public ChartService(IItemPurchaseOrderRepository itemPurchaseOrderContext, IInventoryRepository inventoryContext, IItemRepository itemContext, IItemRequisitionRepository itemRequisitionContext)
 {
     this.itemContext              = itemContext;
     this.inventoryContext         = inventoryContext;
     this.itemPurchaseOrderContext = itemPurchaseOrderContext;
     this.itemRequisitionContext   = itemRequisitionContext;
 }
 public ItemPurchaseOrderService(IItemPurchaseOrderRepository itemPurchaseOrderContext)
 {
     this.itemPurchaseOrderContext = itemPurchaseOrderContext;
 }