JSON 数据转换

• JSON概述

     JSON（Java Script Object Notation）JS对象符号，通常JSON和XML是二选一的，JSON的数据格式很类似于JavaScript的对象

{
  "pets": {
    "name": "Jeffrey",
    "species": "Giraffe"
  }
}

• .NET原生方式进行数据转换

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

 

using System.Runtime.Serialization;

using System.ServiceModel;

using System.ServiceModel.Web;

 

    public class JsonHelper

    {

        public static string ToJson<T>(T obj)

        {

            string result = String .Empty;

            try

            {

                System.Runtime.Serialization.Json. DataContractJsonSerializer serializer =

                new System.Runtime.Serialization.Json.DataContractJsonSerializer( typeof(T));

                using (System.IO.MemoryStream ms = new System.IO. MemoryStream())

                {

                    serializer.WriteObject(ms, obj);

                    result = System.Text. Encoding.UTF8.GetString(ms.ToArray());

                }

            }

            catch (Exception ex)

            {

                throw ex;

            }

            return result;

        }

 

        public static string ToJsonFromByList<T>( List<T> vals)

        {

            System.Text. StringBuilder st = new System.Text.StringBuilder();

            try

            {

                System.Runtime.Serialization.Json. DataContractJsonSerializer s = new System.Runtime.Serialization.Json.DataContractJsonSerializer (typeof(T));

 

                foreach (T city in vals)

                {

                    using (System.IO.MemoryStream ms = new System.IO. MemoryStream())

                    {

                        s.WriteObject(ms, city);

                        st.Append(System.Text. Encoding.UTF8.GetString(ms.ToArray()));

                    }

                }

            }

            catch (Exception ex)

            {

                throw ex;

            }

 

            return st.ToString();

        }

 

        public static T ParseFormByJson<T>(string jsonStr)

        {

            T obj = Activator.CreateInstance<T>();

            using (System.IO.MemoryStream ms =

            new System.IO.MemoryStream (System.Text.Encoding.UTF8.GetBytes(jsonStr)))

            {

                System.Runtime.Serialization.Json. DataContractJsonSerializer serializer =

                new System.Runtime.Serialization.Json.DataContractJsonSerializer( typeof(T));

                return (T)serializer.ReadObject(ms);

            }

        }

    }  

• Newtonsoft.json组件方式进行数据转换

采用Newtonsoft.json组件方式实现json数据的转换需要引用Newtonsoft.json组件。

• • 下载地址

      http://download.csdn.net/detail/aaakingwin/5726429

• • 简易方式

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

 

using Newtonsoft.Json;

 

 

    public class JsonHelper

    {

        public static string ToJson<T>(T value)

        {

            return JsonConvert .SerializeObject(value,Formatting.None);

        }

 

        public static T FromJson<T>(string jsonText)

        {

            return JsonConvert .DeserializeObject<T>(jsonText); ;

        }

    }

• • 复杂可配置方式

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

 

using Newtonsoft.Json;

using System.IO;

 

   public static string ToJson<T>(T value)

        {

            Newtonsoft.Json. JsonSerializer json = new Newtonsoft.Json.JsonSerializer();

            json.NullValueHandling = NullValueHandling.Ignore;

            json.ObjectCreationHandling = Newtonsoft.Json. ObjectCreationHandling.Replace;

            json.MissingMemberHandling = Newtonsoft.Json. MissingMemberHandling.Ignore;

            json.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;

            StringWriter sw = new StringWriter();

            Newtonsoft.Json. JsonTextWriter writer = new JsonTextWriter(sw);

            writer.Formatting = Formatting.None;

            writer.QuoteChar = '"';

            json.Serialize(writer, value);

            string output = sw.ToString();

            writer.Close();

            sw.Close();

            return output;

        }

      

        public static T FromJson<T>(string jsonText)

        {

            Newtonsoft.Json. JsonSerializer json = new Newtonsoft.Json.JsonSerializer();

            json.NullValueHandling = Newtonsoft.Json. NullValueHandling.Ignore;

            json.ObjectCreationHandling = Newtonsoft.Json. ObjectCreationHandling.Replace;

            json.MissingMemberHandling = Newtonsoft.Json. MissingMemberHandling.Ignore;

            json.ReferenceLoopHandling = Newtonsoft.Json. ReferenceLoopHandling.Ignore;

            StringReader sr = new StringReader(jsonText);

            Newtonsoft.Json. JsonTextReader reader = new JsonTextReader(sr);

            T result = (T)json.Deserialize(reader, typeof(T));

            reader.Close();

            return result;

        }