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

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

.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);
    }
}

为我找到了正确的道路

   var pathToJson = Path.Combine("my","path","config","default.Business.Area.json");
   var r = new StreamReader(pathToJson);
   var myJson = r.ReadToEnd();

   // my/path/config/default.Business.Area.json 
   [...] do parsing here 

路径。Combine使用路径。它检查第一个路径的末尾是否已经有分隔符，这样它就不会复制分隔符。此外，它还检查要组合的路径元素是否具有无效字符。

参见https://stackoverflow.com/a/32071002/4420355

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。

有一种更快的解析json的方法。网如果你使用的是。net core 3.0或更高版本，那么你可以使用System.Text.Json nuget包来序列化或反序列化。

您需要补充:

using System.Text.Json

然后你可以序列化为:

var jsonStr = JsonSerializer.Serialize(model);

反序列化为:

var model = JsonSerializer.Deserialize(jsonStr);