創建用戶時讀取超時錯誤c＃

Question

我創建/編輯用戶時出現了這個非常奇怪的錯誤。 錯誤是這樣的：從 'Microsoft.Owin.Host.SystemWeb.CallStreams.InputStream' ReadTimeout「

錯誤獲取價值。

錯誤的提琴手是：

{ 
    "message": "An error has occurred.", 
    "exceptionMessage": "Error getting value from 'ReadTimeout' on 'Microsoft.Owin.Host.SystemWeb.CallStreams.InputStream'.", 
    "exceptionType": "Newtonsoft.Json.JsonSerializationException", 
    "stackTrace": " at Newtonsoft.Json.Serialization.DynamicValueProvider.GetValue(Object target)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.CalculatePropertyValues(JsonWriter writer, Object value, JsonContainerContract contract, JsonProperty member, JsonProperty property, JsonContract& memberContract, Object& memberValue)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeDictionary(JsonWriter writer, IDictionary values, JsonDictionaryContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeDictionary(JsonWriter writer, IDictionary values, JsonDictionaryContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType)\r\n at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType)\r\n at Newtonsoft.Json.JsonSerializer.Serialize(JsonWriter jsonWriter, Object value)\r\n at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding)\r\n at System.Net.Http.Formatting.JsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding)\r\n at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, HttpContent content)\r\n at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStreamAsync(Type type, Object value, Stream writeStream, HttpContent content, TransportContext transportContext, 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.Runtime.CompilerServices.TaskAwaiter.GetResult()\r\n at System.Web.Http.Owin.HttpMessageHandlerAdapter.<BufferResponseContentAsync>d__13.MoveNext()", 
    "innerException": { 
    "message": "An error has occurred.", 
    "exceptionMessage": "Timeouts are not supported on this stream.", 
    "exceptionType": "System.InvalidOperationException", 
    "stackTrace": " at System.IO.Stream.get_ReadTimeout()\r\n at Microsoft.Owin.Host.SystemWeb.CallStreams.DelegatingStream.get_ReadTimeout()\r\n at GetReadTimeout(Object)\r\n at Newtonsoft.Json.Serialization.DynamicValueProvider.GetValue(Object target)" 
    } 
} 

我試圖找出是什麼原因造成的，但我就是無法找到問題。 這裏是我的創建功能：

/// <summary> 
/// Creates a user 
/// </summary> 
/// <param name="model">The bound user model</param> 
/// <returns></returns> 
[HttpPost] 
[Route("")] 
public async Task<IHttpActionResult> CreateUser(UserBindingModel model) 
{ 

    // Save our user to the database 
    return Ok(await Save(model)); 
} 

/// <summary> 
/// Used to save a user 
/// </summary> 
/// <param name="model">The model representing the user</param> 
/// <returns></returns> 
private async Task<IHttpActionResult> Save(UserBindingModel model) 
{ 

    // If our ModelState is invalid, return a bad request 
    if (!ModelState.IsValid) 
     return BadRequest(ModelState); 

    // Get the current userId and date 
    var userId = User.Identity.GetUserId(); 
    var date = DateTime.UtcNow; 

    // Assign our binding model to a new model 
    var user = new User() 
    { 
     CompanyId = model.CompanyId, 
     UserName = model.Email, 
     Email = model.Email, 
     FirstName = model.FirstName, 
     LastName = model.LastName, 
     LastLoginDate = date, 
     Telephone = model.Telephone, 

     CreatedById = string.IsNullOrEmpty(model.CreatedById) ? userId : model.CreatedById, 
     DateCreated = string.IsNullOrEmpty(model.CreatedById) ? date : model.DateCreated, 
     ModifiedById = userId, 
     DateModified = date 
    }; 

    // Create our result 
    var result = new IdentityResult(); 

    // If we don't have a created by id 
    if (string.IsNullOrEmpty(model.CreatedById)) 
    { 

     // Try to create the user 
     result = await this.UserService.CreateAsync(user); 

     // Send our the confirmation email 
     await SendConfirmationEmail(user.Id); 
    } 
    else // Else 
    { 

     // Try to update the user 
     result = await this.UserService.UpdateAsync(user); 
    } 

    // If the creation fails, return the error 
    if (!result.Succeeded) 
     return GetErrorResult(result); 

    // Return the result 
    return Ok(this.ModelFactory.Create(user)); 
} 

/// <summary> 
/// Used to send a confirmation email to the user specified 
/// </summary> 
/// <param name="userId">The id of the user we wish to send an email to</param> 
/// <returns></returns> 
private async Task SendConfirmationEmail(string userId) 
{    
    // Generate our unique code 
    var code = await this.UserService.GenerateEmailConfirmationTokenAsync(userId); 

    // Create the callback url 
    var callbackUrl = new Uri(Url.Link("ConfirmEmailRoute", new { userId = userId, code = code }).Replace("api/users", "#/account")); 

    // Send the email 
    await this.UserService.SendEmailAsync(userId, "Confirm your account", "Please confirm your account by clicking <a href=\"" + callbackUrl + "\">here</a>"); 
} 

有沒有人有在此之前的錯誤或不知道是什麼原因造成的呢？ 我google了這個和所有的錯誤似乎綁在UserManager這是奇怪的，但沒有人有任何答案。

Answer 1

這通常發生在當您最終通過Web API返回之前「雙重包裝」或嵌套結果時，您看到的異常是JSON序列化碰撞內部結果的不受支持的屬性。

若要解決此問題，請查看所有正在返回IHttpActionResult的方法。我很困惑你爲什麼在你的代碼中包含CreateUser方法，因爲它看起來並沒有被你的Save方法使用，這個方法最初是我懷疑是你的問題。如果您在Save方法內有調用CreateUser並試圖返回它的結果，那麼您將會雙重包裝。