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DataLoadOptions.AssociateWith Method (LambdaExpression)

Filters the objects retrieved for a particular relationship.

Namespace:  System.Data.Linq
Assembly:  System.Data.Linq (in System.Data.Linq.dll)

public void AssociateWith(
	LambdaExpression expression
)

Parameters

expression
Type: System.Linq.Expressions.LambdaExpression

Identifies the query to be used on a particular one-to-many field or property. Note the following:

If the expression does not start with a field or property that represents a one-to-many relationship, an exception is thrown.

If an operator other than a valid operator appears in the expression, an exception is thrown. Valid operators are as follows:

Where

OrderBy

ThenBy

OrderByDescending

ThenByDescending

Take

Northwnd db = new Northwnd(@"c:\northwnd.mdf");
DataLoadOptions dlo = new DataLoadOptions();
dlo.AssociateWith<Customer>(c => c.Orders.Where(p => p.ShippedDate != DateTime.Today));
db.LoadOptions = dlo;
var custOrderQuery = 
    from cust in db.Customers
    where cust.City == "London" 
    select cust;

foreach (Customer custObj in custOrderQuery)
{
    Console.WriteLine(custObj.CustomerID);
    foreach (Order ord in custObj.Orders)
    {
        Console.WriteLine("\t {0}",ord.OrderDate);
    } 
}

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5

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