如何JSON字符串映射到C＃方法的调用 [英] How to map JSON string to the calling of C# method

问题描述

我想实现一个框架，以JSON字符串映射到C＃方法的调用。例如，我有一个C＃类计算器定义如下：

I want to implement a framework to map JSON string to the calling of C# method. For example, I have a C# class Calculator defined as below.

// C# class
class Calculator
{
public:
    int add (int x, int y);
    int sub (int x, int y);
}

有如下JSON字符串。当框架接收这个字符串，它创建类计算器/新的对象。然后调用它的功能添加。并通过价值12和43的功能参数。

There is a JSON string as below. When the framework receives this string, it creates/new an object of class Calculator. Then call its function add. And pass the value 12 and 43 to the function as parameters.

// JSON string
"{
\"class\":\"Calculator\",
\"method\":\"add\",
\"parameters\": {
    \"x\" : \"12\", \"y\" : \"43\"
    }
}"

是否有任何第三方的库来实现这一点？或者，我如何才能通过自己实现它？

Is there any 3rd party library to implement this? Or how can I implement it by myself?

推荐答案

一个小型的工作样本。当然，许多支票丢失。 （使用 Json.Net ）

A small working sample. Of course many checks are missing. (Using Json.Net)

string jsonstring = "{\"class\":\"Calculator\",\"method\":\"add\",\"parameters\": { \"x\" : \"12\", \"y\" : \"43\" }}";

var json = (JObject)JsonConvert.DeserializeObject(jsonstring);

Type type = Assembly.GetExecutingAssembly()
                    .GetTypes()
                    .First(t => t.Name==(string)json["class"]);

object inst = Activator.CreateInstance(type);
var method =  type.GetMethod((string)json["method"]);
var parameters = method.GetParameters()
        .Select(p => Convert.ChangeType((string)json["parameters"][p.Name], p.ParameterType))
        .ToArray();
var result =  method.Invoke(inst, parameters);

var toReturn = JsonConvert.SerializeObject(new {status="OK",result=result });

-

-

class Calculator
{
    public int add(int x, int y)
    {
        return x + y;
    }
}

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