c# - 对 WebService 服务器的 C# 调用无法处理请求。---> 对象引用未设置为对象的实例

Question

我正在尝试通过 C# 调用 WebService 并且遇到了障碍。我无法弄清楚为什么我无法进行此调用，我正在使用相同的方法调用其他服务，但是这个传递了一个数组，我认为这就是问题所在......我尝试了许多不同的方法来初始化我的数组，我认为它工作正常，但抛出的错误并没有告诉我哪个对象导致了问题......

public void addActionCall(SurveyUser tUser)
{
    //Create Client Object
    RCServicesSoapClient sClient = new RCServicesSoapClient();

    //Create Action Array
    ActionItem[] tAction = new ActionItem[2];

    //Initialize first item in the array 
    tAction[0] = new ActionItem();

    //Assign values to first item
    tAction[0].ActionType = "permission to contact via email";
    tAction[0].ActionDefinedValue = "no";

    //Initialize second item
    tAction[1] = new ActionItem();

    //Assign values to second item
    tAction[1].ActionType = "age (if given):";
    tAction[1].ActionOpenValue = "33";

    //create AddAction Response
    AddActionResponseBody addActionResponse = new AddActionResponseBody();

    //Call AddAction WebService
    addActionResponse.AddActionResult = sClient.AddAction(tUser.Guid, "testinfo", "testinfo", tAction); //This is where it breaks

    Console.WriteLine("Status Code: " + addActionResponse.AddActionResult.statusCode);
    Console.WriteLine("Status Description: " + addActionResponse.AddActionResult.statusDesc);
    Console.WriteLine("AddAction Test Complete - Press Enter to Continue");
    Console.ReadLine();
}

有任何想法吗？

例外：

System.ServiceModel.FaultException was unhandled
  HResult=-2146233087
  Message=Server was unable to process request. ---> Object reference not set to an instance of an object.
  Source=mscorlib
  StackTrace:
    Server stack trace: 
       at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
       at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
       at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
       at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)
    Exception rethrown at [0]: 
       at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
       at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
       at WebServicesTesting.RCWS.RCServicesSoap.AddAction(AddActionRequest request)
       at WebServicesTesting.RCWS.RCServicesSoapClient.WebServicesTesting.RCWS.RCServicesSoap.AddAction(AddActionRequest request) in C:\Users\chris.lovell\Documents\Visual Studio 2010\Projects\WebServicesTesting\WebServicesTesting\Service References\RCWS\Reference.cs:line 4686
       at WebServicesTesting.RCWS.RCServicesSoapClient.AddAction(String GUID, String ClientCode, String Domain, ActionItem[] Action) in C:\Users\chris.lovell\Documents\Visual Studio 2010\Projects\WebServicesTesting\WebServicesTesting\Service References\RCWS\Reference.cs:line 4696
       at WebServicesTesting.TestHarness.addActionCall(SurveyUser tUser) in C:\Users\chris.lovell\Documents\Visual Studio 2010\Projects\WebServicesTesting\WebServicesTesting\Program.cs:line 291
       at WebServicesTesting.WebServicesTest.Main(String[] args) in C:\Users\chris.lovell\Documents\Visual Studio 2010\Projects\WebServicesTesting\WebServicesTesting\Program.cs:line 73
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()

添加操作方法：

public WebServicesTesting.RCWS.ActionItem AddAction(string GUID, string ClientCode, string Domain, WebServicesTesting.RCWS.ActionItem[] Action)
{
    WebServicesTesting.RCWS.AddActionRequest inValue = new WebServicesTesting.RCWS.AddActionRequest();
    inValue.Body = new WebServicesTesting.RCWS.AddActionRequestBody();
    inValue.Body.GUID = GUID;
    inValue.Body.ClientCode = ClientCode;
    inValue.Body.Domain = Domain;
    inValue.Body.Action = Action;
    WebServicesTesting.RCWS.AddActionResponse retVal = ((WebServicesTesting.RCWS.RCServicesSoap)(this)).AddAction(inValue);
    return retVal.Body.AddActionResult;
}