C# WCF服务不会返回500内部服务器错误。相反，只有400个错误请求

我创建了一个简单的RESTful WCF文件流服务。当发生错误时，我希望生成500个内部服务器错误响应代码。相反，只生成400个错误请求。 当请求有效时，我会得到正确的响应（200 OK），但即使我抛出异常，我也会得到400

IFileService：

[ServiceContract]
public interface IFileService
{
    [OperationContract]
    [WebInvoke(Method = "GET",
        BodyStyle = WebMessageBodyStyle.Bare,
        ResponseFormat = WebMessageFormat.Json,
        UriTemplate = "/DownloadConfig")]
    Stream Download();
}

[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Required)]
public class GCConfigFileService : IGCConfigFileService
{
    public Stream Download()
    {
        throw new Exception();
    }
}

文件服务：

[ServiceContract]
public interface IFileService
{
    [OperationContract]
    [WebInvoke(Method = "GET",
        BodyStyle = WebMessageBodyStyle.Bare,
        ResponseFormat = WebMessageFormat.Json,
        UriTemplate = "/DownloadConfig")]
    Stream Download();
}

[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Required)]
public class GCConfigFileService : IGCConfigFileService
{
    public Stream Download()
    {
        throw new Exception();
    }
}

Web.Config

<location path="FileService.svc">
<system.web>
  <authorization>
    <allow users="*"/>
  </authorization>
</system.web>
</location>
<system.serviceModel>
<client />
<behaviors>
  <serviceBehaviors>
    <behavior name="FileServiceBehavior">
      <serviceMetadata httpGetEnabled="true"/>
      <serviceDebug includeExceptionDetailInFaults="false" />
    </behavior>
  </serviceBehaviors>
  <endpointBehaviors>
    <behavior name="web">
      <webHttp/>
    </behavior>
  </endpointBehaviors>
</behaviors>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true"
  multipleSiteBindingsEnabled="true" />
<services>
  <service name="FileService" 
           behaviorConfiguration="FileServiceBehavior">
    <endpoint address=""
              binding="webHttpBinding"
              bindingConfiguration="FileServiceBinding"
              behaviorConfiguration="web"
              contract="IFileService"></endpoint>
  </service>
</services>
<bindings>
  <webHttpBinding>
    <binding
      name="FileServiceBinding"
      maxBufferSize="2147483647"
      maxReceivedMessageSize="2147483647"
      transferMode="Streamed"
      openTimeout="04:01:00"
      receiveTimeout="04:10:00" 
      sendTimeout="04:01:00">
      <readerQuotas maxDepth="2147483647" 
                    maxStringContentLength="2147483647"
                    maxArrayLength="2147483647" 
                    maxBytesPerRead="2147483647" 
                    maxNameTableCharCount="2147483647" />
    </binding>
  </webHttpBinding>
</bindings>

简单： 尝试抛出新的WebFaultException（HttpStatusCode.InternalServerError）

要指定错误详细信息，请执行以下操作：

throw new WebFaultException<string>("Custom Error Message!", HttpStatusCode.InternalServerError);

然后，您需要创建服务行为以附加到您的服务：

class ErrorBehaviorAttribute : Attribute, IServiceBehavior
{
   Type errorHandlerType;

   public ErrorBehaviorAttribute(Type errorHandlerType)
   {
      this.errorHandlerType = errorHandlerType;
   }

   public void Validate(ServiceDescription description, ServiceHostBase serviceHostBase)
   {
   }

   public void AddBindingParameters(ServiceDescription description, ServiceHostBase serviceHostBase, Collection<ServiceEndpoint> endpoints, BindingParameterCollection parameters)
   {
   }

   public void ApplyDispatchBehavior(ServiceDescription description, ServiceHostBase serviceHostBase)
   {
      IErrorHandler errorHandler;

      errorHandler = (IErrorHandler)Activator.CreateInstance(errorHandlerType);
      foreach (ChannelDispatcherBase channelDispatcherBase in serviceHostBase.ChannelDispatchers)
      {
         ChannelDispatcher channelDispatcher = channelDispatcherBase as ChannelDispatcher;
         channelDispatcher.ErrorHandlers.Add(errorHandler);
      }
   }
}

简单： 尝试抛出新的WebFaultException（HttpStatusCode.InternalServerError）

要指定错误详细信息，请执行以下操作：

throw new WebFaultException<string>("Custom Error Message!", HttpStatusCode.InternalServerError);

然后，您需要创建服务行为以附加到您的服务：

class ErrorBehaviorAttribute : Attribute, IServiceBehavior
{
   Type errorHandlerType;

   public ErrorBehaviorAttribute(Type errorHandlerType)
   {
      this.errorHandlerType = errorHandlerType;
   }

   public void Validate(ServiceDescription description, ServiceHostBase serviceHostBase)
   {
   }

   public void AddBindingParameters(ServiceDescription description, ServiceHostBase serviceHostBase, Collection<ServiceEndpoint> endpoints, BindingParameterCollection parameters)
   {
   }

   public void ApplyDispatchBehavior(ServiceDescription description, ServiceHostBase serviceHostBase)
   {
      IErrorHandler errorHandler;

      errorHandler = (IErrorHandler)Activator.CreateInstance(errorHandlerType);
      foreach (ChannelDispatcherBase channelDispatcherBase in serviceHostBase.ChannelDispatchers)
      {
         ChannelDispatcher channelDispatcher = channelDispatcherBase as ChannelDispatcher;
         channelDispatcher.ErrorHandlers.Add(errorHandler);
      }
   }
}

---

谢谢你的回复。我尝试了

抛出新的FaultException（！”

，但这对我不起作用（仍然得到400分）。FaultException似乎应该用于基于SOAP的服务，而我的不是。我使用的是基于REST的方法。更新答案后，请告诉我它是否适用于WebFaultException。WebFaultException确实会创建500个内部服务器错误，但是否无法设置错误消息？我想返回一个原因，但是WebFaultException类不允许我设置这个。非常感谢您的帮助<代码>WebFaultException（“自定义错误消息！”，HttpStatusCode.InternalServerError）正是我想要的。感谢您的回复。我尝试了

抛出新的FaultException（！”

，但这对我不起作用（仍然得到400分）。FaultException似乎应该用于基于SOAP的服务，而我的不是。我使用的是基于REST的方法。更新答案后，请告诉我它是否适用于WebFaultException。WebFaultException确实会创建500个内部服务器错误，但是否无法设置错误消息？我想返回一个原因，但是WebFaultException类不允许我设置这个。非常感谢您的帮助<代码>WebFaultException（“自定义错误消息！”，HttpStatusCode.InternalServerError）正是我要找的。