DataLoadOptions.LoadWith Method (LambdaExpression)
.NET Framework (current version)
Retrieves specified data related to the main target by using a lambda expression.
Assembly: System.Data.Linq (in System.Data.Linq.dll)
Parameters
- expression
-
Type:
System.Linq.Expressions.LambdaExpression
A lambda expression that identifies the related material.
In the following example, all the Orders for all the Customers who are located in London are retrieved when the query is executed. As a result, successive access to the Orders property on a Customer object does not trigger a new database query.
Dim db As New Northwnd("c:\northwnd.mdf") Dim dlo As DataLoadOptions = New DataLoadOptions() dlo.LoadWith(Of Customer)(Function(c As Customer) c.Orders) db.LoadOptions = dlo Dim londonCustomers = _ From cust In db.Customers _ Where cust.City = "London" _ Select cust For Each custObj In londonCustomers Console.WriteLine(custObj.CustomerID) Next
.NET Framework
Available since 3.5
Windows Phone Silverlight
Available since 7.1
Available since 3.5
Windows Phone Silverlight
Available since 7.1
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