MVC4-JQuery/Ajax post返回[ArgumentException:无效的JSON原语：类别。]

我正在尝试使用ajax将表单发布到MVC4中的特定操作。它进入控制器/动作，但抛出NullReferenceException，即使该动作确实接收到数据

行动如下：

    [HttpPost]
    public ActionResult EditPlayer(PlayerDisplay myPlayer)
    {    

            updatePlayer(myPlayer); //updatePlayer() does all the work of updating the player information.
            bool json = true;
            return Json(json);
    }

这是表格

@模型WebPlayerMonitor.Models.PlayerDisplay

<fieldset>
    <legend id="edit-player-account"><b>Account: </b>@Model.account</legend>
    <form id="editForm">
...
    <button id="btn-edit" class="button round medium">Save & Close</button>
    <a class="close-reveal-modal">&#215;</a>
</form>
</fieldset>

模型：

    public class PlayerDisplay
    {
        [StringLength(maximumLength: 30)]
        [Required]
        [Display(Name = "Account")]
        public string account { get; set; }

        [DataType(DataType.Text)]
        [StringLength(maximumLength: 255)]
        [Display(Name = "Link Iovation")]
        public string link_Iovation { get; set; }

        [Display(Name = "Deposit Type")]
        public string Deposittype { get; set; }

        [Display(Name = "8-Ball %")]
        public float? eight_Ball { get; set; }

        [DataType(DataType.Text)]
        [StringLength(maximumLength: 50)]
        [Display(Name = "Location")]
        public string location { get; set; }

        [Display(Name = "Lifetime")]
        public float? lifetime { get; set; }

        [Display(Name = "Master")]
        public bool master { get; set; }

        [DataType(DataType.Text)]
        [StringLength(maximumLength: 50)]
        public string Agent { get; set; }

        [Display(Name = "B-Line")]
        public bool b_line { get; set; }

        [DataType(DataType.MultilineText)]
        [StringLength(maximumLength: 1020)]
        [Display(Name = "Notes")]
        public string notes { get; set; }

        [Required]
        public string Status { get; set; }

        [Required]

        public string Category { get; set; }

        [Display(Name = "Submitted")]
        public DateTime? date { get; set; }

        public string Office { get; set; }

        [Display(Name = "Submitted By")]
        public string User { get; set; }

        [Display(Name = "Last Updated By")]
        public string User_LastUp { get; set; }

        [DataType(DataType.MultilineText)]
        [StringLength(maximumLength: 200)]
        [Required]
        [Display(Name = "Submit Notes")]
        public string shortNotes { get; set; }

        [RegularExpression(@"\b(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b",
            ErrorMessage = "Enter a valid IP format.")]
        [Display(Name = "IP Address")]
        public string ip_Address { get; set; }

        public bool? state { get; set; }

        [Display(Name = "Monitor Date")]
        public DateTime? monitorDate { get; set; }

        [Display(Name = "RFCheck Date")]
        public DateTime? RFCheckDate { get; set; }

        public string categoryMultiple { get; set; }

        public PlayerDisplay()
        {
        }
    }

来自Chrome开发者工具的标题信息：

Remote Address:xx.0.222.114:48
Request URL:http://crislife.im.priv:48/playermonitor/PlayerMonitor/EditPlayer
Request Method:POST
Status Code:500 Internal Server Error
Request Headersview source
Accept:*/*
Accept-Encoding:gzip,deflate
Accept-Language:en-US,en;q=0.8,es;q=0.6
Connection:keep-alive
Content-Length:599
Content-Type:application/json
Cookie:ASP.NET_SessionId=h40g5ar5yhrfgfsv4re1l0a1
Host:crislife.im.priv:48
Origin:http://crislife.im.priv:48
Referer:http://crislife.im.priv:48/playermonitor/
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.104 Safari/537.36
X-Requested-With:XMLHttpRequest
Request Payload
Category=8Ball+Edge&Status=Ready+for+Check&Deposittype=Money+Bookers&Office=BETCRIS+INT+BKR&Agent=my+agentsssd&master=true&link_Iovation=soelinkssssss&eight_Ball=1&location=earthssssss&lifetime=2&ip_Address=123.123.123.125&b_line=true&notes=awesome+new+notesssssss5s&account=NEWAWESOME&state=True&monitorDate=9%2F24%2F2014+3%3A50%3A12+PM&shortNotes=quick%2Fnew+notes%2Fsome+more+notes%2Fandmorenotes%2Fjl%3Bjkl%3Bjasdf%2Fadding+to+it&RFCheckDate=9%2F24%2F2014+3%3A50%3A12+PM&date=9%2F22%2F2014+9%3A33%3A01+AM&User=ADEN&User_LastUp=ADEN&categoryMultiple=8Ball+Edge%2CFraud+Check%2CNew+Deposit%2CSharp
Response Headersview source
Cache-Control:private
Content-Length:11536
Content-Type:text/html; charset=utf-8
Date:Mon, 20 Oct 2014 21:45:43 GMT
Server:Microsoft-IIS/7.5
X-AspNet-Version:4.0.30319
X-Powered-By:ASP.NET

