json串的使用

一：在C#中使用json字符串

从这里下载:http://www.newtonsoft.com/products/json/

安装:

1.解压下载文件,得到Newtonsoft.Json.dll
2.在项目中添加引用..
序列化和反序列在.net项目中:

Product product = new Product();

product.Name = "Apple";
product.Expiry = new DateTime(, , );
product.Price = 3.99M;
product.Sizes = new string[] { "Small", "Medium", "Large" };

string output = JavaScriptConvert.SerializeObject(product);
//{
//  "Name": "Apple",
//  "Expiry": new Date(1230422400000),
//  "Price": 3.99,
//  "Sizes": [
//    "Small",
//    "Medium",
//    "Large"
//  ]
//}

Product deserializedProduct = (Product)JavaScriptConvert.DeserializeObject(output, typeof(Product));

读取JSON

string jsonText = "['JSON!',1,true,{property:'value'}]";

JsonReader reader = new JsonReader(new StringReader(jsonText));

Console.WriteLine("TokenType\t\tValueType\t\tValue");

while (reader.Read())
{
    Console.WriteLine(reader.TokenType + "\t\t" + WriteValue(reader.ValueType) + "\t\t" + WriteValue(reader.Value))
}

结果显示:

TokenType	ValueType	Value
StartArray	null	null
String	System.String	JSON!
Integer	System.Int32	1
Boolean	System.Boolean	True
StartObject	null	null
PropertyName	System.String	property
String	System.String	value
EndObject	null	null
EndArray	null	null

JSON写入

StringWriter sw = new StringWriter();
JsonWriter writer = new JsonWriter(sw);

writer.WriteStartArray();
writer.WriteValue("JSON!");
writer.WriteValue();
writer.WriteValue(true);
writer.WriteStartObject();
writer.WritePropertyName("property");
writer.WriteValue("value");
writer.WriteEndObject();
writer.WriteEndArray();

writer.Flush();

string jsonText = sw.GetStringBuilder().ToString();

Console.WriteLine(jsonText);
// ['JSON!',1,true,{property:'value'}]

这里会打印出: ['JSON!',1,true,{property:'value'}].

完整例子

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

//需要引用 Newtonsoft.Json.dll
using Newtonsoft.Json;

namespace JsonTest
{
    class Program
    {
        /// <summary>
        /// 人员类
        /// </summary>
        public class Person
        {
            public string name; //姓名
            public int age; //年龄
            public bool sex_is_male; //性别

            public struct Partner //伙伴
            {
                public string partner_name; //伙伴姓名
                public int partner_age; //伙伴年龄
                public bool partner_sex_is_male; //伙伴性别
            }
            public Partner partner;

            public string[] achievement; //成就
        }

        static void Main(string[] args)
        {
            //设置一个Person类
            Person p = new Person();
            p.name = "Tsybius";
            p.age = ;
            p.sex_is_male = true;
            p.partner.partner_name = "Galatea";
            p.partner.partner_age = ;
            p.partner.partner_sex_is_male = false;
            p.achievement = new string[] { "ach1", "ach2", "ach3" };

            //直接输出
            Console.WriteLine("Formatting.None:");
            string json1 = JsonConvert.SerializeObject(p);
            Console.WriteLine(json1 + "\n");

            //缩进输出
            Console.WriteLine("Formatting.Indented:");
            string json2 = JsonConvert.SerializeObject(p, Formatting.Indented);
            Console.WriteLine(json2 + "\n");

            Console.ReadLine();
        }
    }
}

二：格式

格式：

{"tools": [
    { "name":"css format" , "site":"http://www.cnblogs.com/hongmaju/" },
    { "name":"json format" , "site":"http://www.cnblogs.com/hongmaju/" },
    { "name":"hash MD5" , "site":"http://www.cnblogs.com/hongmaju/" }
    ]
}

有层次的格式：

{
    "": [
        {
            "Txt": "['收银员']",
            "Names": "['bi']",
            "data": [
                {
                    "ID": "",
                    "Name": "收银员"
                },
                {
                    "ID": "",
                    "Name": "张三"
                }
            ]
        }
    ],
    "": [
        {
            "Txt": "['餐台类型']",
            "Names": "['ro']",
            "data": [
                {
                    "ID": "",
                    "Name": "A1"
                },
                {
                    "ID": "",
                    "Name": "包桌"
                }
            ]
        }
    ],
    "": [
        {
            "Txt": "['账单类型']",
            "Names": "['bi']",
            "data": [
                {
                    "ID": "G",
                    "Name": "挂账账单"
                },
                {
                    "ID": "gzhk",
                    "Name": "挂账回款"
                },
                {
                    "ID": "H",
                    "Name": "会员充值"
                },
                {
                    "ID": "l",
                    "Name": "连锁账单"
                },
                {
                    "ID": "M",
                    "Name": "招待账单"
                },
                {
                    "ID": "R",
                    "Name": "红冲账单"
                },
                {
                    "ID": "Z",
                    "Name": "异地卡充值"
                },
                {
                    "ID": "J",
                    "Name": "预订押金"
                },
                {
                    "ID": "Z",
                    "Name": "已结账单"
                }
            ]
        }
    ],
    "": [
        {
            "Txt": "['营业站点']",
            "Names": "['se']",
            "data": [
                {
                    "ID": "",
                    "Name": "重庆万州面馆"
                }
            ]
        }
    ]
}

在线验证json格式的地址：http://www.atool.org/jsonformat.php

三：常用的使用方法

对上面的json的处理：

success: function (result) {
　　for (var key in result) {
　　　　alert(key);//弹出0，1,2,3这几个数字
　     alert(result[key]);//弹出0对应的json串
　　   alert(getValue(result[key][0].Txt));//得到0对应的json串中的Txt的值
　　　　for (var da in result[key]) {
　　　　alert(result[key][da].data);//得到0对应的json串中的data的json串
　　　　}
　　}
}