WCF MessageContract 格式问题 [英] WCF MessageContract formatting issue

问题描述

我对 MessageContact 的 WCF 定义和客户端调用函数有问题.

I have a problem of WCF definition of MessageContact and client calling function.

场景；客户端使用字符串类型引用 ID 调用服务，服务器响应 AudioObject 类型的实例.AudioObject 由 Stream 作为 MessageBodyMember 和 FormatObject 作为 MessageHeader 组成.

Scenario; Client called the service with a string type reference ID and server responds instance of type of AudioObject. AudioObject consists of Stream as MessageBodyMember and FormatObject as a MessageHeader.

以下是 WCF 代码片段.

Following is WCF code snippet.

[ServiceContract]
public interface IAudioStreamService
{
    [OperationContract]
    AudioObject GetAudioDataStream(StringMessage RefID);
}

//StringMessageContract
[MessageContract]
public class StringMessage
{
    [MessageBodyMember]
    public string Name;
}

[MessageContract]
public class AudioObject
{
    Stream _audioStream;
    AudioFormat _audioFormat;

    [MessageBodyMember (Order=1)]
    public Stream AudioStream
    {
        get { return _audioStream; }
        set { _audioStream = value; }
    }

    [MessageHeader(MustUnderstand=true)]
    public AudioFormat AudioFormat
    {
        get { return _audioFormat; }
        set { _audioFormat = value; }
    }
}

[DataContract]
public class AudioFormat
{
    int _nChannels;
    int _nKilloBitsPerSec;
    int _nSamplesPerSec;

    [DataMember(Name="nChannels", Order=0, IsRequired=true)]
    public int nChannels
    {
        get { return _nChannels; }
        set { _nChannels = value; }
    }
    [DataMember(Name = "nKilloBitsPerSec", Order = 1, IsRequired = true)]
    public int nKilloBitsPerSec
    {
        get { return _nKilloBitsPerSec; }
        set { _nKilloBitsPerSec = value; }
    }
    [DataMember(Name = "nSamplesPerSec", Order = 2, IsRequired = true)]
    public int nSamplesPerSec
    {
        get { return _nSamplesPerSec; }
        set { _nSamplesPerSec = value; }
    }
}

客户端代码如下，

BasicHttpBinding binding = new BasicHttpBinding();
binding.MaxReceivedMessageSize = 176160768;                       
EndpointAddress endpointAddress = new EndpointAddress("URLToService");
AudioStreamServiceClient client = new AudioStreamServiceClient(binding, 
endpointAddress);
    AudioFormat audioFormat = client.GetAudioDataStream("000", out serverStream); 

上面的代码运行良好.但问题是，

The above code is worked fine. But the issue is,

为了OperationContract的格式，我期望客户端代码如下，

In order to the format of the OperationContract, I expected the client code as follows,

AudioObject audioObject = client.GetAudioDataStream("0000");

但是我的 ServiceReference 以另一种方式生成了客户端存根(如代码所示).谁能解释一下这件事的原因.

But my ServiceReference generated the client-stub other way round(as shown in code). Can anybody explain me the reason for this matter.

推荐答案

或者通过从 ClientBase 或使用您选择的方法签名编写扩展方法.

Either write a client yourself by deriving a class from ClientBase or write an extension method with the method signature of your choice.

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