C#基礎---C#如何對Json字符串處理

2019-11-14 16:26:04

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　　　　Json字符串對于做web應用的應該很熟悉，其實在很多請求我們返回的都是Json字符串。那對于C#代碼如何處理Json字符串呢，.Net封裝了一個類叫做javaScriptSerializer[MSDN Library 鏈接http://msdn.microsoft.com/en-us/library/ee191864(v=vs.110).aspx]；這個類提供了一個方法。

下面這個是我在快遞100往抓取的一個圓通的快遞信息。對于我們有用的信息是快遞時間，快遞狀況。那我該如何來做。　

{"message":"ok","nu":"9356359685","ischeck":"1","com":"yuantong","status":"200","condition":"F00","state":"3","data":[{"time":"2014-09-01 21:19:06","context":"甘肅省武威市公司已簽收 ","ftime":"2014-09-01 21:19:06"},{"time":"2014-09-01 09:09:28","context":"甘肅省武威市公司派件中 ","ftime":"2014-09-01 09:09:28"},{"time":"2014-09-01 09:06:27","context":"甘肅省武威市公司已收入 ","ftime":"2014-09-01 09:06:27"},{"time":"2014-08-31 19:53:47","context":"甘肅省蘭州市公司已發出 ","ftime":"2014-08-31 19:53:47"},{"time":"2014-08-31 19:17:41","context":"甘肅省蘭州市公司已收入 ","ftime":"2014-08-31 19:17:41"},{"time":"2014-08-28 23:44:26","context":"廣東省深圳市橫崗公司已打包 ","ftime":"2014-08-28 23:44:26"},{"time":"2014-08-28 23:19:12","context":"廣東省深圳市橫崗公司已收件 ","ftime":"2014-08-28 23:19:12"},{"time":"2014-08-28 21:55:35","context":"廣東省深圳市橫崗公司已收件 ","ftime":"2014-08-28 21:55:35"}]}

1. 首先分析Json字符串結構. Json{ message,nu,isCheck,Data{time,context,ftime}};我們先定義一個類，取名為PostalDeliveryModel，類名的結構需要與Json結構對應，名稱需要保持一樣[忽略大小寫],其次對應的字段說會自動轉換類型的，類型如果不符合會拋出異常

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的名字需要與Json字符串相同,但是忽略大小寫        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.對象什么好后只需要調用方法即可:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.IO;using System.Web.Script.Serialization; // 此命名空間對應的框架是 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();                    }    }}