Newtonsoft.Json 复杂结构类型的取值

由于项目中需要取网页上的数据,但是数据时JSON格式的,于是听同事介绍了一个Newtonsoft.Json.dll文件

具体操作如下:

我的字符串类型为:

string  str = "{ 'root':{ 'items': [{'Warehouse': '219410', 'City_St': 'Morrow, GA', 'Bales': '264'},{'Warehouse': '240124', 'City_St': 'Climax, GA', 'Bales': '88'},{'Warehouse': '266405', 'City_St': 'Funston, GA', 'Bales': '176'},{'Warehouse': '297005', 'City_St': 'Meigs, GA', 'Bales': '264'},{'Warehouse': '710527', 'City_St': 'Greenville, SC', 'Bales': '440'}] }} " ;

 需要循环取出Warehouse的值,这里我们使用了类构造函数

 先定义所需要的类类型

public  class  MyList
  {
      public  string  Warehouse { get ; set ; }
      public  string  City_St { get ; set ; }
  }
  public  class  Items
  {
      public  IList items { get ; set ; }
  }
  public  class  Root
  {
      public  Items root { get ; set ; }
  }

 然后就可以使用DecodeObject对象转换了

复制代码
        string str = "{ 'root':{ 'items': [{'Warehouse': '219410', 'City_St': 'Morrow, GA', 'Bales': '264'},{'Warehouse': '240124', 'City_St': 'Climax, GA', 'Bales': '88'},{'Warehouse': '266405', 'City_St': 'Funston, GA', 'Bales': '176'},{'Warehouse': '297005', 'City_St': 'Meigs, GA', 'Bales': '264'},{'Warehouse': '710527', 'City_St': 'Greenville, SC', 'Bales': '440'}] }} ";
        Root T = Utility.JsonUtility.DecodeObject(str);
        for (int i = 0; i < T.root.items.Count; i++)
        {
            Response.Write(T.root.items[i].Warehouse+"\n");
        }
复制代码

输出结果如下图

完整代码如下:

复制代码
 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Web;
 5 using System.Web.UI;
 6 using System.Web.UI.WebControls;
 7 using Newtonsoft.Json;
 8 using Newtonsoft.Json.Converters;
 9 using System.IO;
10 
11 public partial class _Default : System.Web.UI.Page
12 {
13     protected void Page_Load(object sender, EventArgs e)
14     {
15         string str = "{ 'root':{ 'items': [{'Warehouse': '219410', 'City_St': 'Morrow, GA', 'Bales': '264'},{'Warehouse': '240124', 'City_St': 'Climax, GA', 'Bales': '88'},{'Warehouse': '266405', 'City_St': 'Funston, GA', 'Bales': '176'},{'Warehouse': '297005', 'City_St': 'Meigs, GA', 'Bales': '264'},{'Warehouse': '710527', 'City_St': 'Greenville, SC', 'Bales': '440'}] }} ";
16         Root T = Utility.JsonUtility.DecodeObject(str);
17         for (int i = 0; i < T.root.items.Count; i++)
18         {
19             Response.Write(T.root.items[i].Warehouse+"\n");
20         }
21     }
22 
23     public class MyList
24     {
25         public string Warehouse { get; set; }
26         public string City_St { get; set; }
27     }
28     public class Items
29     {
30         public IList items { get; set; }
31     }
32     public class Root
33     {
34         public Items root { get; set; }
35     }
36 
37     private static string StringFormat(string str, Type type)
38     {
39         if (type == typeof(string))
40         {
41             str = String2Json(str);
42             str = "\"" + str + "\"";
43         }
44         else if (type == typeof(DateTime))
45         {
46             str = "\"" + str + "\"";
47         }
48         else if (type == typeof(bool))
49         {
50             str = str.ToLower();
51         }
52         return str;
53     } 
54 
55 }
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注:项目中的Newtonsoft是有3个版本的.NET2.0 、3.5、 4.0 要引用对应的版本才能找到名称空间;

Utility.cs完整代码如下:

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using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Text;
using  Newtonsoft.Json.Converters;
using  Newtonsoft.Json;
using  System.IO;
 
///
///JsonUtility 的摘要说明
///
public  class  Utility
{
     ///
     /// Json工具类
     ///
     public  static  class  JsonUtility
     {
         ///
         /// 添加时间转换器
         ///
         ///
         private  static  void  AddIsoDateTimeConverter(JsonSerializer serializer)
         {
             IsoDateTimeConverter idtc = new  IsoDateTimeConverter();
             //定义时间转化格式
             idtc.DateTimeFormat = "yyyy-MM-dd HH:mm:ss" ;
             //idtc.DateTimeFormat = "yyyy-MM-dd";
             serializer.Converters.Add(idtc);
         }
 
         ///
         /// Json转换配置
         ///
         ///
         private  static  void  SerializerSetting(JsonSerializer serializer)
         {
             serializer.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;
             //serializer.NullValueHandling = NullValueHandling.Ignore;
             //serializer.MissingMemberHandling = MissingMemberHandling.Ignore;
             //serializer.DefaultValueHandling = DefaultValueHandling.Ignore;
         }
 
