MVC ajax json 发布到控制器操作方法

I am trying to achieve a JQuery AJAX call to a controller action method that contains a complex object as a parameter. I have read plenty blogs and tried several techniques learned from these. The key post on which I have constructed my best attempt code (below) is the stackoverflow post here .

我想触发异步POST，在用户按Tab键关闭字段时调用[不是表单保存POST-正如我发现的其他示例中所演示的那样].

我的意图是:

• 在客户机上实例化一个对象[而不是为视图提供类型的ViewModel]；
• 使用视图中多个字段的数据填充对象；
• Convert this object to JSON;
• 使用jQuery.Ajax方法调用控制器操作方法，传递JSON对象.

结果将作为JSON结果返回；数据将根据返回的结果加载到视图中的字段中.

The problems are:

• 如果action方法的属性是HttpPost属性，则不会调用控制器action方法(即使AJAX调用类型设置为"POST").
• If the action method isattributed with HttpGet, the values of properties of the parameter are null
• The ReadObject method throws the error: "Expecting element 'root' from namespace ''.. Encountered 'None' with name 'namespace'".

希望有人能帮上忙.谢谢.代码如下:

Client js file

 var disputeKeyDataObj = {
     "InvoiceNumber": "" + $.trim(this.value) + "",
     "CustomerNumber": "" + $.trim($('#CustomerNumber').val()) + ""
  };

  var disputeKeyDataJSON = JSON.stringify(disputeHeadlineData);      

  $.ajax({
     url: "/cnr/GetDataForInvoiceNumber",
     type: "POST",
     data: disputeKeyDataJSON,
     dataType: 'json',
     contentType: "application/json; charset=utf-8",
     success: EnrichedDisputeKeyData(result)
  });

Action Filter and class for the type associated with the Action method parameter

 [DataContract]  
 public class DisputeKeyData  
 {  
    [DataMember(Name = "InvoiceNumber")]  
    public string InvoiceNumber { get; set; }

    [DataMember(Name = "CustomerNumber")]
    public string CustomerNumber { get; set; }
 }  

Action method on the controller

  //[HttpPost]
  [ObjectFilter(Param = "disputeKeyData", RootType = typeof(DisputeKeyData))]  
  public ActionResult GetDataForInvoiceNumber(DisputeKeyData disputeKeyData)  
  {  
     //Blah!  
     //....  
     return Json(disputeKeyData, JsonRequestBehavior.AllowGet);  
  }