asp.net mvc4将无法正确反序列化并绑定Dictionary <string，list <customtype>＆gt;来自json </string，list <customtype>

Question

JSON.NET反序列化很好，但无论mvc用于控制器参数绑定barfs很难。我可以做任何其他事情来完成这项工作吗？

位：

  public partial class Question
  {
    public Dictionary<string, List<QuestionExtendedProp>> TemporaryExtendedProperties { get; set; }
  }

控制器方法

[HttpPost]
public JsonResult SaveQuestions(Question[] questions)
{
  var z =
    JsonConvert.DeserializeObject(
      "{'Options':[{'PropKey':'asdfasd','PropVal':'asdfalkj'},{'PropKey':'fdsafdsafasdfas','PropVal':'fdsafdas'}]}",
      typeof (Dictionary<string, List<QuestionExtendedProp>>)) as Dictionary<string, List<QuestionExtendedProp>>;
  //this deserializes perfectly. z is exactly what I want it to be
  //BUT, questions is all wrong. See pic below

  //lots of code snipped for clarity, I only care about the incoming questions object
  return Utility.Save(questions);
}

这就是MVC为我提供的精确字符串（从小提琴手中拉出来，为你的阅读乐趣而剪辑）

    "TemporaryExtendedProperties":{"Options": 
        [{"PropKey":"NE","PropVal":"NEBRASKA"}, 
         {"PropKey":"CORN","PropVal":"CHILDREN OF"}, 
         {"PropKey":"COW","PropVal":"MOO"}]}

为什么MVC会破坏这个完美的json字符串的绑定，我怎么能不这样做呢？我完全控制了json结构和创建。

修改
我尝试将Question.TemporaryExtendedProperties的类型更改为List<KeyValuePair<string, List<QuestionExtendedProp>>>，但这也不起作用。这是新的json（它与System.Web.Script.Serialization.JavaScriptSerializer序列化对象的确切匹配！）

{
   TemporaryExtendedProperties: [
      {
         Key: 'Options',
         Value: [
            {
               PropKey: 'NEBRASKA',
               PropVal: 'NE'
            },
            {
               PropKey: 'DOG',
               PropVal: 'CORN'
            },
            {
               PropKey: 'MEOW???',
               PropVal: 'COW'
            }
         ]
      }
   ]
}

这也不起作用。控制器将其反序列化为List<blah,blah>，计数为1（按预期方式），但Key和Value均为null。 Json.NET再次完美地处理它。

呃。

Answer 1

我最终只是删除了字典的需要。新代码如下所示：

//Other half is autogenerated by EF in models folder
public partial class Question
{
    public List<QuestionExtendedProp> TemporaryExtendedProperties { get; set; }
}

//Other half is autogenerated by EF in models folder
public partial class QuestionExtendedProp
{
    public string DictionaryKeyValue { get; set; }
}

mvc处理这个很好。我的控制器现在看起来像这样

[HttpPost]
public JsonResult SaveQuestions(Question[] questions)
{

  foreach (var q in questions)
  {
    //do regular question processing stuff
    //20 lines later
    IEnumerable<IGrouping<string, QuestionExtendedProp>> ExtendedPropGroups = q.TemporaryExtendedProperties.GroupBy(x => x.DictionaryKeyValue);
    foreach (IGrouping<string, QuestionExtendedProp> group in ExtendedPropGroups)
    {
      string groupKey = group.Key;
      foreach (var qexp in group)
      {
        //do things here
      }
    }
  }
  //rest of the stuff now that I've processed my extended properties...properly
  return Utility.SaveQuestions(questions);
}