چگونه با entityFramework اطلاعاتی که به صورت master/detial هستند را ذخیره کنیم؟

[parvizwpf]

یک نمونه کد:

using (var dataRepository = this.dataRepositoryFactory.Create())

{

    if (Mode == "New")

    {

        Order newOrder = new Order();



        // This doesn't make sense. Either generate a random order number (e.g. a Guid), or just use the Order.Id as an order number, although I don't recommend it.

        int maxOrderNumber = dataRepository.Orders.Select(o => o.OrderNumber).DefaultIfEmpty(0).Max();

        maxOrderNumber++;



        newOrder.OrderNumber = maxOrderNumber;

        newOrder.Date = DateTime.ParseExact(txtOrderDate.Text, "dd/MM/yyyy", CultureInfo.InvariantCulture);

        newOrder.CustomerID = Convert.ToInt32(ddlCustomer.SelectedValue);

        newOrder.Status = 1;



        dataRepository.Orders.Add(newOrder);



        foreach (DataRow dt in dtOrderDetails.Rows)

        {

            OrderDetails newOrderDetails = new OrderDetails();

            newOrderDetails.OrderNumer = maxOrderNumber;

            newOrderDetails.ProductId = Convert.ToInt32(dt["ProductId"]);

            newOrderDetails.Quantity = Convert.ToInt32(dt["Quantity"]);



            newOrder.OrderDetails.Add(newOrderDetails);

        }



        myOrder = newOrder;

    }



    if (Mode == "Edit")

    {

        Order editedOrder = dataRepository.Orders.FirstOrDefault(o => o.Id == myOrder.Id);



        editedOrder.Date = DateTime.ParseExact(txtOrderDate.Text, "dd/MM/yyyy", CultureInfo.InvariantCulture);

        editedOrder.CustomerID = Convert.ToInt32(ddlCustomer.SelectedValue);

        editedOrder.OrderDetails.Clear();



        foreach (DataRow dt in dtOrderDetails.Rows)

        {

            OrderDetails editedOrderDetails = new OrderDetails();

            editedOrderDetails.OrderNumer = editedOrder.OrderNumber;

            editedOrderDetails.ProductId = Convert.ToInt32(dt["ProductId"]);

            editedOrderDetails.Quantity = Convert.ToInt32(dt["Quantity"]);



            editedOrder.OrderDetails.Add(editedOrderDetails);

        }

    }



    dataRepository.Save();

}