1using System;
 2using System.Data;
 3using System.Configuration;
 4using System.Web;
 5using System.Web.Security;
 6using System.Web.UI;
 7using System.Web.UI.WebControls;
 8using System.Web.UI.WebControls.WebParts;
 9using System.Web.UI.HtmlControls;
10using System.Data.SqlClient;
11
12public partial class _Default : System.Web.UI.Page 
13...{
14    protected void Page_Load(object sender, EventArgs e)
15    ...{
16        
17    }
18    protected void btnLogin_Click(object sender, EventArgs e)
19    ...{
20        string sql = "select password from Login where UserName=@UserName";
21        if (Page.IsValid)
22        ...{
23            SqlDataReader reader = SqlHelp.getSqlDataReader(SqlHelp.con, CommandType.Text, sql, new SqlParameter("@UserName", this.txtUserName.Text.Trim()));
24            if (reader.Read())
25            ...{
26                if (this.txtPassword.Text.Trim().Equals(reader[0].ToString()))
27                ...{
28                    if (Session["code"].ToString().Equals(this.txtTestNum.Text.Trim()))
29                    ...{
30                        FormsAuthentication.RedirectFromLoginPage(txtUserName.Text.Trim(), false, null);
31                        Response.Redirect("index.aspx");
32                    }
33                    else
34                    ...{
35                        Session["error"] = "验证码不正确！";
36                        Response.Redirect("errorPage.aspx");
37                    }
38                }
39                else
40                ...{
41                    Session["error"] = "密码不正确！";
42                    Response.Redirect("errorPage.aspx");
43                }
44            }
45            else
46            ...{
47                Session["error"] = "用戶名不正确！";
48                Response.Redirect("errorPage.aspx");
49            }
50        }
51    }
52}
53