login.aspx.cs

本程序基于 asp.net 2.0 +sql server 2

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 lalablog;
public partial class login : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if(!IsPostBack )
        getUsernameFromDb();
    }
    private void getUsernameFromDb()
    {
        string sql = "select top 1 username from users where loginip='" + Request.UserHostAddress + "' order by logindate desc";
        openDb o1 = new openDb(sql);
        string result = o1.getValue();
        if (result != "-1")
        {
            tb_username.Text = result;
            tb_password.Focus();
        }
        else
            tb_username.Focus();
    }

    protected void btnLogin_Click(object sender, EventArgs e)
    {
        string username = Server.HtmlEncode(tb_username.Text.ToString());
        string password = Server.HtmlEncode(tb_password.Text.ToString());

        if (username.Length > 0 && password.Length > 0)
        {
            password = FormsAuthentication.HashPasswordForStoringInConfigFile(password, "SHA1");
            string loginip = Request.UserHostAddress;
            bloguser user1 = new bloguser(username, password, loginip);

            string x = user1.login();

            /*如果返回信息是success，可以正常登陆*/
            if (x == "success")
            {
                Session["userid"] = user1.getuserid();
                Session["username"] =user1.getNickName();
               Response.Write("<script type=text/javascript>");
               Response.Write("window.opener.location.href=window.opener.location.href;");
               Response.Write("window.close();");
                Response.Write("</script>");

            }
            else
            {
                myfunc m1 = new myfunc(x);
                Response.Write(m1.JavaMsg());
            }
        }
            /*用户名或者密码的长度小于1*/
        else 
        {
            myfunc m1 = new myfunc("用户名还是密码忘输了吧");
            Response.Write(m1.JavaMsg());
        }
    }

    protected void btn_forget_pass_Click(object sender, EventArgs e)
    {
        Response.Write("<script type=text/javascript>");
        Response.Write("window.opener.location.href='userfindpass.aspx';");
        Response.Write("window.close();");
        Response.Write("</script>");
    }
}