c# - System.Web.Services.Protocols.SoapException : Server was unable to process request. ---> System.ArgumentNullException

Question

我遇到了错误:

System.Web.Services.Protocols.SoapException:服务器无法处理请求。 ---> System.ArgumentNullException

当我尝试使用以下代码调用我的网络服务时:

{
//Create an echoSync request - set the services.
ServiceNameType sourceService = new ServiceNameType {Service = "echoSync", OnBehalfOf = "Source"};
ServiceNameType destService = new ServiceNameType {Service = "echoSync", OnBehalfOf = "Destination"};

//Create the request.
SDD2RequestType request = new SDD2RequestType
                  {
                      AppId = "echoSync",
                      SourceService = sourceService,
                      DestService = destService,
                      RequestId = "1",
                      RequestBody = "Ping"
                  };

//Create the originator.
originator originator = new originator {id = "123456789"};

//Create the transport.
SDD2Transport transport = new SDD2Transport {originatorValue = originator};

//Send the request.
SDD2ResponseType response = null;
response = transport.SDD2TransportOp(request);

//Write out the response.
System.Console.WriteLine(response.ResponseBody.ToString());
}

我的网络服务方法很简单，看起来像这样:

    [System.Web.Services.Protocols.SoapHeaderAttribute("originatorValue", Direction = System.Web.Services.Protocols.SoapHeaderDirection.InOut)]
    [System.Web.Services.WebMethodAttribute()]
    [System.Web.Services.Protocols.SoapDocumentMethodAttribute("http://memberdirect.net/SDD2/Transport", RequestElementName = "SDD2Transport", RequestNamespace = "http://cucbc.com/sdd2/transport/", ResponseElementName = "SDD2TransportResponse", ResponseNamespace = "http://cucbc.com/sdd2/transport/", Use = System.Web.Services.Description.SoapBindingUse.Literal, ParameterStyle = System.Web.Services.Protocols.SoapParameterStyle.Default)]
    [return: System.Xml.Serialization.XmlElementAttribute("SDD2Response", Namespace = "http://cucbc.com/sdd2/")]
    public override SDD2ResponseType SDD2TransportOp(SDD2RequestType SDD2Request)
    {
        if (SDD2Request == null) throw new ArgumentNullException("SDD2Request");
        var response = new SDD2ResponseType();

        switch (SDD2Request.AppId)
        {
            case "echoSync":
                response.AppId = SDD2Request.AppId;
                response.ProcessingStatus = ProcessingStatusType.Complete;
                response.RequestId = SDD2Request.RequestId;
                response.ResponseBody = "Pong";
                break;
            default:
                throw new System.NotImplementedException();
                break;
        }

        return response;
    }

当我进行调用时，我知道请求不是 NULL，但是当它到达 web 服务时，它总是被接收为 null。我使用 wsdl.exe 实用程序从 WSDL 生成了 web 服务，显然我不了解我应该了解的 SOAP 的所有细节。还有其他人遇到过这个问题吗？

Answer 1

我不知道是什么原因造成的，所以这不是您问题的答案，而只是对进一步研究问题的方法的建议

尝试使用嗅探器查看机器之间发送的实际数据，找出问题出在哪一边。我用过 Wireshark成功一次。