Asp.net实现无刷新调用后台实体类数据并以Json格式返回

public class Temp{  public int Index { get; set; }  public string Description { get; set; }  public string ImagePath { get; set; }  public DateTime MyDate { get; set; }}//数据源  List<Temp> listTemp = new List<Temp>() {   new Temp(){ Index=1,ImagePath="Desert.jpg", Description="图片1",MyDate=DateTime.Now},   new Temp(){Index=2,ImagePath="Chrysanthemum.jpg", Description="图片2",MyDate=DateTime.Now},   new Temp(){Index=3,ImagePath="Penguins.jpg", Description="图片3",MyDate=DateTime.Now},   new Temp(){Index=4,ImagePath="Jellyfish.jpg", Description="图片4",MyDate=DateTime.Now},   new Temp(){Index=5,ImagePath="Tulips.jpg", Description="图片5",MyDate=DateTime.Now} };  public void ProcessRequest(HttpContext context) {   string index = context.Request["Index"];   string jsonStr = string.Empty;   foreach (var item in listTemp)   {     if (item.Index.ToString() == index)     {       JavaScriptSerializer serializer = new JavaScriptSerializer();       jsonStr = serializer.Serialize(item); //序列化为json格式       break;     }   }    context.Response.Write(jsonStr); }

$.getJSON("imageChange.ashx", { Index: i - 1 }, function (result) {  $("#<%=lblDescription.ClientID %>").text(result.Description);$("#<%=Image1.ClientID %>").attr("src", path + result.ImagePath.substr(result.ImagePath.lastIndexOf('/') + 1));   var d = eval("new " + result.MyDate.replace(////g, ""));          $("#<%=lblDate.ClientID %>").text(Todate(d.ToLocalTime().toString()));});