Newtonsoft.Json序列化和反序列

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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"];
                }
            //}
        }
    }
}
原文链接:https://www.f2er.com/json/290221.html

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