DefaultModelBinder无法将作为JSON对象传递给操作的.NET字典对象反序列化? [英] DefaultModelBinder cannot deserialize .NET Dictionary object passed to an action as a JSON object?

问题描述

我有一堂很简单的课:

public class FilterItem
{
    public Dictionary<string, string> ItemsDictionary { get; set; }

    public FilterItem()
    {
        ItemsDictionary = new Dictionary<string, string>();
    }
}

我想在客户端的字典中填充数据，然后将其作为JSON对象传递给我的控制器操作.但是，无论我在客户端上尝试什么，DefaultModelBinder似乎都无法将其反序列化.

I want to populate the data in the dictionary on the client and then pass it to my controller action as a JSON object. However no matter what I try on the client, the DefaultModelBinder does not seem to be able to deserialize it.

这是一个示例JavaScript代码，用于调用我的操作:

Here is an example javascript code to call my action:

var simpleDictionary = {"ItemsDictionary": {"1": "5", "2": "7"}};

$.ajax({ cache: false, type: "POST", data: JSON.stringify(simpleDictionary),
contentType: "application/json; charset=utf-8", 
url: "/Catalog7Spikes/GetFilteredProductsJson", success: function (data) {...});

这是我的操作方法的简化版本:

And here is a simplified version of my action method:

[HttpPost]
public ActionResult GetFilteredProductsJson(FilterItem filterItem)
{   
    ProductsModel productsModel = new ProductsModel();
    return View("SevenSpikes.Nop.UI.Views.Products", productsModel);
}

请注意相反的方法.当作为JsonResult传递时，FilterItem对象已成功序列化并作为JSON对象传递给客户端.但是，尝试以相反的方式行不通.

Please note that the opposite works. When passed as a JsonResult the FilterItem object is successfully serialized and passed as a JSON object to the client. However trying to go the other way round does not work.

我阅读了

I read the ticket on Connect and thought that the work around would work but it does not.

使用ASP.NET MVC 3中的DefaultModelBinder可以完全反序列化.NET词典吗?

Is it possible at all to deserialize a .NET dictionary using the DefaultModelBinder in ASP.NET MVC 3?

推荐答案

汉塞尔曼(Hanselman)谈到:

Hanselman talks about this:

来源: http://www.hanselman.com/blog/ASPNETWireFormatForModelBindingToArraysListsCollectionsDictionaries.aspx

DefaultModelBinder期望字典的语法不尽人意.尝试使用这种语法:

The DefaultModelBinder expects some less-than-optimal syntax for dictionaries. Try using this kind of syntax:

 {
 "dictionary[0]":{"Key":"a", "Value":"b"},
 "dictionary[1]":{"Key":"b", "Value":"b"}
 }

有点笨重，但可以绑定.以下方法也可以，但是我个人更喜欢上面的方法；它更短.

It's kind of bulky but it binds. The following works as well, but I personally prefer the above; it's shorter.

 {
 "dictionary[0].Key":"a",
 "dictionary[0].Value":"b",
 "dictionary[1].Key":"b"
 "dictionary[1].Value":"b"
 }

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