总结登录方式

1

html 做登录页面 login.aspx 的 cs 做逻辑验证

<form action="login.aspx" method="get" name="baoge">
            <TABLE id="Table1" height="184" cellSpacing="3" cellPadding="10" width="473" align="center"

string username=Request.QueryString["username"].ToString();
            string userpwd=Request.QueryString["userpwd"].ToString();
            //先把密码加密
            string jm=System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(userpwd,"md5");
            //得到连接字符串
            string dbPath=System.Configuration.ConfigurationSettings.AppSettings["lyb"];
            //定义数据库连接字符串
            string ACconnStr="Provider=Microsoft.Jet.OleDb.4.0;Data Source="+Server.MapPath(dbPath);
            //创建数据库连接对象
            OleDbConnection ACconn=new OleDbConnection(ACconnStr);
            ACconn.Open();
            OleDbCommand cmd=new OleDbCommand("select count(*) from admin where username='"+username+"' and userpwd='"+jm+"'",ACconn);
            //又一种 登录 方法
            int count=Convert.ToInt32(cmd.ExecuteScalar());
            if(count>0)
            {
                Session["name"]=true;
                Response.Redirect("admin_index.aspx");
            }
            else
            {
                Response.Redirect("fail.htm");
            }
        }