Default.aspx.cs

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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;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            ltlLiuYanMess.Text = "";
            if (Request.Cookies["memberinfo"] != null)
            {
                truename.Text = Server.UrlDecode(Request.Cookies["memberinfo"]["Title"]);
                Button1.Enabled = true;
            }
            else
            {
                Button1.Enabled = false;
                ltlLiuYanMess.Text = "<font color='red'>请先登录</font>";
            }
        }
    }



    protected void btnLogin_Click(object sender, EventArgs e)
    {
        string username = txtLoginUserName.Text.Trim();
        string userpwd = txtLoginUserPwd.Text.Trim();

        DataTable dt = DB.getDataTable("select * from member where username='" + username + "' and userpwd='" + userpwd + "'");

        if (dt.Rows.Count > 0)
        {
            //写COOKIE
            HttpCookie cookie = new HttpCookie("memberinfo");
            cookie.Values["Title"] = HttpContext.Current.Server.UrlEncode(dt.Rows[0]["title"].ToString());
            cookie.Values["UserName"] = HttpContext.Current.Server.UrlEncode(dt.Rows[0]["UserName"].ToString());

            HttpContext.Current.Response.AppendCookie(cookie);

            Response.Redirect("default.aspx");
        }
        else
        {
            Common.ShowMessage(this.Page, "帐号或密码错误。", "");
            return;
        }
    }


    protected void Button1_Click(object sender, EventArgs e)