 using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Runtime.Serialization.Json;
using System.ServiceModel.Web;///記得引用這個命名空間
using System.IO;
using System.Text;
/// <summary>
/// Summary description for JsonHelper
/// </summary>
public class JsonHelper
{
  public JsonHelper()
  {
    //
    // TODO: Add constructor logic here
    //
  }
  /// <summary>
  /// 把對象序列化 JSON 字符串 
  /// </summary>
  /// <typeparam name="T">對象類型</typeparam>
  /// <param name="obj">對象實體</param>
  /// <returns>JSON字符串</returns>
  public static string GetJson<T>(T obj)
  {
    //記住 添加引用 System.ServiceModel.Web 
    /**
     * 如果不添加上面的引用,System.Runtime.Serialization.Json; Json是出不來的哦
     * */
    DataContractJsonSerializer json = new DataContractJsonSerializer(typeof(T));
    using (MemoryStream ms = new MemoryStream())
    {
      json.WriteObject(ms, obj);
      string szJson = Encoding.UTF8.GetString(ms.ToArray());
      return szJson;
    }
  }
  /// <summary>
  /// 把JSON字符串還原為對象
  /// </summary>
  /// <typeparam name="T">對象類型</typeparam>
  /// <param name="szJson">JSON字符串</param>
  /// <returns>對象實體</returns>
  public static T ParseFormJson<T>(string szJson)
  {
    T obj = Activator.CreateInstance<T>();
    using (MemoryStream ms = new MemoryStream (Encoding.UTF8.GetBytes(szJson)))
    {
      DataContractJsonSerializer dcj = new DataContractJsonSerializer(typeof(T));
      return (T)dcj.ReadObject(ms);
    }
  }
}

測試實體類：

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

測試頁面：

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
  protected void Page_Load(object sender, EventArgs e)
  {
    string jsonStr = string.Empty;
    List<TestData> tds = new List<TestData>();
    //測試數(shù)據(jù)
    for (int i = 1; i < 4; i++)
    {
      tds.Add(new TestData() { Id = i, Name = "jinho" + i, Sex = "male" });
    }    //把一個list轉(zhuǎn)換為json字符串
    jsonStr = JsonHelper.GetJson<List<TestData>>(tds);
    Response.Write(jsonStr);
    this.Page.ClientScript.RegisterStartupScript(this.GetType(), "json", "getJson(" + jsonStr + ");", true);
  }
  
</script>
<script type="text/javascript">
  function getJson(jsonStr) {    //使用eval函數(shù)
    var json = eval(jsonStr);     //因為上面為list集合
    for (var i = 0; i < json.length; i++) {
      alert(json[i].Id + "Name:" + json[i].Name);
    }
  }
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
  <title></title>
</head>
<body>
  <form id="form1" runat="server">
  <div>
  
  </div>
  </form>
</body>
</html>

關(guān)于json字符串轉(zhuǎn)換為實體請各位自己測試吧！只要有上面那個JsonHelper 類，一切都好辦！

以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

您可能感興趣的文章: