初用ajax框架出现本已更新数据了的页再调用时仍是原数据

小弟初用ajax框架
一个页面中用了updatepanel
updatepannel里是一个绑定了数据源的listbox和对此绑定的项的增删改操作按钮
但明明增加了数据或删除了数据，跳转到其它页面后再跳转回来时发现数据仍是未更改前的数据
自己设个断点调试了一下发现在跳回调用这个页面时，页面就没有更新了，
好像是在本地缓存了。。
请各位指教一下

解决方案 »

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贴代码出来看看给url加时间戳再试试。
主要是跳回到这个页面时是通过一个flash的按钮跳转的。url上加参数不太可能了。
然后我在page_load里写事件，然后设了断点，但跳到这个页面时，根本没有运行page_load代码
也就是这个请求没有回发，而是调用了本地的缓存
页面代码如下
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="companystand.aspx.cs" Inherits="companystand" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>××××</title>
<style type="text/css">

</style>
</head>
<body>
    <form id="form1" runat="server">
    <div id="Layer1">
<script language=javascript>
var flashURL="head.swf";
var flashWIDTH="570";
var flashHEIGHT="25";
</script> <script language=javascript src="include/flashframe.js"></script>
</div>
<div id="Layer4" style="left: 146px; width: 815px; top: 49px; height: 299px">
    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:taxiConnectionString %>"
        SelectCommand="SELECT * FROM [es]"></asp:SqlDataSource>
    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <ContentTemplate>
    <table style="width: 572px; height: 244px; border-right: silver thin inset; border-top: silver thin inset; border-left: silver thin inset; border-bottom: silver thin inset;">
        <tr>
            <td colspan="2" style="height: 13px" background="images/chanpin.gif">
                 </td>
        </tr>
        <tr>
            <td colspan="1" rowspan="4" valign="top">
                <asp:ListBox ID="ListBox1" runat="server" DataSourceID="SqlDataSource1" DataTextField="es_title"
                    DataValueField="es_id" Height="195px" Width="346px" AutoPostBack="True" OnSelectedIndexChanged="ListBox1_SelectedIndexChanged" ></asp:ListBox></td>
            <td rowspan="2" style="height: 90px; width: 205px;">
                <asp:TextBox ID="TextBox1" runat="server" Height="112px" TextMode="MultiLine" Width="191px"></asp:TextBox></td>
        </tr>
        <tr>
        </tr>
        <tr>
            <td style="font-size: 9pt; width: 205px; color: #004e98; height: 3px">
                分值<asp:TextBox ID="TextBox2" runat="server" Width="102px"></asp:TextBox></td>
        </tr>
        <tr>
            <td style="height: 35px; width: 205px;">
                <asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/images/add.gif" OnClick="ImageButton1_Click" />
                 
                <asp:ImageButton ID="ImageButton2" runat="server" ImageUrl="~/images/del.gif" OnClick="ImageButton2_Click" />
                 
                <asp:ImageButton ID="ImageButton3" runat="server" ImageUrl="~/images/edit.gif" OnClick="ImageButton3_Click" /></td>
        </tr>
        <tr>
            <td style="height: 15px" colspan="2" background="images/chanpin.gif">
            </td>
        </tr>
    </table>
        </ContentTemplate>
    </asp:UpdatePanel>
</div>
<div id="Layer5" style="left: 0px; top: 45px; width: 142px; height: 70px;">
  <script language=javascript>
var flashURL="stand.swf";
var flashWIDTH="140";
var flashHEIGHT="60";
</script> <script language=javascript src="include/flashframe.js"></script></div>
    </form>
</body>
</html>
C#代码如下
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;public partial class companystand : System.Web.UI.Page
{


    SqlConnection userConnection = DB.GetConnetcion();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            this.ListBox1.DataBind();
        }
        this.Label2.Text = Session["loginname"].ToString();
    }
    protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        this.TextBox1.Text = this.ListBox1.SelectedItem.Text;
       //取出分值
        SqlCommand userCommand = new SqlCommand("select es_point from es where es_id= '" + this.ListBox1.SelectedItem.Value.ToString() + "'", userConnection);
        userCommand.Connection.Open();//打开连接
        this.TextBox2.Text = userCommand.ExecuteScalar().ToString();
        userCommand.Connection.Close();//关闭连接
    }    //新增
    protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
    {
        SqlCommand userCommand = new SqlCommand("exec insert_es_1 '"+this.TextBox1.Text+"','"+this.TextBox2.Text+"'", userConnection);
        userCommand.Connection.Open();//打开连接
        userCommand.ExecuteNonQuery();
        userCommand.Connection.Close();//关闭连接
        this.ListBox1.DataBind();
    }
    //删除
    protected void ImageButton2_Click(object sender, ImageClickEventArgs e)
    {
        SqlCommand userCommand = new SqlCommand("exec delete_es_1 '"+this.ListBox1.SelectedItem.Value.ToString()+"'", userConnection);
        userCommand.Connection.Open();//打开连接
        userCommand.ExecuteNonQuery();
        userCommand.Connection.Close();//关闭连接
        this.ListBox1.DataBind();
    }
    //更新
    protected void ImageButton3_Click(object sender, ImageClickEventArgs e)
    {
        SqlCommand userCommand = new SqlCommand("exec update_es_1 '"+this.ListBox1.SelectedItem.Value.ToString()+"','"+this.TextBox1.Text+"','"+this.TextBox2.Text+"'", userConnection);
        userCommand.Connection.Open();//打开连接
        userCommand.ExecuteNonQuery();
        userCommand.Connection.Close();//关闭连接
        this.ListBox1.DataBind();
    }
}
刚刚在csdn上找到了方法。就是清理缓存方法
<%@   OutputCache   Duration= "1 "   VaryByParam= "none "   % >
嗯。用这个方法解决了问题。不知道各位还有没有什么好的建议
比如如果没有更改过这个页面就用原来缓存的以提高响应速度。
如果发生了更改就同步刷新页面？