C#基础---C#如何对Json字符串处理

2019-11-14 16:26:04

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　　　　Json字符串对于做web应用的应该很熟悉，其实在很多请求我们返回的都是Json字符串。那对于C#代码如何处理Json字符串呢，.Net封装了一个类叫做javaScriptSerializer[MSDN Library 链接http://msdn.microsoft.com/en-us/library/ee191864(v=vs.110).aspx]；这个类提供了一个方法。

下面这个是我在快递100往抓取的一个圆通的快递信息。对于我们有用的信息是快递时间，快递状况。那我该如何来做。　

{"message":"ok","nu":"9356359685","ischeck":"1","com":"yuantong","status":"200","condition":"F00","state":"3","data":[{"time":"2014-09-01 21:19:06","context":"甘肃省武威市公司已签收 ","ftime":"2014-09-01 21:19:06"},{"time":"2014-09-01 09:09:28","context":"甘肃省武威市公司派件中 ","ftime":"2014-09-01 09:09:28"},{"time":"2014-09-01 09:06:27","context":"甘肃省武威市公司已收入 ","ftime":"2014-09-01 09:06:27"},{"time":"2014-08-31 19:53:47","context":"甘肃省兰州市公司已发出 ","ftime":"2014-08-31 19:53:47"},{"time":"2014-08-31 19:17:41","context":"甘肃省兰州市公司已收入 ","ftime":"2014-08-31 19:17:41"},{"time":"2014-08-28 23:44:26","context":"广东省深圳市横岗公司已打包 ","ftime":"2014-08-28 23:44:26"},{"time":"2014-08-28 23:19:12","context":"广东省深圳市横岗公司已收件 ","ftime":"2014-08-28 23:19:12"},{"time":"2014-08-28 21:55:35","context":"广东省深圳市横岗公司已收件 ","ftime":"2014-08-28 21:55:35"}]}

1. 首先分析Json字符串结构. Json{ message,nu,isCheck,Data{time,context,ftime}};我们先定义一个类，取名为PostalDeliveryModel，类名的结构需要与Json结构对应，名称需要保持一样[忽略大小写],其次对应的字段说会自动转换类型的，类型如果不符合会抛出异常

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace TestJson{    public class PostalDeliveryModel    {        PRivate string message = string.Empty;        private string nu = string.Empty;        private List<SingalData> data = new List<SingalData>();        // Puclic的名字需要与Json字符串相同,但是忽略大小写        public string Message         {            get { return this.message; }            set { this.message = value; }        }        public string Nu        {            get { return this.nu; }            set { this.nu = value; }        }        public List<SingalData> Data        {            get { return this.data; }            set { this.data = value; }        }    }    public class SingalData    {        private DateTime time = System.DateTime.Now;        private string context = string.Empty;        private DateTime ftime = System.DateTime.Now;        public DateTime Time        {            get { return this.time; }            set { this.time = value; }        }        public DateTime FTime        {            get { return this.ftime; }            set { this.ftime = value; }        }        public string Context        {            get { return this.context; }            set { this.context = value; }        }    }}

2.对象什么好后只需要调用方法即可:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.IO;using System.Web.Script.Serialization; // 此命名空间对应的框架是 System.Web.Extensionsnamespace TestJson{    public class Program    {               public static void Main(string[] args)        {            string jsonStr = new StreamReader("JsonData.txt").ReadToEnd();            PostalDeliveryModel mode = new JavascriptSerializer().Deserialize<PostalDeliveryModel>(jsonStr);            Console.ReadKey();                    }    }}