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;
11using OnLineExam.BusinessLogicLayer;
12
13public partial class Web_Login : System.Web.UI.Page
14...{
15    protected void Page_Load(object sender, EventArgs e)
16    ...{
17        if (!IsPostBack)
18        ...{                   
19            if (!Object.Equals(Request.Cookies["UserID"], null))
20            ...{
21                HttpCookie readcookie = Request.Cookies["UserID"];
22                this.txtUserID.Text = readcookie.Value;
23            }
24        }
25       
26    }
27    //登录按钮事件
28    protected void imgBtnLogin_Click(object sender, ImageClickEventArgs e)
29    ...{
30        Users user = new Users();//创建Users对象user
31        string pwdMd5 = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(txtPwd.Text.Trim(), "MD5").ToString();
32        if (String.Compare(Request.Cookies["yzmcode"].Value, Validator.Text, true) != 0)
33        ...{
34            lblMessage.Text = "验证码错误！";
35        }
36        else
37        ...{
38            if (user.CheckPassword(txtUserID.Text.Trim()))//根据用户编号查询用户密码
39            ...{
40                if (user.UserPwd == pwdMd5)//输入密码与用户密码相同
41                ...{
42                    if (object.Equals(Request.Cookies["UserID"], null))
43                    ...{
44                        CreateCookie();
45                    }
46                    else
47                    ...{
48                        CreateCookie();
49                    }  
50                     Session["userID"] = txtUserID.Text.Trim();//存储用户编号
51                     Response.Redirect("Default.aspx");//转向管理员操作界面                      
52                }
53                else//密码错误，给出提示
54                ...{
55                    lblMessage.Text = "您输入的密码错误！";
56                }
57            }
58            else//用户不存在，给出提示
59            ...{
60                lblMessage.Text = "该用户不存在！";
61            }
62        }
63    }
64    protected void ChangeCode_Click(object sender, EventArgs e)
65    ...{
66
67    }
68    private void CreateCookie()
69    ...{
70        HttpCookie cookie = new HttpCookie("UserID");
71        if (this.cbxRemeberUser.Checked)
72        ...{
73            cookie.Value = this.txtUserID.Text;
74        }
75        cookie.Expires = DateTime.MaxValue;
76        Response.AppendCookie(cookie);
77    } 
78
79}
80
81