视频教程：小型登陆系统（一）

登陆界面

v    登陆使用Membership的ValidateUser方法验证用户名与密码，根据用户所拥有的角色转到管理页面与个人页面，判断方法Roles.IsUserInRole(userName, “Admin”)，可以使用FormsAuthentication.SetAuthCookie(userName, false);方法把身份票证保存到Cookie集合，这里第二个参数使用的是false，关闭浏览器Cookie就失效。

 

 

Login.aspx

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Data.Common;

namespace RegeditOfAdoDotnet
{
    public partial class Login : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            //清除缓存
            Response.Buffer = true;
            Response.ExpiresAbsolute = System.DateTime.Now.AddSeconds(-1);
            Response.Expires = 0;
            Response.CacheControl = "no-cache";
            Response.AddHeader("Pragma", "No-Cache");
        }

        /// <summary>
        /// 登陆
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnLogin_Click(object sender, EventArgs e)
        {
            if (Page.IsValid)
            {
                try
                {
                    if (Membership.ValidateUser(txtUserName.Text, txtPassWord.Text))//验证提供的用户和密码是否有效的
                    {
                        if (Roles.IsUserInRole(txtUserName.Text, "Admin"))//判断当前登陆的用户是不是管理员
                        {
                            // 自己写的验证票--创建身份验证票
                            FormsAuthenticationTicket authTicket = new FormsAuthenticationTicket(1, txtUserName.Text, DateTime.Now, DateTime.Now.AddMinutes(20), false, "Admin");
                            // 创建身份验证票的加密字符串
                            string encryptedTicket = FormsAuthentication.Encrypt(authTicket);
                            // 将加密字符串存储在HttpCookie 对象中
                            HttpCookie authCookie = new HttpCookie(FormsAuthentication.FormsCookieName, encryptedTicket);
                            // 将此cookie 添加到返回给用户浏览器的cookie 集合中
                            Response.Cookies.Add(authCookie);
                            // 将用户重定向到最初请求的页
                            Response.Redirect("~/Admin/AdminInfo.aspx", true);
                        }
                        else
                        {
                            FormsAuthentication.RedirectFromLoginPage(txtUserName.Text, false);//将经过身份验证的用户重定向回最初请求的URL 或默认URL。
                            FormsAuthentication.SetAuthCookie(txtUserName.Text, false);//为提供的用户名创建一个身份验证票证，并将其添加到响应的Cookie 集合或URL。
                            Response.Redirect("~/Admin/GeneralUserInfo.aspx", true);
                        }
                    }
                    else
                    {
                        ClientScript.RegisterStartupScript(this.GetType(), "myscript", "<script>alert('登陆失败，请检查用户名和密码，重新输入！');</script>");
                    }
                }
                catch (Exception exp)
                {
                    //捕获异常
                    Response.Write(exp.Message); //输出错误信息
                }
            }
        }

        /// <summary>
        /// 退出
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnExit_Click(object sender, EventArgs e)
        {
            Session.Clear();
            FormsAuthentication.SignOut();
            Response.Redirect("~/Goodby.aspx");
        }
    }
}

登陆系统演示地址