panel问题

请教一下大侠  做了个注册实验的
      就是我托了两个panel控件  第一个我设为true  第二个设为false  然后再后台写上这样的代码

protected void btntext3_Click(object sender, EventArgs e)
    {
        if (this.IsValid)
        {
            this.Panel3.Visible = false;
            this.Panel4.Visible =true;
        }
     当单击下一步时  第二个panel出来
  请各位师傅指点指点   谢谢！！！！！

解决方案 »

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this.IsValid
=>
Page.IsValid
楼上的大哥  还是出不来啊  我做了4个panel  前三个能出来   就是最后一个步能出来   请你在思考一下   我实在不能找出是什么地方错了
  this.Panel3.Visible = false;
点击按钮肯定要隐藏。在阐述一下你的问题4个panel想要什么效果。比如点击呈现几个隐藏几个。。
论坛签名======================================================================ganxiangdehaoma:你好!
截至 2011-04-05 16:27:55 前:
你已发帖 5 个, 未结贴 5 个;
结贴率为： 0.00%当您的问题得到解答后请及时结贴.
http://topic.csdn.net/u/20090501/15/7548d251-aec2-4975-a9bf-ca09a5551ba5.html
http://topic.csdn.net/u/20100428/09/BC9E0908-F250-42A6-8765-B50A82FE186A.html
http://topic.csdn.net/u/20100626/09/f35a4763-4b59-49c3-8061-d48fdbc29561.html如何给分和结贴？
http://community.csdn.net/Help/HelpCenter.htm#结帖如何给自己的回帖中也加上签名？
http://blog.csdn.net/q107770540/archive/2011/03/15/6250007.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="QuestionForCsdn.WebForm1" %><!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>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Panel ID="Panel1" runat="server">
            1
        </asp:Panel>
        <asp:Panel ID="Panel2" runat="server">
            2
        </asp:Panel>
        <asp:Panel ID="Panel3" runat="server">
            3
        </asp:Panel>
        <asp:Panel ID="Panel4" runat="server">
            4
        </asp:Panel>
        <asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
    </div>
    </form>
</body>
</html>
后台
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text.RegularExpressions;namespace QuestionForCsdn
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

            if (!IsPostBack)
            {
                this.Panel1.Visible = false;
                this.Panel2.Visible = false;
                this.Panel3.Visible = false;
                this.Panel4.Visible = false;
            }
        }        protected void Button1_Click(object sender, EventArgs e)
        {
            if (this.Panel1.Visible == false && this.Panel2.Visible == false && this.Panel3.Visible == false && this.Panel4.Visible == false)
            {
                this.Panel1.Visible = true;
                this.Panel2.Visible = false;
                this.Panel3.Visible = false;
                this.Panel4.Visible = false;
            }
            else if (this.Panel1.Visible == true && this.Panel2.Visible == false && this.Panel3.Visible == false && this.Panel4.Visible == false)
            {
                this.Panel1.Visible = false;
                this.Panel2.Visible = true;
                this.Panel3.Visible = false;
                this.Panel4.Visible = false;
            }
            else if (this.Panel1.Visible == false && this.Panel2.Visible == true && this.Panel3.Visible == false && this.Panel4.Visible == false)
            {
                this.Panel1.Visible = false;
                this.Panel2.Visible = false;
                this.Panel3.Visible = true;
                this.Panel4.Visible = false;
            }
            else if (this.Panel1.Visible == false && this.Panel2.Visible == false && this.Panel3.Visible == true && this.Panel4.Visible == false)
            {
                this.Panel1.Visible = false;
                this.Panel2.Visible = false;
                this.Panel3.Visible = false;
                this.Panel4.Visible = true;
            }
            else
            {
                this.Panel1.Visible = false;
                this.Panel2.Visible = false;
                this.Panel3.Visible = false;
                this.Panel4.Visible = false;
            }
        }
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
public partial class panaltest : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {    }
    protected void rbtntext_Click(object sender, EventArgs e)
    {
        if (rbtnagree.Checked)
        {
            this.Panel1.Visible = false;
            this.Panel2.Visible = true;
        }
    }
    protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
    {
        string textusername = args.Value;
        if (dbcon.judge(textusername))
        {
            //存在
            args.IsValid = false;        }
        else
        {
            args.IsValid = true;
        }    }
    protected void btnNext_Click(object sender, EventArgs e)
    {
        if (this.IsValid)
        {
            this.Panel2.Visible = false;
            this.Panel3.Visible = true;        }
    }
    protected void btnload_Click(object sender, EventArgs e)
    {
        this.FileUpload1.PostedFile.SaveAs(Server.MapPath("upfile") + "\\9.jpg");
        this.Image1.ImageUrl = Server.MapPath("upfile") + "\\9.jpg";
    }    protected void btntext3_Click(object sender, EventArgs e)
    {
        if (Page.IsValid)
        {
            this.Panel3.Visible = false;
            this.Panel4.Visible =true;
        }
    }    protected void Button1_Click(object sender, EventArgs e)
    {
        Response.Write("注册成功");
    }
}
随便请你解释一下这段代码：this.FileUpload1.PostedFile.SaveAs(Server.MapPath("upfile") + "\\9.jpg");
        this.Image1.ImageUrl = Server.MapPath("upfile") + "\\9.jpg";
尤其是 "\\9.jpg";
这个是我的代码  请你看哈  谢谢