当前文件： MultiuserGuestBook/login.aspx.cs[1K，2009-6-12 11:47:56]，打开代码结构图

		            
 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 login : System.Web.UI.Page
13...{
14    public string userid;
15    public string exit;
16    public string pwd;
17    public HttpCookie logincookie = new HttpCookie("userid");
18    
19    protected void Page_Load(object sender, EventArgs e)
20    ...{
21        if (!IsPostBack)
22        ...{
23            userid = Request.QueryString["userid"];
24            exit = Request.QueryString["exit"];
25            txtuserid.Text = userid;
26            if (exit == "ok")
27            ...{//如果为退出命令，则执行
28                Panel1.Visible = false;
29                Panel2.Visible = true;
30                logincookie.Value = null;
31                Response.Cookies.Add(logincookie);
32            }
33            else
34            ...{
35                Panel2.Visible = false;
36                Panel1.Visible = true;
37            }
38        }
39    }
40    protected void btnload_Click(object sender, EventArgs e)
41    ...{
42        userid = txtuserid.Text;
43        pwd = txtpwd.Text;
44        if (db.img("select * from users where userid='" + userid + "' and pwd='" + pwd + "'"))
45        ...{
46            logincookie.Value = userid;
47            Response.Cookies.Add(logincookie);
48            Response.Redirect("index.aspx?userid=" + userid);
49        }
50        else
51        ...{
52            lblerr.Text = "用户名或密码错误！";
53        }
54    }
55}
56