c# – 使用Owin自托管时从WebApi控制器抛出HttpResponseExceptio

但是,当我们开始使用Owin(自托管)时,我们遇到了这种方法的问题,导致HttpResponseException被序列化为json / xml,状态代码从404更改为500(内部服务器错误).这是我们的代码：

public class InvoicesController : ApiController
{
    private readonly IInvoiceRepository _invoiceRepository;

    public InvoicesController(IInvoiceRepository invoiceRepository)
    {
        _invoiceRepository = invoiceRepository;
    }

    [HttpGet]
    public IEnumerable<AccountCodeAssignment> AssignAccountCodesToInvoiceById(int id)
    {
        var invoice = _invoiceRepository.Get(id);

        if (invoice == null) throw new HttpResponseException(Request.CreateErrorResponse(HttpStatusCode.NotFound,"Invoice not found"));

        yield return new AccountCodeAssignment(1,...);
        yield return new AccountCodeAssignment(2,...);
        yield return new AccountCodeAssignment(3,...);
        yield return new AccountCodeAssignment(4,...);
    }
}

这是我们回复的响应以及500响应代码：

{
    "Message": "An error has occurred.","ExceptionMessage": "Processing of the HTTP request resulted in an exception. Please see the HTTP response returned by the 'Response' property of this exception for details.","ExceptionType": "System.Web.Http.HttpResponseException","StackTrace": "   at AccountCodeAssignmentService.Controllers.InvoicesController.<AssignAccountCodesToInvoiceById>d__0.MoveNext() in c:ProjectsAccountCodeAssignmentServiceSourceAccountCodeAssignmentServiceControllersInvoicesController.cs:line 38rn   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList(JsonWriter writer,IEnumerable values,JsonArrayContract contract,JsonProperty member,JsonContainerContract collectionContract,JsonProperty containerProperty)rn   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer,Object value,JsonContract valueContract,JsonContainerContract containerContract,JsonProperty containerProperty)rn   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter,Type objectType)rn   at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter,Type objectType)rn   at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type,Stream writeStream,Encoding effectiveEncoding)rn   at System.Net.Http.Formatting.JsonMediaTypeFormatter.WriteToStream(Type type,Encoding effectiveEncoding)rn   at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type,HttpContent content)rn   at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStreamAsync(Type type,HttpContent content,TransportContext transportContext,CancellationToken cancellationToken)rn--- End of stack trace from previous location where exception was thrown ---rn   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)rn   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)rn   at System.Web.Http.Owin.HttpMessageHandlerAdapter.<BufferResponseContentAsync>d__13.MoveNext()"
}

使用Owin自托管时,不支持任何关于我们做错了什么或HttpResponseException的想法？

编辑：
使用WebApi的一大优势是能够使用并返回我们自己的类型,因此我们希望避免更改返回类型.我们目前正在产生AccountCodeAssignment,因此不能选择更改返回类型.