C#简单操作json文件
一、json格式简介
就是键值对形式,{}是对象,[]是数组,相互组合构建。
示例文件Untitled-1.json
{ "unitinfo": [ { "name": "unit1", "bearing": { "1": "1,2", "2": "3,4", "3": "5,6", "4": "7,8", "5": "9,10", "6": "11,12", "7": "13,14", "8": "15,16" }, "modules": "path1" }, { "name": "unit2", "bearing": { "1": "aaa", "2": "bbb", "3": "ccc", "4": "ddd", "5": "eee", "6": "fff", "7": "fff", "8": "fff" }, "modules": "path3" } ], "equipmentinfo":[{ "name":"a1", "model":"patha1" }] }
二、引入Newtonsoft.Json
右击引用,在NuGet程序包中搜索下载
三、读取操作的代码
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Newtonsoft.Json; using Newtonsoft.Json.Linq; using System.IO; namespace ConsoleApp2 { class Program { static void Main(string[] args) { string filepath = @"C:\Users\Administrator\source\repos\ConsoleApp2\Untitled-1.json"; using (StreamReader file=new StreamReader(filepath)) { using (JsonTextReader reader=new JsonTextReader(file)) { JObject jobj = (JObject)JToken.ReadFrom(reader); Console.WriteLine("最上层对象总数:"+jobj.Count); var j1 = jobj["unitinfo"];//按键值对的用法取键为"unitinfo"的值 Console.WriteLine("unitinfo数组长度:"+j1.Count());//JToken对象没有Count属性,但有Count()方法 //"unitinfo"的值是一个数组,遍历数组 foreach (var item in j1) { Console.WriteLine("组别:"+item["name"]); var ib = item["bearing"];//取键为"bearing"的值 Console.WriteLine("bearing值对象内属性的总数:"+ib.Count());//取 //"bearing"的值是对象,也可以遍历,将子对象转成JProperty类型,就可以获取键值name/value foreach (JProperty item2 in item["bearing"]) { Console.WriteLine("键为"+item2.Name+"值为" + item2.Value); } } } } Console.ReadKey(); } } }
运行结果:
四、修改操作
待续...