MessageContractAttribute 类

定义

命名空间:

System.ServiceModel

程序集:

System.ServiceModel.Primitives.dll

包:

System.ServiceModel.Primitives v6.2.0

Source:

MessageContractAttribute.cs

定义与 SOAP 消息相对应的强类型类。

public ref class MessageContractAttribute sealed : Attribute

[System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct, AllowMultiple=false)]
public sealed class MessageContractAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct, AllowMultiple=false)>]
type MessageContractAttribute = class
    inherit Attribute

Public NotInheritable Class MessageContractAttribute
Inherits Attribute

继承

Object

Attribute

MessageContractAttribute

属性

AttributeUsageAttribute

示例

下面的代码示例演示如何使用 MessageContractAttribute 来控制请求消息和响应消息的 SOAP 信封结构，以及如何使用 MessageHeaderAttribute（创建响应消息的 SOAP 标头）和 MessageBodyMemberAttribute（指定请求消息和响应消息的正文）。 此代码示例包含发送时的每个消息的示例。

using System;
using System.Collections.Generic;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Channels;

namespace Microsoft.WCF.Documentation
{
  [ServiceContract(Namespace = "Microsoft.WCF.Documentation")]
  interface IMessagingHello
  {
    [OperationContract(
     Action = "http://GreetingMessage/Action",
     ReplyAction = "http://HelloResponseMessage/Action"
    )]
    HelloResponseMessage Hello(HelloGreetingMessage msg);
  }

  [MessageContract]
  public class HelloResponseMessage
  {
    private string localResponse = String.Empty;
    private string extra = String.Empty;

    [MessageBodyMember(
      Name = "ResponseToGreeting",
      Namespace = "http://www.examples.com")]
    public string Response
    {
      get { return localResponse; }
      set { localResponse = value; }
    }

    [MessageHeader(
      Name = "OutOfBandData",
      Namespace = "http://www.examples.com",
      MustUnderstand=true
    )]
    public string ExtraValues
    {
      get { return extra; }
      set { this.extra = value; }
   }

   /*
    The following is the response message, edited for clarity.

    <s:Envelope>
      <s:Header>
        <a:Action s:mustUnderstand="1">http://HelloResponseMessage/Action</a:Action>
        <h:OutOfBandData s:mustUnderstand="1" xmlns:h="http://www.examples.com">Served by object 13804354.</h:OutOfBandData>
      </s:Header>
      <s:Body>
        <HelloResponseMessage xmlns="Microsoft.WCF.Documentation">
          <ResponseToGreeting xmlns="http://www.examples.com">Service received: Hello.</ResponseToGreeting>
        </HelloResponseMessage>
      </s:Body>
    </s:Envelope>
    */
 }
  [MessageContract]
  public class HelloGreetingMessage
  {
    private string localGreeting;

    [MessageBodyMember(
      Name = "Salutations",
      Namespace = "http://www.examples.com"
    )]
    public string Greeting
    {
      get { return localGreeting; }
      set { localGreeting = value; }
    }
  }

  /*
   The following is the request message, edited for clarity.

    <s:Envelope>
      <s:Header>
        <!-- Note: Some header content has been removed for clarity.
        <a:Action>http://GreetingMessage/Action</a:Action>
        <a:To s:mustUnderstand="1"></a:To>
      </s:Header>
      <s:Body u:Id="_0" xmlns:u="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
        <HelloGreetingMessage xmlns="Microsoft.WCF.Documentation">
          <Salutations xmlns="http://www.examples.com">Hello.</Salutations>
        </HelloGreetingMessage>
      </s:Body>
   </s:Envelope>
   */

  class MessagingHello : IMessagingHello
  {
    public HelloResponseMessage Hello(HelloGreetingMessage msg)
    {
      Console.WriteLine("Caller sent: " + msg.Greeting);
      HelloResponseMessage responseMsg = new HelloResponseMessage();
      responseMsg.Response = "Service received: " + msg.Greeting;
      responseMsg.ExtraValues = String.Format("Served by object {0}.", this.GetHashCode().ToString());
      Console.WriteLine("Returned response message.");
      return responseMsg;
    }
  }
}

Imports System.Runtime.Serialization
Imports System.ServiceModel
Imports System.ServiceModel.Channels

Namespace Microsoft.WCF.Documentation
  <ServiceContract(Namespace := "Microsoft.WCF.Documentation")> _
  Friend Interface IMessagingHello
    <OperationContract(Action := "http://GreetingMessage/Action", ReplyAction := "http://HelloResponseMessage/Action")> _
    Function Hello(ByVal msg As HelloGreetingMessage) As HelloResponseMessage
  End Interface

  <MessageContract> _
  Public Class HelloResponseMessage
    Private localResponse As String = String.Empty
    Private extra As String = String.Empty

    <MessageBodyMember(Name := "ResponseToGreeting", Namespace := "http://www.examples.com")> _
    Public Property Response() As String
      Get
          Return localResponse
      End Get
      Set(ByVal value As String)
          localResponse = value
      End Set
    End Property

