private void InitialiazeIssuanceEntry(string requestReferenceNumber)
        {
            RequisitionManager rManager = new RequisitionManager();
            ItemManager itemManager = new ItemManager();
            var items = rManager.FetchAll()
                .Where(r => r.ReferenceNumber.Equals(requestReferenceNumber)
                    && !r.Status.Equals(Transaction.TransactionStatus.Completed.ToString()));

            decimal totalAmount =
                (from p in items let item = itemManager.FetchById(p.ItemId) select item.LastSellingPrice*p.QuantityIssued).Sum();
            txtTotalAmount.Text = totalAmount.ToString("##0.00");

            ItemClassificationManager classificationManager = new ItemClassificationManager();
            ItemTypeManager itManager = new ItemTypeManager();
            UnitManager uManager = new UnitManager();
            List<RequestItem> requesItems = (from ri in items
                let classification = classificationManager.FetchById(ri.ItemClassificationId)
                let department = _dManager.FetchById(ri.DepartmentId)
                let item = itemManager.FetchById(ri.ItemId)
                let type = itManager.FetchById(item.TypeId)
                let unit = uManager.FetchById(ri.UnitId)
                select new RequestItem
                {
                    Barcode = ri.BarCode,
                    ClassificationName = classification.ClassificationName,
                    ClassificationId = classification.Id,
                    DepartmentId = department.Id,
                    DepartmentName = department.Description,
                    ItemCode = item.ItemCode,
                    ItemId = item.Id,
                    ItemName = item.ItemName,
                    ReferenceNumber = ri.ReferenceNumber,
                    RequestDate = ri.RequisitionDate,
                    RequestTo = ri.DepartmentId,
                    TypeId = type.Id,
                    TypeName = type.ItemDesciption,
                    UnitName = unit.Description,
                    UnitId = unit.Id,
                    Uid = ri.UniqueId,
                    Quantity = ri.QuantityIssued,
                    RequesitionId = ri.Id,
                    ItemPrice = item.LastSellingPrice,
                    ReceivedQuantity = ri.QuantityReceived,
                    IssuedQuantity = ri.QuantityIssued
                }).ToList();

            Session["REQUEST_ITEMS"] = requesItems;
            gvSelectedItems.DataSource = requesItems;
            gvSelectedItems.DataBind();

            if (requesItems.Count>0)
            {
                divMessageBox.Visible = true;
                divMessageBox.Attributes.Add("class", "notify info");
                ltrlMessageHeader.Text = "Search Result!";
                ltrlMessage.Text = "(" + requesItems.Count + ") Requistion detail found!";
                btnSubmitIssuance.Enabled = true;
            }
            else
            {
                divMessageBox.Visible = true;
                divMessageBox.Attributes.Add("class", "notify warning");
                ltrlMessageHeader.Text = "Search Result!";
                ltrlMessage.Text = "No Requistion found!";
                btnSubmitIssuance.Enabled = false;
            }
        }
        private void InitialiazeIssuanceDetails()
        {
            ItemManager itemManager = new ItemManager();
            var items = _issuanceDetailManager.FetchAll(IssuanceId);
            txtTotalAmount.Text = Issuance.TotalAmount.ToString("##0.00");
            ItemClassificationManager classificationManager = new ItemClassificationManager();
            UnitManager uManager = new UnitManager();
            List<RequestItem> requesItems = (from ri in items
                                             let item = itemManager.FetchById(ri.ItemId)
                                             let classification = classificationManager.FetchById(item.ClassificationId)
                                             let unit = uManager.FetchById(ri.UnitId)
                                             let request = _requisitionManager.FetchById(ri.RequisitionId)
                                             select new RequestItem
                                             {
                                                 Barcode = ri.Barcode,
                                                 ClassificationName = classification.ClassificationName,
                                                 ClassificationId = classification.Id,
                                                 DepartmentId = Issuance.DepartmentId,
                                                 DepartmentName = Issuance.IssuedTo,
                                                 ItemCode = item.ItemCode,
                                                 ItemId = item.Id,
                                                 ItemName = item.ItemName,
                                                 ReferenceNumber = Issuance.ReferenceNumber,
                                                 UnitName = unit.Description,
                                                 UnitId = unit.Id,
                                                 Uid = ri.Uid,
                                                 Quantity = ri.Quantity,
                                                 RequesitionId = ri.RequisitionId,
                                                 ItemPrice = ri.Price,
                                                 ReceivedQuantity = request.QuantityReceived,
                                                 IssuedQuantity = request.QuantityIssued
                                             }).ToList();

            gvSelectedItems.DataSource = requesItems;
            gvSelectedItems.DataBind();

            if (requesItems.Count <= 0)
            {
                divMessageBox.Visible = true;
                divMessageBox.Attributes.Add("class", "notify warning");
                ltrlMessageHeader.Text = "Issuance!";
                ltrlMessage.Text = "No Requistion found!";
                btnSubmitIssuance.Enabled = false;
            }
        }