C#處理Json字符串實例分析

2020-01-24 02:08:43

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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?！?/p>

復制代碼代碼如下:

{"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

復制代碼代碼如下:

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:

復制代碼代碼如下:

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.Extensions
namespace 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();
        }
    }
}