InvalidCastException的映射JSON字符串到GUID屬性

有theese波蘇斯：InvalidCastException的映射JSON字符串到GUID屬性

public class UserRegistration 
{ 
    [Required] 
    public ApiKey ApiKey { get; set; } 
    ... 
} 

public class ApiKey 
{ 
    [Required] 
    public Guid AppKey { get; set; } 
    ... 
}

與此JSON：

{ 
    "apiKey": { 
     "appKey": "D8B4DE20-5654-43B0-B3F6-FDA416087FDE" 
    } 
}

我得到一個異常：

System.InvalidCastException: Unable to cast object of type 'System.Guid' to type 'System.String'. 
at System.Web.Http.ApiController.d__b.MoveNext() 
--- 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.Web.Http.Dispatcher.HttpControllerDispatcher.d__0.MoveNext()

調用這個一個ASP .NET Web API控制器：

public HttpResponseMessage Put([FromBody]UserRegistration userRegistration) 
{ 
}

如果改變屬性類型形式Guid字符串，一切正常，但我想Guid。是否支持這種情況？

來源

2013-07-23 abatishchev

這應該是有幫助的http://stackoverflow.com/questions/13640463/json- net-exception-when-deserializing -a-guid-array-of-guids – Ehsan

@EhsanUllah：這是否意味着Guid不受支持，我需要接受字符串然後手動解析它？ – abatishchev

非常如此。 – Ehsan

什麼是不很明顯從異常堆棧跟蹤之後，問題不是在映射，但在驗證屬性裝飾：

[Required] 
[StringLength(36)] // NO-NO! 
public Guid AppKey { get; set; }

來源

2013-07-23 20:47:38 abatishchev

InvalidCastException的映射JSON字符串到GUID屬性

回答

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