DeliveryRequirementsAttribute.TargetContract 属性

定义

命名空间:

System.ServiceModel

程序集:

System.ServiceModel.dll

获取或设置所适用的类型。

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

属性值

Type

属性适用的 Type。

示例

下面的代码示例使用 DeliveryRequirementsAttribute 属性指示 WCF 在运行时确认实际绑定不支持排队协定，但不支持有序消息。 也指定应该应用此限制的目标协定。

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

注解

服务类别可以实现任意数量的服务协定接口。 使用 TargetContract 属性可以验证具有 TargetContract 的终结点是否有支持需求的绑定。 此属性可以在同一类上多次使用。