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 user_modify_0 : System.Web.UI.Page
13...{
14    protected void Page_Load(object sender, EventArgs e)
15    ...{
16        if (Session["user"] == "yes")
17        ...{
18            Response.Redirect("user_modify_1.aspx");
19
20        }
21     
22    }
23    protected void Button1_Click(object sender, EventArgs e)
24    ...{
25          if (GridView1.Rows.Count > 0)
26        ...{
27              Session["user_email"] = ""+ tb_email.Text+ "" ;
28              Session["user"] = "yes";
29              Response.Redirect("user_modify_1.aspx");
30
31        }
32        else
33        ...{
34              Response.Redirect("user_error.aspx");
35          }
36    }
37}
38