Question

考虑以下合同

[OperationContract]
[FaultContract(typeof(CcmFaultException))]
void UploadStream(DataFileStream input);`

[MessageContract]
public class DataFileStream
{
    [MessageHeader(MustUnderstand = true)]
    public String FileName { get; set; }

    [MessageHeader(MustUnderstand = true)]
    public long FileSize { get; set; }

    [MessageBodyMember(Order = 1)]
    public Stream StreamData { get; set; }
}

我确实有两个主要问题。

第一个问题是在服务方面我无法更改UploadStream签名，当我在接口和相关类中更改方法签名时（例如添加返回类型或更多输入参数），我可以构建服务但是当我运行主机应用程序时，我收到以下错误：

[System.InvalidOperationException]
操作UploadStream要么具有参数，要么具有与MessageContractAttribute一起归属的返回类型为了使用消息合同表示请求消息，操作必须具有一个归属于...的单个参数

另一个问题是在客户端，即使我使用UploadStream(DataFileStream data)合同我可以创建一个DataFileStream类的对象，但是当我想调用UploadStream方法时，我无法传递该对象！我看到的唯一选择是客户端的以下签名：

UploadStream(string FileName, long FileSize, Stream StreamData);

请你帮我解决这两个问题。

谢谢

P.S：我使用以下配置：

<system.serviceModel>
  <bindings>
    <wsHttpBinding>
      <binding name="CCMService.Binding_ICcmWcfService" closeTimeout="00:10:00"
        openTimeout="00:10:00" receiveTimeout="00:10:00" sendTimeout="00:10:00"
        maxReceivedMessageSize="2147483647">
        <reliableSession ordered ="false" inactivityTimeout ="00:05:00"
        enabled ="true" />
        <security mode="TransportWithMessageCredential">
          <transport clientCredentialType="None" proxyCredentialType="None"
           realm="" />
          <message clientCredentialType="UserName" 
                   negotiateServiceCredential="true" />
        </security>
      </binding>
    </wsHttpBinding>
  </bindings>

  <client>
    <endpoint address="https://localhost:8731/CCMService" 
              binding="wsHttpBinding"
      bindingConfiguration="CCMService.Binding_ICcmWcfService" 
      contract="CCMServiceRef.ICcmWcfService"
      name="CCMService.Binding_ICcmWcfService">
      <identity>
        <dns value="localhost" />
      </identity>
    </endpoint>
  </client>
</system.serviceModel>

Answer 1

@ Steve16351

考虑客户端应用程序中的以下实现

    private void btnImport_Click(object sender, EventArgs e)
    {
       CCMServiceRef.DataFileStream obj = new CCMServiceRef.DataFileStream()
       {
          FileName = _FileName,
          StreamData = GetStream(_FilePath)
       };
       Program.serviceManager.Client.ImportScript(obj);
    }


    private Stream GetStream(string filePath)
    {
        System.IO.MemoryStream data = new System.IO.MemoryStream();
        System.IO.Stream str = File.OpenRead(filePath);
        str.CopyTo(data);
        data.Seek(0, SeekOrigin.Begin);
        byte[] buf = new byte[data.Length];
        data.Read(buf, 0, buf.Length);
        return data;
    }

当我切换到DataContract程序编译和主机应用程序运行时，但是当我调用Service方法（Program.serviceManager.Client.ImportScript（obj））时，程序会持续几分钟，直到不活动超时提升为止！实际上，Service方法从未执行过！

文件通过WCF传输

1 个答案: