有一个更简单的方法从文件或从Web获取JSON: Json.Net.Curl

安装包Json.Net.Curl

// get JObject from local file system 
var json = Json.Net.Curl.Get(@"data\JObjectUnitTest1.json");
var json = await Json.Net.Curl.GetAsync(@"data\JObjectUnitTest1.json")


// get JObject from Server  
var json = await Json.Net.Curl.GetAsync("http://myserver.com/data.json");

GitHub项目 Nuget

Doing this yourself is an awful idea. Use Json.NET. It has already solved the problem better than most programmers could if they were given months on end to work on it. As for your specific needs, parsing into arrays and such, check the documentation, particularly on JsonTextReader. Basically, Json.NET handles JSON arrays natively and will parse them into strings, ints, or whatever the type happens to be without prompting from you. Here is a direct link to the basic code usages for both the reader and the writer, so you can have that open in a spare window while you're learning to work with this.

这是最好的:这次偷懒，使用一个库，这样你就永远解决了这个常见的问题。

.NET核心的答案

你可以使用内置的System.Text.Json而不是第三方的Json.NET。为了促进重用，json文件读取功能属于自己的类，应该是泛型的，而不是硬编码为某种类型(Item)。下面是一个完整的例子:

using System;
using System.IO;
using System.Text.Json;
using System.Threading.Tasks;

namespace Project
{
    class Program
    {
        static async Task Main()
        {
            Item item = await JsonFileReader.ReadAsync<Item>(@"C:\myFile.json");
        }
    }

    public static class JsonFileReader
    {
        public static async Task<T> ReadAsync<T>(string filePath)
        {
            using FileStream stream = File.OpenRead(filePath);
            return await JsonSerializer.DeserializeAsync<T>(stream);
        }
    }

    public class Item
    {
        public int millis;
        public string stamp;
        public DateTime datetime;
        public string light;
        public float temp;
        public float vcc;
    }
}

或者，如果你更喜欢简单的/同步的:

class Program
{
    static void Main()
    {
        Item item = JsonFileReader.Read<Item>(@"C:\myFile.json");
    }
}

public static class JsonFileReader
{
    public static T Read<T>(string filePath)
    {
        string text = File.ReadAllText(filePath);
        return JsonSerializer.Deserialize<T>(text);
    }
}

有一个更简单的方法从文件或从Web获取JSON: Json.Net.Curl

安装包Json.Net.Curl

// get JObject from local file system 
var json = Json.Net.Curl.Get(@"data\JObjectUnitTest1.json");
var json = await Json.Net.Curl.GetAsync(@"data\JObjectUnitTest1.json")


// get JObject from Server  
var json = await Json.Net.Curl.GetAsync("http://myserver.com/data.json");

GitHub项目 Nuget

非常简单的方法，我发现在网上工作。json文件在c#(或任何其他编程语言)

先决条件:-

安装Newtonsoft。Json库到你的项目 Newtonsoft。Json

网址是> https://app.quicktype.io/

步骤

1>去这个URL - https://app.quicktype.io/

复制并粘贴您的JSON文件结构到左侧侧边栏

app.quicktype.io

3>在选项菜单中选择所需语言(这里是c#)

复制生成的代码并转到您的项目并创建一个同名的新.cs文件(这里是“Welcome.cs”)

Welcome.cs

将所有生成的代码粘贴到新创建的类中。

欢迎。cs粘贴代码

6>，就是这样。：）

获取价值的步骤

进入主程序。cs文件或任何你需要访问它的地方。

class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("Access Json values using Keys.>");

        String jsonString = new StreamReader("give <.json> file Path here").ReadToEnd();

        // use below syntax to access JSON file
        var jsonFile = Welcome.FromJson(jsonString);

        string FileName = jsonFile.File;
        long Lvl = jsonFile.Level;
        bool isTrue = jsonFile.CSharp;

        Console.WriteLine(FileName);//JSON
        Console.WriteLine(Lvl);//1
        Console.WriteLine(isTrue);//true
    }
}

string jsonFilePath = @"C:\MyFolder\myFile.json";
            
string json = File.ReadAllText(jsonFilePath);
Dictionary<string, object> json_Dictionary = (new JavaScriptSerializer()).Deserialize<Dictionary<string, object>>(json);

foreach (var item in json_Dictionary)
{
    // parse here
}