DeliveryRequirementsAttribute.TargetContract Property

Definition

Namespace:

System.ServiceModel

Assembly:

System.ServiceModel.dll

Gets or sets the type to which it applies.

public:
 property Type ^ TargetContract { Type ^ get(); void set(Type ^ value); };

public Type TargetContract { get; set; }

member this.TargetContract : Type with get, set

Public Property TargetContract As Type

Property Value

Type

The Type to which the attribute applies.

Examples

The following code example uses the DeliveryRequirementsAttribute attribute to instruct WCF to confirm at runtime that the actual binding does not support queued contracts but does support ordered messages. It also specifies the target contract to which this restriction should be applied.

using System;
using System.ServiceModel;

[ServiceContract]
interface ICalculatorService
{
    [OperationBehavior(TransactionAutoComplete = true)]
    int Add(int a, int b);

    [OperationContract]
    int Subtract(int a, int b);
}

[DeliveryRequirementsAttribute(
  QueuedDeliveryRequirements = QueuedDeliveryRequirementsMode.NotAllowed,
  RequireOrderedDelivery = true,
  TargetContract= typeof(ICalculatorService)
)]
class CalculatorService : ICalculatorService
{
    public int Add(int a, int b)
    {
        Console.WriteLine("Add called.");
        return a + b;
    }

    public int Subtract(int a, int b)
    {
        Console.WriteLine("Subtract called.");
        return a - b;
    }

    public int Multiply(int a, int b)
    {
        return a * b;
    }
}

Imports System.ServiceModel

<ServiceContract()> _
Public Interface ICalculatorService

    <OperationBehavior(TransactionAutoComplete:=True)> _
    Function Add(ByVal a As Integer, ByVal b As Integer) As Integer

    <OperationContract()> _
    Function Subtract(ByVal a As Integer, ByVal b As Integer) As Integer
End Interface

<DeliveryRequirementsAttribute( _
    QueuedDeliveryRequirements:=QueuedDeliveryRequirementsMode.NotAllowed, _
    RequireOrderedDelivery:=True, _
    TargetContract:=GetType(ICalculatorService) _
)> _
Class CalculatorService

    Public Function add(ByVal a As Integer, ByVal b As Integer) As Integer
        Console.WriteLine("Add called")
        Return a + b
    End Function

    Public Function Subtract(ByVal a As Integer, ByVal b As Integer) As Integer
        Console.WriteLine("Subtract called.")
        Return a - b
    End Function

    Public Function Multiply(ByVal a As Integer, ByVal b As Integer) As Integer
        Return a * b
    End Function
End Class

Remarks

A service class can implement any number of service contract interfaces. Use the TargetContract property to validate that endpoints with the TargetContract have bindings that support the requirements. This attribute can be used any number of times on the same class.