C# JSON简单测试

 1 using Newtonsoft.Json;
 2 using System;
 3 using System.Collections.Generic;
 4 using System.IO;
 5 using System.Text.Json.Serialization;
 6 
 7 namespace TestJSON
 8 {
 9     internal class Program
10     {
11         static void Main(string[] args)
12         {
13             Console.WriteLine("读取 data.json");
14             string jsonString = File.ReadAllText("data.json");
15             List<Item> myList = JsonConvert.DeserializeObject<List<Item>>(jsonString);
16             if (myList == null)
17             {
18                 myList = new List<Item>();
19             }
20             string input = "0";
21             int inputInt = 0;
22             string inputString = "";
23             while (input != "q")
24             {
25                 Console.WriteLine("按'a'加项");
26                 Console.WriteLine("按'd'加项");
27                 Console.WriteLine("按's'加项");
28                 Console.WriteLine("按'q'加项");
29                 Console.WriteLine("按空格：");
30                 input = Console.ReadLine().ToLower();
31                 switch (input)
32                 {
33                     case "a":
34                         Console.WriteLine("新加一项");
35                         Console.WriteLine("输入要增加名字：");
36                         inputString = Console.ReadLine();
37                         Console.WriteLine("请输入价格");
38                         inputInt = Convert.ToInt32(Console.ReadLine());
39                         myList.Add(new Item(inputString, inputInt));
40                         Console.WriteLine("新增加"+inputString+"价格"+inputInt);
41                         break;
42                     case "d":
43                         Console.WriteLine("删除一项");
44                         Console.WriteLine("输入要删除名字：");
45                         inputString = Console.ReadLine();
46                         myList.Remove(new Item(inputString));
47                         break;
48                     case "s":
49                         Console.WriteLine("\n 显示每项");
50                         foreach (var item in myList)
51                         {
52                             Console.WriteLine("Item:"+item.Name+"|$"+item.Price);
53                         }
54                         Console.WriteLine("\n");
55                         break;
56                     case "q":
57                         Console.WriteLine("退出");
58                         break;
59                     default:
60                         Console.WriteLine("重新测试"); 
61                         break;
62                 }
63             }
64             Console.WriteLine("开始写入 data.Json");
65             string data= JsonConvert.SerializeObject(myList);
66             File.WriteAllText("data.json",data);
67             Console.WriteLine("写入完成");
68         }
69     }
70 }

using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Text;

namespace TestJSON
{
    public class Item : IEquatable<Item>
    {
        public string Name;
        public int Price;

        public Item(string name, int price =0)
        {
            this.Name = name;
            this.Price = price;
        }
        public bool Equals(Item other)
        {
            if (other == null) return false;
            return Name.Equals(other.Name);

        }
    }
}

[{"Name":"ham","Price":1000000},{"Name":"huotuo","Price":20},{"Name":"xiao","Price":1},{"Name":"binggan","Price":12}]