使用lambda的奇怪的Json轉換錯誤

Question

我有一個Json文檔被髮送到一個Web API，該Web API被轉換爲地址數組。如果我發送一個地址，下面的代碼就可以工作，但是如果我發送兩個地址，它就會死亡。有任何想法嗎？

輸入到失敗看起來像這樣的Web服務：

[ 
    "\"TrackingIdTest_2\"", 
    "[ 
    {\"CustomerAddressKey\":\"1\",\"Address\":\"6069 W STUDIO CT\",\"City\":\"LOS ANGELES\",\"State\":\"CA\",\"Zipcode\":\"\"} 
    ,{\"CustomerAddressKey\":\"2\",\"Address\":\"1095 6th Ave\",\"City\":\"NEW YORK\",\"State\":\"NY\",\"Zipcode\":\"\"} 
    ]" 
] 

如果我把這個工作原理：

[ 
    "\"TrackingIdTest_2\"", 
    "[ 
    {\"CustomerAddressKey\":\"1\",\"Address\":\"6069 W STUDIO CT\",\"City\":\"LOS ANGELES\",\"State\":\"CA\",\"Zipcode\":\"\"} 
    ]" 
] 

這是代碼拋出的錯誤是：

var addressesInternal = new List<RequestAddressInternal>(); 
addresses.ToList().ForEach(x => 
{ 
    addressesInternal.Add(new RequestAddressInternal() 
    { 
    InternalAddressKey = Guid.NewGuid().ToString(), 
    RequestAddress = x 
    }); 
}); 

地址的定義如下：

RequestAddress[] addresses 
// Defined in a Model class: 
public class RequestAddress 
{ 
    public string CustomerAddressKey { get; set; } 
    public string Address { get; set; } 
    public string City { get; set; } 
    public string State { get; set; } 
    public string Zipcode { get; set; } 
} 

RequestAddressInternal看起來是這樣的：

public class RequestAddressInternal 
{ 
    public string InternalAddressKey { get; set; } 
    public RequestAddress RequestAddress { get; set; } 
} 

我回來從Web服務的錯誤是這樣的：

{ 
"Message": "An error has occurred.", 
"ExceptionMessage": "This document already has a 'DocumentElement' node.", 
"ExceptionType": "System.InvalidOperationException", 
"StackTrace": " at System.Xml.XmlDocument.IsValidChildType(XmlNodeType type)\r\n at System.Xml.XmlNode.AppendChild(XmlNode newChild)\r\n at Newtonsoft.Json.Converters.XmlNodeWrapper.AppendChild(IXmlNode newChild)\r\n at Newtonsoft.Json.Converters.XmlNodeConverter.CreateElement(JsonReader reader, IXmlDocument document, IXmlNode currentNode, String elementName, XmlNamespaceManager manager, String elementPrefix, Dictionary`2 attributeNameValues)\r\n at Newtonsoft.Json.Converters.XmlNodeConverter.ReadElement(JsonReader reader, IXmlDocument document, IXmlNode currentNode, String propertyName, XmlNamespaceManager manager)\r\n at Newtonsoft.Json.Converters.XmlNodeConverter.DeserializeValue(JsonReader reader, IXmlDocument document, XmlNamespaceManager manager, String propertyName, IXmlNode currentNode)\r\n at Newtonsoft.Json.Converters.XmlNodeConverter.DeserializeNode(JsonReader reader, IXmlDocument document, XmlNamespaceManager manager, IXmlNode currentNode)\r\n at Newtonsoft.Json.Converters.XmlNodeConverter.ReadJson(JsonReader reader, Type objectType, Object existingValue, JsonSerializer serializer)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.DeserializeConvertable(JsonConverter converter, JsonReader reader, Type objectType, Object existingValue)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent)\r\n at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType)\r\n at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings)\r\n at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonConverter[] converters)\r\n at Newtonsoft.Json.JsonConvert.DeserializeXmlNode(String value, String deserializeRootElementName, Boolean writeArrayAttribute)\r\n at Midas.WebApi.waCarrierServiceabilityLib.CarrierServiceabilityImpl.ProcessBulkImpl(String serviceRequest, String clientId, String clientRequestTrackingId, RequestAddress[] addresses, String clientOwner, String uid, String ipAddress, Boolean includeGeodata) in E:\\Source Code\\GitHub\\waCarrierServiceability\\waCarrierServiceabilityLib\\CarrierServiceabilityImpl.cs:line 222\r\n at Midas.WebApi.waCarrierServiceabilityLib.CarrierServiceabilityImpl.ProcessBulk(String serviceRequest, JArray requestRaw, String clientId, String clientOwner, String userId, String ipAddress, Boolean includeGeodata) in E:\\Source Code\\GitHub\\waCarrierServiceability\\waCarrierServiceabilityLib\\CarrierServiceabilityImpl.cs:line 134\r\n at Midas.WebApi.waCarrierServiceability.Controllers.CarrierServiceabilityController.GetCarrierServiceabilityBulk(JArray jsonParamList) in E:\\Source Code\\GitHub\\waCarrierServiceability\\Controllers\\CarrierServiceability.cs:line 120\r\n at lambda_method(Closure , Object , Object[])\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Tracing.ITraceWriterExtensions.<TraceBeginEndAsyncCore>d__18`1.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Tracing.ITraceWriterExtensions.<TraceBeginEndAsyncCore>d__18`1.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Tracing.Tracers.HttpControllerTracer.<ExecuteAsyncCore>d__5.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Tracing.ITraceWriterExtensions.<TraceBeginEndAsyncCore>d__18`1.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()" 
} 

在這一點上我想知道，如果它的線程的一段時間類型問題是什麼？我包裝了最後一個在try catch中執行的代碼並捕獲異常，但是沒有拋出任何異常，它只是永遠不會讓它到達代碼中的下一行。

Answer 1

我不能夠給不幸一個完整的答案，但有一看，一對夫婦的事情，可能是值得一試：

1. 它看起來可能的JSON解析，讓您的輸入字符串到數組addresses可能會失敗（因此，當您到達代碼中的這個階段時，它不是您期望的兩個解析的Json字符串）。你可以嘗試在調試器的這一行上設置一個斷點，然後檢查addresses等於什麼？

2. 有時使用LINQ可能會很棘手，直到lambda調用（x => ...）被返回後纔會發生什麼情況。爲了得到這個你周圍可以設置一個臨時變量：

   var temp = addresses.ToList(); 
   

   ，然後你可以使用這個值來檢查什麼的第一個元素在列表temp發生，如果應用在你的代碼下面的步驟。使用調試器進行調試可能有助於查看錯誤進入的位置？

再次道歉，這只是一個可能的想法列表，但希望你能解決你的問題！