Newtonsoft.Json序列化和反序列

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(2008,12,28);

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(1);

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!',{property:'value'}]

这里会打印出: ['JSON!',{property:'value'}].

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Newtonsoft.Json;
using System.IO;
using Newtonsoft.Json.Linq;

namespace WebApplication15
{
    public partial class WebForm4 : System.Web.UI.Page
    {
        protected void Page_Load(object sender,EventArgs e)
        {
            var jsonBuilder = new System.Text.StringBuilder();
            using (var jsonWriter = new Newtonsoft.Json.JsonTextWriter(new System.IO.StringWriter(jsonBuilder)))
            {
                jsonWriter.WriteStartObject();
                jsonWriter.WritePropertyName("status");

                if (false)
                {
                    jsonWriter.WriteValue(false);
                    jsonWriter.WritePropertyName("msg");
                    jsonWriter.WriteValue("未知原因，请重试");
                }
                else
                {
                    jsonWriter.WriteValue(true);
                    jsonWriter.WritePropertyName("yftest");
                    jsonWriter.WriteStartArray();
                    for (int i = 0; i < 10; i++)
                    {
                        jsonWriter.WriteStartObject();
                        jsonWriter.WritePropertyName("id");
                        jsonWriter.WriteValue(i);
                        jsonWriter.WritePropertyName("name");
                        jsonWriter.WriteValue("test");
                        jsonWriter.WriteEndobject();
                    }

                    jsonWriter.WriteEndarray();
                }

                jsonWriter.WriteEndobject();
                jsonWriter.Flush();
            }

            Response.Write(jsonBuilder);

            //获取根status
          //var jsonObject = Newtonsoft.Json.Linq.JObject.Parse(jsonBuilder.ToString());

          //JToken agetoken = jsonObject["status"];
          //Response.Write(agetoken.ToString());

            //遍历深层参数
            var jsonObject = Newtonsoft.Json.Linq.JObject.Parse(jsonBuilder.ToString());
            var selectToken = jsonObject.SelectTokens("yftest",false);
            //if (selectToken != null && selectToken is Newtonsoft.Json.Linq.JArray)
            //{
                foreach (var item in selectToken.Children())
                {
                 JToken agetoken = item["id"];
                }
            //}
        }
    }
}

原文地址：https://www.jb51.cc/json/290221.html