ServiceContractAttribute.CallbackContract Property

Property Value

Type: System.Type
A Type that indicates the callback contract. The default is nulla null reference (Nothing in Visual Basic).

    'The following code contains an example of a duplex contract that contains a callback contract.
    <ServiceContract(Name := "SampleContract", Namespace := "Silverlight", CallbackContract := GetType(IDuplexClient))> _
    Public Interface IDuplexService
        <OperationContract(IsOneWay := True)> _
        Sub Order(ByVal name As String, ByVal quantity As Integer)
    End Interface

    <ServiceContract> _
    Public Interface IDuplexClient
        <OperationContract(IsOneWay := True)> _
        Sub Receive(ByVal order As Order)
    End Interface

//The following code contains an example of a duplex contract that contains a callback contract.
[ServiceContract(
    Name = "SampleContract", 
    Namespace = "Silverlight", 
    CallbackContract = typeof(IDuplexClient))]
public interface IDuplexService
{
    [OperationContract(IsOneWay = true)]
    void Order(string name, int quantity);
}

[ServiceContract]
public interface IDuplexClient
{
    [OperationContract(IsOneWay = true)]
    void Receive(Order order);
}