MessageContractAttribute Třída

Definice

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)]
public sealed class MessageContractAttribute : Attribute

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

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

Public NotInheritable Class MessageContractAttribute
Inherits Attribute

Dědičnost

Object

Attribute

MessageContractAttribute

Atributy

AttributeUsageAttribute

Příklady

Následující příklad kódu ukazuje použití MessageContractAttribute k řízení struktury obálky SOAP pro zprávu požadavku i zprávu odpovědi a použití MessageHeaderAttribute obou (k vytvoření hlavičky SOAP pro zprávu odpovědi) a MessageBodyMemberAttribute (k určení těla žádosti i zprávy odpovědi). Příklad kódu obsahuje příklad každé zprávy při odeslání.

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

Poznámky

Pomocí atributu MessageContractAttribute určete strukturu obálky SOAP pro určitou zprávu. Služba pak může zprávu použít jako parametr nebo návratový typ v operacích služby. Informace o řízení serializace obsahu těla SOAP bez změny výchozí obálky SOAP samotné, viz , System.Runtime.Serialization.DataContractAttributeUrčení přenosu dat v kontraktech služeb a použití kontraktů dat.

Chcete-li implementovat kontrakt zprávy pro typ, označte ho poznámkami MessageContractAttribute a označte jedno nebo více polí nebo vlastností třídy pomocí MessageBodyMemberAttribute, nebo MessageHeaderAttributeMessageHeaderArrayAttribute.

Action Pomocí vlastností zadejte ReplyAction hodnotu elementu <Action> ve zprávě SOAP.

• HasProtectionLevel Pomocí vlastností určeteProtectionLevel, jestli má typ zprávy SOAP úroveň ochrany, a pokud ano, co je.

• IsWrapped Pomocí vlastnosti určete, zda text zprávy má obálkový element, a pokud ano, použijte WrapperName a WrapperNamespace vlastnosti k zadání názvu a oboru názvů v uvedeném pořadí, zabalení elementu.

Další informace naleznete v tématu Použití kontraktů zpráv.

Konstruktory

Vlastnosti

Metody

Explicitní implementace rozhraní

Platí pro