C#解析JSON数组

郦东桥 發表於 2019-7-17 13:19:00

<h1>方式一</h1>
<h2>第一步:使用前，需下载:Newtonsoft.Json.dll</h2>
没有的，请到我百度云盘下载
链接：https://pan.baidu.com/s/1JBkee4qhtW7XOyYFiGOL2Q  提取码：b5uq
<h2>第二步：引入命名空间：using Newtonsoft.Json;</h2>
<h2>第三步：封装一个函数，方便以后使用</h2>
待解析JSON数组
<img src="https://img2018.cnblogs.com/blog/1504448/201907/1504448-20190717131529930-1212210582.png" alt="">
函数：
<div class="cnblogs_code">
<pre> public static Newtonsoft.Json.Linq.JArray GetToJsonList(string json)
 {
 Newtonsoft.Json.Linq.JArray jsonArr = (Newtonsoft.Json.Linq.JArray)JsonConvert.DeserializeObject(json);
 return jsonArr;
 }</pre>
</div>
实现：
<img src="https://img2018.cnblogs.com/blog/1504448/201907/1504448-20190717131819324-1933650410.png" alt="">
搞定~
<h2>方式二(推荐)：</h2>
　　第一步就是要根据这个JSON来写出对应的实体类。用来存放数据。这个实体类如何写的？其实非常简单。因为一般不需要手动自己写，当然，你要是喜欢也可以自己写。不过我一般使用网站直接转换。自己百度查一下，JSON转C#实体类，就会有很多网站给你转。
　　我使用的是这个网站：http://www.bejson.com/convert/json2csharp/
<div class="cnblogs_code">
<pre>{"message":"ok","nu":"367847964498","ischeck":"1","condition":"F00","com":"shunfeng","status":"200","state":"3","data":[{"time":"2017-09-21 09:33:09","ftime":"2017-09-21 09:33:09","context":"已签收,感谢使用顺丰,期待再次为您服务","location":""},{"time":"2017-09-21 09:09:48","ftime":"2017-09-21 09:09:48","context":"快件交给巩向涛，正在派送途中（联系电话：18806439871）","location":""},{"time":"2017-09-21 07:02:41","ftime":"2017-09-21 07:02:41","context":"快件到达【淄博市桓台田庄速运营业点】","location":""},{"time":"2017-09-20 15:32:00","ftime":"2017-09-20 15:32:00","context":"快件在【淄博市桓台县工业街营业点】已装车，准备发往下一站","location":""},{"time":"2017-09-20 13:37:08","ftime":"2017-09-20 13:37:08","context":"快件到达【淄博市桓台县工业街营业点】","location":""},{"time":"2017-09-20 10:47:07","ftime":"2017-09-20 10:47:07","context":"快件在【淄博高新集散中心】已装车，准备发往下一站","location":""},{"time":"2017-09-20 10:15:47","ftime":"2017-09-20 10:15:47","context":"快件到达【淄博高新集散中心】","location":""},{"time":"2017-09-19 23:20:18","ftime":"2017-09-19 23:20:18","context":"快件在【深圳总集散中心】已装车，准备发往下一站","location":""},{"time":"2017-09-19 22:39:27","ftime":"2017-09-19 22:39:27","context":"快件到达【深圳总集散中心】","location":""},{"time":"2017-09-19 18:57:33","ftime":"2017-09-19 18:57:33","context":"快件在【深圳龙华新区华联社区营业部】已装车，准备发往下一站","location":""},{"time":"2017-09-19 16:12:21","ftime":"2017-09-19 16:12:21","context":"顺丰速运已收取快件","location":""}]}</pre>
</div>
　　 只需将JSON放到这个网站，自动给我们生成实体类即可
实体类：
<div class="cnblogs_code">
<pre> using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;

namespace WindowsFormsApplication1
 {

/// <summary>
 /// JSON数据的实体类
 /// </summary>
 public class Root
 {
 /// <summary>
 ///
 /// </summary>
 public string message { get; set; }
 /// <summary>
 ///
 /// </summary>
 public string nu { get; set; }
 /// <summary>
 ///
 /// </summary>
 public string ischeck { get; set; }
 /// <summary>
 ///
 /// </summary>
 public string condition { get; set; }
 /// <summary>
 ///
 /// </summary>
 public string com { get; set; }
 /// <summary>
 ///
 /// </summary>
 public string status { get; set; }
 /// <summary>
 ///
 /// </summary>
 public string state { get; set; }
 /// <summary>
 ///
 /// </summary>
 public List<DataItem> data { get; set; }
 }
 public class DataItem
 {
 /// <summary>
 ///
 /// </summary>
 public string time { get; set; }
 /// <summary>
 ///
 /// </summary>
 public string ftime { get; set; }
 /// <summary>
 /// 已签收,感谢使用顺丰,期待再次为您服务
 /// </summary>
 public string context { get; set; }
 /// <summary>
 ///
 /// </summary>
 public string location { get; set; }
 }

