Asp.Net MVC以 JSON传值扩展方法

Asp.Net在客户端和服务器端，以JSON形式相互传值，可写扩展方法,用到的类型如下：

DataContractJsonSerializer类：

该类在System.Runtime.Serialization.Json命名空间下，是将对象序列化为JavaScript对象表示法（Json），并将Json数据反序列化为对象。

以Asp.Net MVC为例：

扩展方法如下：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.IO;

using System.Runtime.Serialization.Json;

namespace System.Web.Mvc

{  

    public  static  class  MyFormCollention

    {

        /// <summary>

        /// 生成Json格式

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <param name="obj"></param>

        /// <returns></returns>

        public static string ToJsonStr<T>(T obj)

        {

DataContractJsonSerializerjson = new DataContractJsonSerializer(obj.GetType());

            using (MemoryStream stream = new MemoryStream())

            {

json.WriteObject(stream, obj);

                string szJson = System.Text.Encoding.UTF8.GetString(stream.ToArray());

                return szJson;

            }

        }

        /// <summary>

        /// 将JSON 字符转换为对象

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <param name="str"></param>

        /// <returns></returns>

        public static T ToJsonObject<T>(this string str)

        {

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

            using (MemoryStreamms = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(str)))

            {

DataContractJsonSerializerserializer = new DataContractJsonSerializer(obj.GetType());

                return (T)serializer.ReadObject(ms);

            }

        }

    }

}

网页客户端，View的Home文件夹（View视图）：

<script>

var Person={

        Name:"liu",

        Age:"20",

    }

functionReposeJson() {

        $.ajax({

type:"Get",

        url:"@Url.Action("SetJson","Home")?json="+JSON.stringify(Person),

dataType: "Json",

        success: function (data)

        {

            alert(data.Name);

            alert(data.Age);

        }

        })

    }

</script>

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控制器调用：

public class HomeController : Controller

    {

        [HttpGet]

        public string SetJson(string json)

        {

            Person boy = MyFormCollention.ToJsonObject<Person>(json);

            Person girl = new Person();

girl.Age = "19";

girl.Name = "wang";

json = MyFormCollention.ToJsonStr<Person>(girl);

            return json;

        }

     }

实体类：

public class Person {

        public string Name{set;get;}

        public string Age { set; get; }

    }