public PurchaseOrderController()
{
ItemDao = new ItemDao();
StockCardDao = new StockCardDao();
SupplierItemDao = new SupplierItemDao();
POBatchDao = new PoBatchDao();
StockReorder = new Dictionary <Item, List <SupplierItem> >();
PODao = new PurchaseOrderDao();
POItemDao = new PurchaseOrderItemDao();
}