         ///
         /// 返回结果消息编码
         ///
         ///
         ///
         ///
         ///
         ///
         ///
         public  static  string  ReturnMessage( bool  sucess, int  total, string  message, string  exMessage, string  data)
         {
             message = message.Replace( "'" , "" ).Replace( "\"" , "" ).Replace( "<" , "" ).Replace( ">" , "" );
             exMessage = exMessage.Replace( "'" , "" ).Replace( "\"" , "" ).Replace( "<" , "" ).Replace( ">" , "" );
 
             return  string .Format( "{{success:{0},total:{1},data:{2},message:\"{3}\",exMessage:\"{4}\"}}" ,
                 sucess.ToString().ToLower(), total, data, message, exMessage);
         }
 
         ///
         /// 返回失败信息
         ///
         ///
         ///
         ///
         ///
         public  static  string  ReturnFailureMessage( string  message, string  exMessage)
         {
             return  ReturnMessage( false , 0, message, exMessage, "[]" );
         }
 
         ///
         /// 返回失败信息
         ///
         ///
         ///
         ///
         ///
         public  static  string  ReturnFailureMessageTouch( string  message, string  exMessage)
         {
             return  "{\"success\":\"false\",\"msg\":\""  + exMessage + "\"}" ;
         }
 
         ///
         /// 返回成功信息
         ///
         ///
         ///
         ///
         ///
         ///
         ///
         public  static  string  ReturnSuccessMessage( int  total, string  message, string  exMessage, List objList)
         {
             string  data = ListToJson(objList);
             return  ReturnMessage( true , total, message, exMessage, data);
         }
 
         public  static  string  ReturnSuccessMessageTouch(T obj)
         {
             string  data = ObjectToJson(obj);
             return  data;
         }
 
         ///
         /// 返回成功信息
         ///
         ///
         ///
         ///
         ///
         ///
         ///
         public  static  string  ReturnSuccessMessage( string  message, string  exMessage)
         {
             return  ReturnMessage( true , 0, message, exMessage, "[]" );
         }
 
         ///
         /// 返回成功信息
         ///
         ///
         ///
         ///
         ///
         ///
         ///
         public  static  string  ReturnSuccessMessageTouch( string  message, string  exMessage)
         {
             return  "{\"success\":\"true\",\"msg\":\""  + message + "\"}" ;
         }
 
 
 
         ///
         /// 返回成功信息
         ///
         ///
         ///
         /// JSON 对象
         ///
         public  static  string  ReturnSuccessMessage( string  message, string  exMessage, string  data)
         {
             return  ReturnMessage( true , 0, message, exMessage, "["  + data + "]" );
         }
 
         ///
         /// 返回成功消息
         ///
         ///
         ///
         ///
         ///
         ///
         ///
         public  static  string  ReturnSuccessMessage( int  total, string  message, string  exMessage, T obj)
         {
             string  data = ObjectToJson(obj);
             return  ReturnMessage( true , total, message, exMessage, data);
         }
 
         ///
         /// 把对象列表编码为Json数据
         ///
         ///
         ///
         ///
         public  static  string  ListToJson(List objList)
         {
             JsonSerializer serializer = new  JsonSerializer();
             SerializerSetting(serializer);
             AddIsoDateTimeConverter(serializer);
 
             using  (TextWriter sw = new  StringWriter())
             using  (JsonWriter writer = new  JsonTextWriter(sw))
             {
                 serializer.Serialize(writer, objList);
                 return  sw.ToString();
             }
         }
 
         ///
         ///  把一个对象编码为Json数据
         ///
         ///
         ///
         ///
         public  static  string  ObjectToJson(T obj)
         {
             JsonSerializer serializer = new  JsonSerializer();
             SerializerSetting(serializer);
             AddIsoDateTimeConverter(serializer);
 
             using  (TextWriter sw = new  StringWriter())
             using  (JsonWriter writer = new  JsonTextWriter(sw))
             {
                 serializer.Serialize(writer, obj);
                 return  sw.ToString();
             }
         }
 
 
         ///
         /// 根据传入的Json数据,解码为对象(一个)
         ///
         ///
         ///
         ///
         public  static  T DecodeObject( string  data)
         {
             JsonSerializer serializer = new  JsonSerializer();
             serializer.MissingMemberHandling = MissingMemberHandling.Ignore;
             AddIsoDateTimeConverter(serializer);
             StringReader sr = new  StringReader(data);
             return  (T)serializer.Deserialize(sr, typeof (T));
 
 
         }
 
         ///
         /// 功能同DecodeObject
         ///
         ///
         ///
         ///
         public  static  List DecodeObjectList( string  data)
         {
             JsonSerializer serializer = new  JsonSerializer();
             serializer.MissingMemberHandling = MissingMemberHandling.Ignore;
             AddIsoDateTimeConverter(serializer);
             StringReader sr = new  StringReader(data);
             return  (List)serializer.Deserialize(sr, typeof (List));
         }
 
         public  static  string  EncodeAjaxResponseJson( string  jsonString, string  callback)
         {
             String responseString = "" ;
             //判断是否jsonp调用
             if  (!String.IsNullOrEmpty(callback))
             {
                 //jsonp调用,需要封装回调函数,并返回
                 responseString = callback + "("  + jsonString + ")" ;
             }
             else
             {
                 //普通ajax调用,直接返回Json数据
                 responseString = jsonString;
             }
 
             return  responseString;
         }
 
         public  static  string  ExtGridSortInfo( string  property, string  direction)
         {
             return  string .Format( "[{{\"property\":\"{0}\",\"direction\":\"{1}\"}}]" , property, direction);
         }
     }
}

 

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