Question

编辑：这是我的调用堆栈。

System.ServiceModel.dll！System.ServiceModel.Channels.ServiceChannel.ThrowIfFaultUnderstood（System.ServiceModel.Channels.Message reply，System.ServiceModel.Channels.MessageFault fault，string action，System.ServiceModel.Channels.MessageVersion version，System .ServiceModel.Channels.FaultConverter faultConverter）+ 0x124 bytes
      System.ServiceModel.dll！System.ServiceModel.Channels.ServiceChannel.HandleReply（System.ServiceModel.Dispatcher.ProxyOperationRuntime operation，ref System.ServiceModel.Dispatcher.ProxyRpc rpc）+ 0x147 bytes
      System.ServiceModel.dll！System.ServiceModel.Channels.ServiceChannel.EndCall（string action，object [] outs，System.IAsyncResult result）+ 0xb2 bytes
      System.ServiceModel.dll！System.ServiceModel.ClientBase.ChannelBase.EndInvoke（string methodName，object [] args，System.IAsyncResult result）+ 0x1e bytes
    PhoneClient.dll！PhoneClient.ServiceReference1.Service1Client.Service1ClientChannel.EndGetFirstAidGuides（System.IAsyncResult result）Line 420 C＃       PhoneClient.dll！PhoneClient.ServiceReference1.Service1Client.PhoneClient.ServiceReference1.IService1.EndGetFirstAidGuides（System.IAsyncResult result）284行+ 0x7字节C＃       PhoneClient.dll！PhoneClient.ServiceReference1.Service1Client.OnEndGetFirstAidGuides（System.IAsyncResult result）第292行+ 0x2字节C＃       System.ServiceModel.dll！System.ServiceModel.ClientBase.OnAsyncCallCompleted（System.IAsyncResult result）+ 0x20 bytes
      System.ServiceModel.dll！System.ServiceModel.AsyncResult.Complete（bool completedSynchronously）+ 0x66 bytes
      System.ServiceModel.dll！System.ServiceModel.AsyncResult.Complete（bool completedSynchronously，System.Exception异常）+ 0xe字节
      System.ServiceModel.dll！System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.CallComplete（bool completedSynchronously，System.Exception异常）+ 0x8字节
      System.ServiceModel.dll！System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.FinishSend（System.IAsyncResult result，bool completedSynchronously）+ 0x99 bytes
      System.ServiceModel.dll！System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.SendCallback（System.IAsyncResult result）+ 0x1a bytes
      System.ServiceModel.dll！System.ServiceModel.AsyncResult.Complete（bool completedSynchronously）+ 0x66 bytes
      System.ServiceModel.dll！System.ServiceModel.AsyncResult.Complete（bool completedSynchronously，System.Exception异常）+ 0xe字节
      System.ServiceModel.dll！System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelAsyncRequest.OnGetResponse（System.IAsyncResult result）+ 0x52 bytes
      System.Windows.dll！System.Net.Browser.ClientHttpWebRequest.InvokeGetResponseCallback.AnonymousMethod__8（object state2）+ 0x1b bytes       mscorlib.dll！System.Threading.ThreadPool.WorkItem.WaitCallback_Context（对象状态）+ 0x18字节
      mscorlib.dll！System.Threading.ExecutionContext.Run（System.Threading.ExecutionContext executionContext，System.Threading.ContextCallback callback，object state）+ 0x63 bytes
      mscorlib.dll！System.Threading.ThreadPool.WorkItem.doWork（object o）+ 0x47 bytes       mscorlib.dll！System.Threading.Timer.ring（）+ 0x70 bytes

错误：由于内部错误，服务器无法处理请求。有关错误的更多信息，请在服务器上启用IncludeExceptionDetailInFaults（来自ServiceBehaviorAttribute或配置行为）以将异常信息发送回客户端，或者根据Microsoft .NET Framework 3.0 SDK文档启用跟踪并检查服务器跟踪日志。

