ASP.NET JSON文字列とエンティティークラスの変換例コード

 
  
using System; 
  
using System.Collections.Generic; 
  
using System.Linq; 
  
using System.Web; 
  
using System.Runtime.Serialization.Json; 
  
using System.ServiceModel.Web;///           
  
using System.IO; 
  
using System.Text; 
  
/// 
 
  
/// Summary description for JsonHelper 
  
/// 
 
  
public class JsonHelper 
  
{ 
  
    public JsonHelper() 
  
    { 
  
        // 
  
        // TODO: Add constructor logic here 
  
        // 
  
    } 
  
    /// 
 
  
    ///        JSON     
  
    /// 
 
  
    ///      
  
    ///      
  
    /// JSON    
  
    public static string GetJson(T obj) 
  
    { 
  
        //        System.ServiceModel.Web 
  
        /** 
  
         *           ,System.Runtime.Serialization.Json; Json       
  
         * */ 
  
        DataContractJsonSerializer json = new DataContractJsonSerializer(typeof(T)); 
  
        using (MemoryStream ms = new MemoryStream()) 
  
        { 
  
            json.WriteObject(ms, obj); 
  
            string szJson = Encoding.UTF8.GetString(ms.ToArray()); 
  
            return szJson; 
  
        } 
  
    } 
  
    /// 
 
  
    ///  JSON         
  
    /// 
 
  
    ///      
  
    /// JSON    
  
    ///      
  
    public static T ParseFormJson(string szJson) 
  
    { 
  
        T obj = Activator.CreateInstance(); 
  
        using (MemoryStream ms = new MemoryStream (Encoding.UTF8.GetBytes(szJson))) 
  
        { 
  
            DataContractJsonSerializer dcj = new DataContractJsonSerializer(typeof(T)); 
  
            return (T)dcj.ReadObject(ms); 
  
        } 
  
    } 
  
} 
  
 
 

 
  
public class TestData 
  
{ 
  
    public TestData() 
  
    { 
  
    } 
  
    public int Id { get; set; } 
  
    public string Name { get; set; } 
  
    public string Sex { get; set; } 
  
} 
  
 
 

 
  
 
  
 
   
  
<br>    protected void Page_Load(object sender, EventArgs e)<br>    {<br>        string jsonStr = string.Empty;<br>        List<TestData> tds = new List<TestData>();<br>        //    <br>        for (int i = 1; i < 4; i++)<br>        {<br>            tds.Add(new TestData() { Id = i, Name = "jinho" + i, Sex = "male" });<br>        }        //   list   json   <br>        jsonStr = JsonHelper.GetJson<List<TestData>>(tds);<br>        Response.Write(jsonStr);<br>        this.Page.ClientScript.RegisterStartupScript(this.GetType(), "json", "getJson(" + jsonStr + ");", true);<br>    }<br><br>
<br>    function getJson(jsonStr) {        //  eval  <br>        var json = eval(jsonStr);         //     list  <br>        for (var i = 0; i < json.length; i++) {<br>            alert(json[i].Id + "Name:" + json[i].Name);<br>        }<br>    }<br>