Procedure: Uitgesteld laden uitschakelen

U kunt uitgestelde laadtijden uitschakelen door de instelling in te stellen DeferredLoadingEnabled op false. Zie Deferred versus Direct laden voor meer informatie.

Voorbeeld

Het volgende voorbeeld laat zien hoe u uitgesteld laden uitschakelt door DeferredLoadingEnabled in te stellen op false.

Northwnd db = new Northwnd(@"c:\northwnd.mdf");
db.DeferredLoadingEnabled = false;

DataLoadOptions ds = new DataLoadOptions();
ds.LoadWith<Customer>(c => c.Orders);
ds.LoadWith<Order>(o => o.OrderDetails);
db.LoadOptions = ds;

var custQuery =
    from cust in db.Customers
    where cust.City == "London"
    select cust;

foreach (Customer custObj in custQuery)
{
    Console.WriteLine($"Customer ID: {custObj.CustomerID}");
    foreach (Order ord in custObj.Orders)
    {
        Console.WriteLine($"\tOrder ID: {ord.OrderID}");
        foreach (OrderDetail detail in ord.OrderDetails)
        {
            Console.WriteLine($"\t\tProduct ID: {detail.ProductID}");
        }
    }
}

Dim db As New Northwnd("c:\northwnd.mdf")

db.DeferredLoadingEnabled = False

Dim ds As New DataLoadOptions()
ds.LoadWith(Function(c As Customer) c.Orders)
ds.LoadWith(Of Order)(Function(o) o.OrderDetails)
db.LoadOptions = ds

Dim custQuery = From cust In db.Customers _
                Where cust.City = "London" _
                Select cust

For Each custObj In custQuery
    Console.WriteLine("Customer ID: {0}", custObj.CustomerID)
    For Each ord In custObj.Orders
        Console.WriteLine(vbTab & "Order ID: {0}", ord.OrderID)
        For Each detail In ord.OrderDetails
            Console.WriteLine(vbTab & vbTab & "Product ID: {0}", _
                detail.ProductID)
        Next
    Next
Next

Zie ook

• Query Concepten
• Query's uitvoeren op de database