如何返回JSON对象 [英] How to return JSon object

问题描述

我使用的是jQuery插件，需要一个JSON对象具有以下结构（我会从检索数据库中的值）：

I am using a jQuery plugin that need a JSON object with following structure(I will be retrieving the values from database):

{ results: [
    { id: "1", value: "ABC", info: "ABC" },
    { id: "2", value: "JKL", info: "JKL" },
    { id: "3", value: "XYZ", info: "XYZ" }
] }

下面是我的类：

public class results
{
    int _id;
    string _value;
    string _info;

    public int id
    {
        get
        {
            return _id;
        }
        set
        {
            _id = value;
        }
    }
    public string value
    {
        get
        {
            return _value;
        }
        set
        {
            _value = value;
        }
    }
    public string info
    {
        get
        {
            return _info;
        }
        set
        {
            _info = value;
        }
    }
}

这是我序列的方式：

results result = new results();
result.id = 1;
result.value = "ABC";
result.info = "ABC";
string json = JsonConvert.SerializeObject(result);

但是，这将只返回一行。能否请你帮我返回不止一个结果？我怎样才能得到的结果在上述指定的格式？

But this will return only one row. Can you please help me in returning more than one result? How can I get the result in the format specified above?

推荐答案

首先，有的没有这样的东西作为一个JSON对象。你已经得到了你的问题是一个JavaScript对象文字（请参阅here有关差异的大讨论）。这里是你将如何去序列化，你得JSON虽然什么：

First of all, there's no such thing as a JSON object. What you've got in your question is a JavaScript object literal (see here for a great discussion on the difference). Here's how you would go about serializing what you've got to JSON though:

我会用匿名类型充满了你的结果类型：

I would use an anonymous type filled with your results type:

string json = JsonConvert.SerializeObject(new
{
    results = new List<Result>()
    {
        new Result { id = 1, value = "ABC", info = "ABC" },
        new Result { id = 2, value = "JKL", info = "JKL" }
    }
});

此外，请注意，生成的JSON与 ID S型编号而不是字符串的结果项目。我怀疑这将是一个问题，但它会很容易 ID 的类型更改为字符串在C＃。

Also, note that the generated JSON has result items with ids of type Number instead of strings. I doubt this will be a problem, but it would be easy enough to change the type of id to string in the C#.

我也想调整你的结果键入和摆脱后盾字段：

I'd also tweak your results type and get rid of the backing fields:

public class Result
{
    public int id { get ;set; }
    public string value { get; set; }
    public string info { get; set; }
}

此外，传统的类是 PascalCased ，而不是驼峰格式。

下面从上面的code是生成的JSON：

Here's the generated JSON from the code above:

{
  "results": [
    {
      "id": 1,
      "value": "ABC",
      "info": "ABC"
    },
    {
      "id": 2,
      "value": "JKL",
      "info": "JKL"
    }
  ]
}

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