1using System;
 2using System.Data;
 3using System.Configuration;
 4using System.Collections;
 5using System.Web;
 6using System.Web.Security;
 7using System.Web.UI;
 8using System.Web.UI.WebControls;
 9using System.Web.UI.WebControls.WebParts;
10using System.Web.UI.HtmlControls;
11
12public partial class Cahce_Substitution : System.Web.UI.Page
13...{
14    protected void Page_Load(object sender, EventArgs e)
15    ...{
16
17    }
18
19    // 回调函数所调的静态方法
20    public static string GetTime(HttpContext context)
21    ...{
22        return DateTime.Now.ToString();
23    }
24}
25