C# 如何返回 JSon 对象
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How to return JSon object
提问by user1640256
I am using a jQuery plugin that need a JSON object with following structure(I will be retrieving the values from database):
我正在使用一个需要具有以下结构的 JSON 对象的 jQuery 插件（我将从数据库中检索值）：
{ results: [
{ id: "1", value: "ABC", info: "ABC" },
{ id: "2", value: "JKL", info: "JKL" },
{ id: "3", value: "XYZ", info: "XYZ" }
] }
Here is my class:
这是我的课：
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;
}
}
}
This is the way I serialize it:
这是我序列化它的方式：
results result = new results();
result.id = 1;
result.value = "ABC";
result.info = "ABC";
string json = JsonConvert.SerializeObject(result);
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?
但这只会返回一行。你能帮我返回一个以上的结果吗？我怎样才能得到上面指定的格式的结果？
回答by ShaneBlake
You only have one row to serialize. Try something like this :
您只有一行要序列化。尝试这样的事情：
List<results> resultRows = new List<results>
resultRows.Add(new results{id = 1, value="ABC", info="ABC"});
resultRows.Add(new results{id = 2, value="XYZ", info="XYZ"});
string json = JavaScriptSerializer.Serialize(new { results = resultRows});
- Edit to match OP's original json output
- 编辑以匹配 OP 的原始 json 输出
** Edit 2 : sorry, but I missed that he was using JSON.NET. Using the JavaScriptSerializerthe above code produces this result :
** 编辑 2 ：抱歉，我错过了他正在使用 JSON.NET。使用JavaScriptSerializer上面的代码产生这个结果：
{"results":[{"id":1,"value":"ABC","info":"ABC"},{"id":2,"value":"XYZ","info":"XYZ"}]}
回答by Andrew Whitaker
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 herefor a great discussion on the difference). Here's how you would go about serializing what you've got to JSON though:
首先，没有 JSON 对象这样的东西。您在问题中得到的是 JavaScript 对象文字（有关差异的精彩讨论，请参见此处）。以下是您将如何序列化您所拥有的 JSON 内容的方法：
I would use an anonymous type filled with your resultstype:
我会使用一个用你的results类型填充的匿名类型：
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" }
}
});
Also, note that the generated JSON has result items with ids of type Numberinstead of strings. I doubt this will be a problem, but it would be easy enough to change the type of idto stringin the C#.
另请注意，生成的 JSON 具有id类型Number为s而不是字符串的结果项。我怀疑这将是一个问题，但它是很容易的改变的类型id，以string在C＃。
I'd also tweak your resultstype and get rid of the backing fields:
我还会调整您的results类型并摆脱支持字段：
public class Result
{
public int id { get ;set; }
public string value { get; set; }
public string info { get; set; }
}
Furthermore, classes conventionally are PascalCasedand not camelCased.
此外，类通常是PascalCased和不是camelCased。
Here's the generated JSON from the code above:
这是从上面的代码生成的 JSON：
{
"results": [
{
"id": 1,
"value": "ABC",
"info": "ABC"
},
{
"id": 2,
"value": "JKL",
"info": "JKL"
}
]
}