我正在使用Windows Phone 7应用程序，我正在与WCF服务进行通信。我已经让它在一种方法中工作了。所以我认为这是可能的。

这是我调用WCF服务的类

public partial class FirstAidGuides : PhoneApplicationPage
{
    public FirstAidGuides()
    {
        InitializeComponent();
        ServiceReference1.Service1Client sc = new ServiceReference1.Service1Client();
        sc.GetFirstAidGuidesCompleted += new EventHandler<ServiceReference1.GetFirstAidGuidesCompletedEventArgs>(sc_GetFirstAidGuidesCompleted);
        sc.GetFirstAidGuidesAsync();
    }

    void sc_GetFirstAidGuidesCompleted(object sender, ServiceReference1.GetFirstAidGuidesCompletedEventArgs e)
    {
        FirstAidGuideText.Text = e.Result[0].Text;
    }
}

现在，我只想从我的结果中获取一些用文本块写的文字。

这是WCF服务的接口。

[ServiceContract]
public interface IService1
{

    [OperationContract]
    long CreateCall(string phoneNumber, double longtitude, double langtitude);

    [OperationContract]
    List<Model.FirstAidGuide> GetFirstAidGuides();
}

我的服务类的方法，它从数据库中提取数据。

public List<Model.FirstAidGuide> GetFirstAidGuides()
    {
        DataClasses1DataContext db = new DataClasses1DataContext();

        var firstAidGuides = (from f in db.FirstAidGuides select f);
        List<Model.FirstAidGuide> list = new List<Model.FirstAidGuide>();

        foreach (var guide in firstAidGuides.ToList())
        {
            Model.FirstAidGuide fa = new Model.FirstAidGuide();
            fa.FirstAidId = guide.FirstAidId;
            fa.Title = guide.FirstAidTitle;
            fa.Text = guide.FirstAidText;
            fa.LastUpdated = (DateTime)guide.LastUpdated;
            list.Add(fa);
        }
        return list;
    }

只是为了方便。 FirstAidGuide类。

[DataContract]
public class FirstAidGuide
{
    [DataMember]
    private string _title;
    [DataMember]
    private string _text;
    [DataMember]
    private DateTime _lastUpdated;
    [DataMember]
    private long _firstAidId;

    public long FirstAidId
    {
        get { return _firstAidId; }
        set { _firstAidId = value; }
    }      

    public DateTime LastUpdated
    {
        get { return _lastUpdated; }
        set { _lastUpdated = value; }
    }     

    public string Text
    {
        get { return _text; }
        set { _text = value; }
    }      

    public string Title
    {
        get { return _title; }
        set { _title = value; }
    }
}

我根本无法做任何事情。我收到一个FaultException，它指出我无法处理来自WCF服务的响应。

任何帮助都将不胜感激。

Answer 1

您是否可以尝试在WCF服务上启用tracing并检查跟踪以找出错误。还要设置以下属性以获取错误的完整堆栈跟踪

<serviceDebug includeExceptionDetailInFaults="true" />

Answer 2

我倾向于对WCF做的是将[OperationContract]方法中的所有内容包装在Try...Catch块中;解开任何捕获的异常和所有内部异常的堆栈跟踪，并将其作为字符串粘贴到FaultException的消息中，然后重新抛出soap边界。像这样：

public static string GetDebugString(this Exception ex)
{
   var builder = new StringBuilder();
   GetDebugString(ex, builder);
   while ((ex = ex.InnerException) != null)
   {
      GetDebugString(ex, builder);
   }
   return builder.ToString();
}


private static void GetDebugString(Exception ex, StringBuilder builder)
{
    builder.AppendLine(ex.GetType().Name);
    builder.AppendLine();
    builder.AppendLine(ex.Message);
    builder.AppendLine();
    builder.AppendLine(ex.StackTrace);
    builder.AppendLine();
}

[OperationContract]
public void Foo()
{
    this.MakeSafeCall(() => this.UnsafeFoo());
}

public void Unsafe()
{
    // do stuff
}

private void MakeSafeCall(Action action)
{
    try
    {
       action();
    }
    catch (Exception ex)
    {
       throw new FaultException(ex.GetDebugString());
    }
}

Answer 3

问题在于这一行：

foreach（firstAidGuides.ToList（）中的var指南）

显然调用.ToList（）使整个事情崩溃。只需删除.ToList（）即可修复所有内容。

尝试使用WCF服务时获取FaultException

3 个答案: