0.5;
                    try
                    {
                        dumax = DUs.Max;
                    }
                    catch(Exception EX)
                    {

                    }

                    for (int i = 0; i < issGrid.Rows.Count; i++)
                    {
                        int itmId = Convert.ToInt32(issGrid.Rows[i]["ID"]);
                        int lastIssueQty = iss.GetDULastIssueQty(itmId, receivingUnit);
                        int lastDUSOH = iss.GetDULastSOH(itmId, receivingUnit);
                        issGrid.Rows[i]["MR Issue Qty"] = lastIssueQty;
                        issGrid.Rows[i]["MR DU SOH"] = lastDUSOH;
                        const int lstSOH = 0;
                        issGrid.Rows[i]["DU Remaining SOH"] = 0;
                        int yer = (dtCurrent.Month < 11) ? dtCurrent.Year : dtCurrent.Year - 1;
                        Int64 duAmc = bal.CalculateDUAMC(itmId, receivingUnit, dtCurrent.Month, dtCurrent.Year, lstSOH);
                        issGrid.Rows[i]["DU AMC"] = duAmc;
                        double recQty = (duAmc * dumax) - Convert.ToInt32(issGrid.Rows[i]["DU Remaining SOH"]);
                        issGrid.Rows[i]["Recommended Qty"] = ((recQty > 0) ? Convert.ToInt64(recQty) : 0);
                    }
                }
            }
        }