    <MessageHeader(Name := "OutOfBandData", Namespace := "http://www.examples.com", MustUnderstand:=True)> _
    Public Property ExtraValues() As String
      Get
          Return extra
      End Get
      Set(ByVal value As String)
          Me.extra = value
      End Set
    End Property

'   
'    The following is the response message, edited for clarity.
'    
'    <s:Envelope>
'      <s:Header>
'        <a:Action s:mustUnderstand="1">http://HelloResponseMessage/Action</a:Action>
'        <h:OutOfBandData s:mustUnderstand="1" xmlns:h="http://www.examples.com">Served by object 13804354.</h:OutOfBandData>
'      </s:Header>
'      <s:Body>
'        <HelloResponseMessage xmlns="Microsoft.WCF.Documentation">
'          <ResponseToGreeting xmlns="http://www.examples.com">Service received: Hello.</ResponseToGreeting>
'      </s:Body>    
'    </s:Envelope>
'    
  End Class
  <MessageContract> _
  Public Class HelloGreetingMessage
    Private localGreeting As String

    <MessageBodyMember(Name := "Salutations", Namespace := "http://www.examples.com")> _
    Public Property Greeting() As String
      Get
          Return localGreeting
      End Get
      Set(ByVal value As String)
          localGreeting = value
      End Set
    End Property
  End Class

'  
'   The following is the request message, edited for clarity.
'    
'    <s:Envelope>
'      <s:Header>
'        <!-- Note: Some header content has been removed for clarity.
'        <a:Action>http://GreetingMessage/Action</a:Action> 
'        <a:To s:mustUnderstand="1"></a:To>
'      </s:Header>
'      <s:Body u:Id="_0" xmlns:u="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
'        <HelloGreetingMessage xmlns="Microsoft.WCF.Documentation">
'          <Salutations xmlns="http://www.examples.com">Hello.</Salutations>
'      </s:Body>
'   </s:Envelope>
'   

  Friend Class MessagingHello
      Implements IMessagingHello
    Public Function Hello(ByVal msg As HelloGreetingMessage) As HelloResponseMessage Implements IMessagingHello.Hello
      Console.WriteLine("Caller sent: " & msg.Greeting)
      Dim responseMsg As New HelloResponseMessage()
      responseMsg.Response = "Service received: " & msg.Greeting
      responseMsg.ExtraValues = String.Format("Served by object {0}.", Me.GetHashCode().ToString())
      Console.WriteLine("Returned response message.")
      Return responseMsg
    End Function
  End Class
End Namespace

注解

使用 MessageContractAttribute 属性为特定消息指定 SOAP 信封的结构。 然后服务就可以在服务操作中使用消息作为参数或返回类型。 有关在不修改默认 SOAP 信封的情况下控制 SOAP 正文内容的序列化的信息，请参阅 System.Runtime.Serialization.DataContractAttribute、 在服务协定中指定数据传输和使用 数据协定。

注意

您不能在具有常规可序列化参数的服务操作中使用自定义消息类型。 使用自定义消息类型或序列化参数，该参数不是 Message 对象。 有关详细信息，请参阅 、 在服务协定中指定数据传输。

要针对某一类型实施消息协定，请使用 MessageContractAttribute 对其进行批注，并使用 MessageBodyMemberAttribute、MessageHeaderAttribute 或 MessageHeaderArrayAttribute 对一个或多个类的字段或属性进行批注。

注意

System.ServiceModel.MessageParameterAttribute 不是消息协定属性，不能与 MessageContractAttribute一起使用。

使用 Action 和 ReplyAction 属性来指定 SOAP 消息中 <Action> 元素的值。

• 使用 HasProtectionLevel 和 ProtectionLevel 属性来指示 SOAP 消息类型使用拥有保护级别，如果有，该保护级别是什么。

• 使用 IsWrapped 属性来指示消息正文是否有包装元素，如果有，请使用 WrapperName 和 WrapperNamespace 属性分别指定包装元素的名称和命名空间。

有关详细信息，请参阅使用消息协定。

构造函数

MessageContractAttribute()

初始化 MessageContractAttribute 类的新实例。

属性

HasProtectionLevel	获取一个值，该值指示消息是否有保护级别。
IsWrapped	获取或设置一个值，该值指定消息正文是否有包装元素。
ProtectionLevel	获取或设置一个值，该值指定是否对消息进行加密、签名或同时执行这两种操作。
TypeId	在派生类中实现时，获取此 Attribute 的唯一标识符。 (继承自 Attribute)
WrapperName	获取或设置消息正文的包装元素名称。
WrapperNamespace	获取或设置消息正文包装元素的命名空间。

方法

Equals(Object)	返回一个值，该值指示此实例是否与指定的对象相等。 (继承自 Attribute)
GetHashCode()	返回此实例的哈希代码。 (继承自 Attribute)
GetType()	获取当前实例的 Type。 (继承自 Object)
IsDefaultAttribute()	在派生类中重写时，指示此实例的值是否是派生类的默认值。 (继承自 Attribute)
Match(Object)	当在派生类中重写时，返回一个指示此实例是否等于指定对象的值。 (继承自 Attribute)
MemberwiseClone()	创建当前 Object 的浅表副本。 (继承自 Object)
ToString()	返回表示当前对象的字符串。 (继承自 Object)