How to: Retrieve Many Objects At Once

This article is relevant to entity models that utilize the deprecated Visual Studio integration of Telerik Data Access. The current documentation of the Data Access framework is available here.

You can retrieve many objects in one query by using LoadWith.

The following code uses the LoadWith method to retrieve both Customer and Order objects.

using (NorthwindDbContext dbContext = new NorthwindDbContext())
{
   Telerik.OpenAccess.FetchOptimization.FetchStrategy fetchStrategy = 
        new Telerik.OpenAccess.FetchOptimization.FetchStrategy();
   fetchStrategy.LoadWith<Customer>(c => c.Orders);
   dbContext.FetchStrategy = fetchStrategy;

   IQueryable<Customer> query = from c in dbContext.Customers
                                where c.Country == "Germany"
                                select c;

   foreach (Customer customer in query)
   {
       Console.WriteLine(customer.CustomerID);
       foreach (Order order in customer.Orders)
       {
           Console.WriteLine("\t{0}", order.OrderID);
       }
   }
}

Using dbContext As New NorthwindDbContext()
 Dim fetchStrategy As New Telerik.OpenAccess.FetchOptimization.FetchStrategy()
 fetchStrategy.LoadWith(Of Customer)(Function(c) c.Orders)
 dbContext.FetchStrategy = fetchStrategy

 Dim query As IQueryable(Of Customer) = From c In dbContext.Customers
                                        Where c.Country = "Germany"
                                        Select c

 For Each customer_Renamed As Customer In query
  Console.WriteLine(customer_Renamed.CustomerID)
  For Each order_Renamed As Order In customer_Renamed.Orders
   Console.WriteLine(vbTab & "{0}", order_Renamed.OrderID)
  Next order_Renamed
 Next customer_Renamed
End Using

How to: Retrieve Many Objects At Once

See Also