}</pre>
</div>
实体类创建好后，我们还需要一个DLL文件，Newtonsoft.Json.DLL,看方式一
封装一个方法
<div class="cnblogs_code">
<pre> /// <summary>
 /// 将JSON转字符串(包括数组)
 /// </summary>
 /// <typeparam name="T"></typeparam>
 /// <param name="json"></param>
 /// <returns></returns>
 public static T JsonConvertObject<T>(string json)
 {
 return JsonConvert.DeserializeObject<T>(json);
 }</pre>
</div>
调用即可
 
以下JSON帮助类
<div class="cnblogs_code">
<pre> using System.Collections.Generic;
 using System.IO;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 using System.Data;
 using System.Reflection;
 using System;

namespace Sam.OA.Common
 {
 /// <summary>
/// Json帮助类
 /// 使用前需引用开源项目类库：Newtonsoft.Json.dll
 /// </summary>
public sealed class JsonHelper
 {
 /// <summary>
 /// 将对象序列化为json格式
 /// </summary>
 /// <param name="obj">序列化对象</param>
 /// <returns>json字符串</returns>
 public static string SerializeObjct(object obj)
 {
 return JsonConvert.SerializeObject(obj);
 }
 /// <summary>
 /// 解析JSON字符串生成对象实体
 /// </summary>
 /// <typeparam name="T">实体类</typeparam>
 /// <param name="json">JSON字符串</param>
 /// <returns></returns>
 public static T JsonConvertObject<T>(string json)
 {
 return JsonConvert.DeserializeObject<T>(json);
 }
 /// <summary>
 /// 解析JSON字符串生成对象实体
 /// </summary>
 /// <typeparam name="T">对象类型</typeparam>
 /// <param name="json">json字符串</param>
 /// <returns></returns>
 public static T DeserializeJsonToObject<T>(string json) where T:class
 {
 JsonSerializer serializer = new JsonSerializer();
 StringReader sr = new StringReader(json);
 object obj = serializer.Deserialize(new JsonTextReader(sr), typeof(T));
 T t = obj as T;
 return t;
 }
 /// <summary>
 /// 解析JSON数组生成对象实体集合
 /// </summary>
 /// <typeparam name="T">对象类型</typeparam>
 /// <param name="json">json数组</param>
 /// <returns>对象实体集合</returns>
 public static List<T> DeserializeJsonToList<T>(string json) where T : class
 {
 JsonSerializer serializer = new JsonSerializer();
 StringReader sr = new StringReader(json);
 object obj = serializer.Deserialize(new JsonTextReader(sr), typeof(List<T>));
 List<T> list = obj as List<T>;
 return list;
 }
 /// <summary>
 /// 将JSON转数组
 /// 用法:jsonArr["xxxx"]
 /// </summary>
 /// <param name="json">json字符串</param>
 /// <returns></returns>
 public static JArray GetToJsonList(string json)
 {
 JArray jsonArr = (JArray)JsonConvert.DeserializeObject(json);
 return jsonArr;
 }
 /// <summary>
 /// 将DataTable转换成实体类
 /// </summary>
 /// <typeparam name="T">实体类</typeparam>
 /// <param name="dt">DataTable</param>
 /// <returns></returns>
 public static List<T> DtConvertToModel<T>(DataTable dt) where T : new()
 {
 List<T> ts = new List<T>();
 foreach (DataRow dr in dt.Rows)
 {
 T t = new T();
 foreach (PropertyInfo pi in t.GetType().GetProperties())
 {
 if (dt.Columns.Contains(pi.Name))
 {
 if (!pi.CanWrite) continue;
 var value = dr;
 if (value != DBNull.Value)
 {
 switch (pi.PropertyType.FullName)
 {
 case "System.Decimal":
 pi.SetValue(t, decimal.Parse(value.ToString()), null);
 break;
 case "System.String":
 pi.SetValue(t, value.ToString(), null);
 break;
 case "System.Int32":
 pi.SetValue(t, int.Parse(value.ToString()), null);
 break;
 default:
 pi.SetValue(t, value, null);
 break;
 }
 }
 }
 }
 ts.Add(t);
 }
 return ts;
 }
 }
 }</pre>
</div>

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<div id="MySignature" role="contentinfo">
<div>作者：陈彦斌</div>
<div>出处：https://www.cnblogs.com/chenyanbin/
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来源：https://www.cnblogs.com/chenyanbin/p/11200415.html

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C#解析JSON数组