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; }

}