我得到的错误是：

 [ArgumentException: Invalid JSON primitive: Category.]   
System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializePrimitiveObject() +745   
System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeInternal(Int32 depth) +362   
System.Web.Script.Serialization.JavaScriptObjectDeserializer.BasicDeserialize(String input, Int32 depthLimit, JavaScriptSerializer serializer) +115   
System.Web.Script.Serialization.JavaScriptSerializer.Deserialize(JavaScriptSerializer serializer, String input, Type type, Int32 depthLimit) +49   
System.Web.Mvc.JsonValueProviderFactory.GetValueProvider(ControllerContext controllerContext) +242   
System.Web.Mvc.<>c__DisplayClassc.<GetValueProvider>b__7(ValueProviderFactory factory) +28   
System.Linq.WhereSelectEnumerableIterator`2.MoveNext() +248   
System.Linq.WhereSelectEnumerableIterator`2.MoveNext() +165   
System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) +536   
System.Linq.Enumerable.ToList(IEnumerable`1 source) +80   
System.Web.Mvc.ValueProviderFactoryCollection.GetValueProvider(ControllerContext controllerContext) +347   
System.Web.Mvc.ControllerBase.get_ValueProvider() +66   
System.Web.Mvc.ControllerActionInvoker.GetParameterValue(ControllerContext controllerContext, ParameterDescriptor parameterDescriptor) +81   
System.Web.Mvc.ControllerActionInvoker.GetParameterValues(ControllerContext controllerContext, ActionDescriptor actionDescriptor) +153   
System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__1e(AsyncCallback asyncCallback, Object asyncState) +955  
 System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +146   
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag, Int32 timeout) +166   
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag) +27   
System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__17(AsyncCallback asyncCallback, Object asyncState) +50   
System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +146   
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag, Int32 timeout) +166   
System.Web.Mvc.Controller.BeginExecuteCore(AsyncCallback callback, Object state) +497   
System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +146   
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag, Int32 timeout) +166   
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate endDelegate, Object tag) +27   
System.Web.Mvc.Controller.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +409   
System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__2(AsyncCallback asyncCallback, Object asyncState) +144   
System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +146   
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag, Int32 timeout) +166   
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate endDelegate, Object tag) +27   
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +364   
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +12650919   
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +288

只有当我将其发布到网站时，才会发生这种情况。当我在调试模式下运行它时，一切都正常运行。另外，我还有其他与之完全相同的ajax帖子，这些帖子都可以正常工作。

---

当我删除contentType:application/json和dataType:json时，我会得到一个空引用异常。我已经检查了很多次，它正在捕获表单中的所有字段。

您缺少显示javascript变量myPlayer是什么的代码请参见[SO post][1]。[1] ：谢谢ps2Goat，我错过了添加。我现在已经添加了它。基本上，它只是一个var myPlayer=$editForm.serialize；谢谢你的链接，文卡特。我试过那张单子上的每一样东西，但都不走运。问题是，我的代码在调试模式下运行平稳。当我把它发布到网站上时，它给了我那个错误。我有多个操作，我用Ajax调用了大部分（如果不是全部的话）操作，它们的编码方式基本相同。其他的都能用。

 [ArgumentException: Invalid JSON primitive: Category.]   
System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializePrimitiveObject() +745   
System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeInternal(Int32 depth) +362   
System.Web.Script.Serialization.JavaScriptObjectDeserializer.BasicDeserialize(String input, Int32 depthLimit, JavaScriptSerializer serializer) +115   
System.Web.Script.Serialization.JavaScriptSerializer.Deserialize(JavaScriptSerializer serializer, String input, Type type, Int32 depthLimit) +49   
System.Web.Mvc.JsonValueProviderFactory.GetValueProvider(ControllerContext controllerContext) +242   
System.Web.Mvc.<>c__DisplayClassc.<GetValueProvider>b__7(ValueProviderFactory factory) +28   
System.Linq.WhereSelectEnumerableIterator`2.MoveNext() +248   
System.Linq.WhereSelectEnumerableIterator`2.MoveNext() +165   
System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) +536   
System.Linq.Enumerable.ToList(IEnumerable`1 source) +80   
System.Web.Mvc.ValueProviderFactoryCollection.GetValueProvider(ControllerContext controllerContext) +347   
System.Web.Mvc.ControllerBase.get_ValueProvider() +66   
System.Web.Mvc.ControllerActionInvoker.GetParameterValue(ControllerContext controllerContext, ParameterDescriptor parameterDescriptor) +81   
System.Web.Mvc.ControllerActionInvoker.GetParameterValues(ControllerContext controllerContext, ActionDescriptor actionDescriptor) +153   
System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__1e(AsyncCallback asyncCallback, Object asyncState) +955  
 System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +146   
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag, Int32 timeout) +166   
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag) +27   
System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__17(AsyncCallback asyncCallback, Object asyncState) +50   
System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +146   
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag, Int32 timeout) +166   
System.Web.Mvc.Controller.BeginExecuteCore(AsyncCallback callback, Object state) +497   
System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +146   
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag, Int32 timeout) +166   
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate endDelegate, Object tag) +27   
System.Web.Mvc.Controller.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +409   
System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__2(AsyncCallback asyncCallback, Object asyncState) +144   
System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +146   
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag, Int32 timeout) +166   
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate endDelegate, Object tag) +27   
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +364   
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +12650919   
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +288