无法将类型为"Newtonsoft.Json.Linq.JObject"的对象转换为类型为"System.Runtime.Serialization.ISafeSeria

本文介绍了无法将类型为"Newtonsoft.Json.Linq.JObject"的对象转换为类型为"System.Runtime.Serialization.ISafeSerializationData"的对象的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我在尝试反序列化Web api调用时遇到以下异常-消息晦涩难懂，所以我无法理解发生了什么-此强制转换在其他情况下仍然有效，不确定这里出了什么问题:

I am getting the following exception trying to deserialize a web api call - the message is obscure so I can't understand what is going on - this cast works in other cases not sure what's wrong here:

例外:

InnerException: System.Reflection.TargetInvocationException _HResult=-2146232828 _message=Exception has been thrown by the target of an invocation. HResult=-2146232828 IsTransient=false Message=Exception has been thrown by the target of an invocation. Source=mscorlib StackTrace: at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters) at Newtonsoft.Json.Serialization.JsonContract.<>c__DisplayClass1.<CreateSerializationCallback>b__0(Object o, StreamingContext context) at Newtonsoft.Json.Serialization.JsonContract.InvokeOnDeserialized(Object o, StreamingContext context) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.OnDeserialized(JsonReader reader, JsonContract contract, Object value) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateISerializable(JsonReader reader, JsonISerializableContract contract, JsonProperty member, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue(JsonProperty property, JsonConverter propertyConverter, JsonContainerContract containerContract, JsonProperty containerProperty, JsonReader reader, Object target) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent) at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonSerializer.Deserialize(JsonReader reader, Type objectType) at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.ReadFromStream(Type type, Stream readStream, Encoding effectiveEncoding, IFormatterLogger formatterLogger) at System.Net.Http.Formatting.JsonMediaTypeFormatter.ReadFromStream(Type type, Stream readStream, Encoding effectiveEncoding, IFormatterLogger formatterLogger) at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.ReadFromStream(Type type, Stream readStream, HttpContent content, IFormatterLogger formatterLogger) at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.ReadFromStreamAsync(Type type, Stream readStream, HttpContent content, IFormatterLogger formatterLogger) --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at System.Net.Http.HttpContentExtensions.<ReadAsAsyncCore>d__0`1.MoveNext() InnerException: System.InvalidCastException _HResult=-2147467262 _message=Unable to cast object of type 'Newtonsoft.Json.Linq.JObject' to type 'System.Runtime.Serialization.ISafeSerializationData'. HResult=-2147467262 IsTransient=false Message=Unable to cast object of type 'Newtonsoft.Json.Linq.JObject' to type 'System.Runtime.Serialization.ISafeSerializationData'. Source=mscorlib StackTrace: at System.Runtime.Serialization.SafeSerializationManager.CompleteDeserialization(Object deserializedObject) at System.Exception.OnDeserialized(StreamingContext context) InnerException:

我的代码:

public SensoriaApiResult<T> PostSensoriaApiResult(object body) { HttpClient client = SetupClient(); HttpResponseMessage response; response = client.PostAsJsonAsync(url, body).Result; SensoriaApiResult<T> result = response.Content.ReadAsAsync<SensoriaApiResult<T>>().Result; return result; }

Json返回:

{"StatusCode":500,"APIResult":null,"HttpError":{"Message":"Sensoria API internal error","SensoriaApiErrorCode":983041},"Exception":{"ClassName":"System.Data.Entity.Infrastructure.DbUpdateException","Message":"An error occurred while updating the entries. See the inner exception for details.","Data":{},"InnerException":{"ClassName":"System.Data.Entity.Core.UpdateException","Message":"An error occurred while updating the entries. See the inner exception for details.","Data":{},"InnerException":{"Errors":[{"source":".Net SqlClient Data Provider","number":547,"state":0,"errorClass":16,"server":".","message":"The INSERT statement conflicted with the FOREIGN KEY constraint \"FK_UserBase.ClosetItems_Catalog.Products\". The conflict occurred in database \"Sensoria.Knowledge.Database\", table \"dbo.Catalog.Products\", column 'ProductId'.","procedure":"","lineNumber":1,"win32ErrorCode":0},{"source":".Net SqlClient Data Provider","number":3621,"state":0,"errorClass":0,"server":".","message":"The statement has been terminated.","procedure":"","lineNumber":1,"win32ErrorCode":0}],"ClientConnectionId":"7b976c29-59ff-491c-a3aa-01750e17cb36","ClassName":"System.Data.SqlClient.SqlException","Message":"The INSERT statement conflicted with the FOREIGN KEY constraint \"FK_UserBase.ClosetItems_Catalog.Products\". The conflict occurred in database \"Sensoria.Knowledge.Database\", table \"dbo.Catalog.Products\", column 'ProductId'.\r\nThe statement has been terminated.","Data":{"HelpLink.ProdName":"Microsoft SQL Server","HelpLink.ProdVer":"11.00.3128","HelpLink.EvtSrc":"MSSQLServer","HelpLink.EvtID":"547","HelpLink.BaseHelpUrl":"go.microsoft/fwlink","HelpLink.LinkId":"20476"},"InnerException":null,"HelpURL":null,"StackTraceString":" at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)\r\n at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)\r\n at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)\r\n at System.Data.SqlClient.SqlDataReader.TryConsumeMetaData()\r\n at System.Data.SqlClient.SqlDataReader.get_MetaData()\r\n at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)\r\n at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds)\r\n at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite)\r\n at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)\r\n at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)\r\n at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)\r\n at System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.<>c__DisplayClassb.<Reader>b__8()\r\n at System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch[TInterceptionContext,TResult](Func`1 operation, TInterceptionContext interceptionContext, Action`1 executing, Action`1 executed)\r\n at System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader(DbCommand command, DbCommandInterceptionContext interceptionContext)\r\n at System.Data.Entity.Internal.InterceptableDbCommand.ExecuteDbDataReader(CommandBehavior behavior)\r\n at System.Data.Entity.Core.Mapping.Update.Internal.DynamicUpdateCommand.Execute(Dictionary`2 identifierValues, List`1 generatedValues)\r\n at System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update()","RemoteStackTraceString":null,"RemoteStackIndex":0,"ExceptionMethod":"8\nOnError\nSystem.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\nSystem.Data.SqlClient.SqlConnection\nVoid OnError(System.Data.SqlClient.SqlException, Boolean, System.Action`1[System.Action])","HResult":-2146232060,"Source":".Net SqlClient Data Provider","WatsonBuckets":null},"HelpURL":null,"StackTraceString":" at System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update()\r\n at System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.<Update>b__2(UpdateTranslator ut)\r\n at System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update[T](T noChangesResult, Func`2 updateFunction, Boolean throwOnClosedConnection)\r\n at System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update(Boolean throwOnClosedConnection)\r\n at System.Data.Entity.Core.Objects.ObjectContext.<SaveChangesToStore>b__33()\r\n at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)\r\n at System.Data.Entity.Core.Objects.ObjectContext.SaveChangesToStore(SaveOptions options, IDbExecutionStrategy executionStrategy)\r\n at System.Data.Entity.Core.Objects.ObjectContext.<>c__DisplayClass28.<SaveChanges>b__25()\r\n at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)\r\n at System.Data.Entity.Core.Objects.ObjectContext.SaveChanges(SaveOptions options)\r\n at System.Data.Entity.Internal.InternalContext.SaveChanges()","RemoteStackTraceString":null,"RemoteStackIndex":0,"ExceptionMethod":"8\nUpdate\nEntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\nSystem.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator\nInt32 Update()","HResult":-2146233087,"Source":"EntityFramework","WatsonBuckets":null},"HelpURL":null,"StackTraceString":" at Sensoria.Models.ShoeClosetModel.CreateClosetModelForUser(Int32 userId, ShoeClosetItem newClosetItem) in c:\\Users\\maurgi\\Source\\Hg\\sensoria-main\\Source\\Web\\Sensoria.Models\\ShoeClosetModel.cs:line 225\r\n at Sensoria.Models.ShoeClosetModel.CreateClosetItem(Int32 userID, ShoeClosetItem newClosetItem) in c:\\Users\\maurgi\\Source\\Hg\\sensoria-main\\Source\\Web\\Sensoria.Models\\ShoeClosetModel.cs:line 76\r\n at Sensoria.Api.Controllers.ShoeClosetController.AddNewShoe(Int32 userId, ShoeClosetItem sItem) in c:\\Users\\maurgi\\Source\\Hg\\sensoria-main\\Source\\Web\\Sensoria.Api\\Controllers\\ShoeClosetController.cs:line 79","RemoteStackTraceString":null,"RemoteStackIndex":0,"ExceptionMethod":"8\nCreateClosetModelForUser\nSensoria.Models, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null\nSensoria.Models.ShoeClosetModel\nSensoria.Models.ShoeClosetModel CreateClosetModelForUser(Int32, Sensoria.Api.Core.Models.ShoeClosetItem)","HResult":-2146233087,"Source":"Sensoria.Models","WatsonBuckets":null,"SafeSerializationManager":{"m_serializedStates":[{"<InvolvesIndependentAssociations>k__BackingField":false}]},"CLR_SafeSerializationManager_RealType":"System.Data.Entity.Infrastructure.DbUpdateException, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"},"ModelState":null}

通用APIResult类定义:

The Generic APIResult class definition:

public class SensoriaApiResult<T> { /// <summary> /// The /// </summary> [DataMember] public HttpStatusCode StatusCode; [DataMember] public T APIResult; [DataMember] public HttpError HttpError; [DataMember] public Exception Exception; [DataMember] public ModelStateDictionary ModelState; ...

}

推荐答案

由于这个问题将近2年了，我非常怀疑我对原始海报有什么帮助，但是对于任何使用此错误的人来说，这是造成的由于许多实体数据框架异常未实现序列化构造函数，而是依赖于 SerializeObjectState 事件(就像System.Net.Http.HttpRequestException一样，该事件恰好是使 me 适合的小虫子)在过去的几个小时内). JSON.NET无法正确处理这种情况，如此错误报告中所述.

Since this question is almost 2 years old, I highly doubt I can be of any help to the original poster, but for anyone googling this error, this is caused by the fact that many entity data framework exceptions do not implement a serialization constructor, and instead rely on the SerializeObjectState event (as does System.Net.Http.HttpRequestException, which happens to be the little bugger that has been giving me fits for the past few hours). JSON.NET does not properly handle this situation, as documented in this bug report.