440petSaleWeb/Web/admin/login.aspx.cs

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using System;
using System.Collections.Generic;
using System.Data;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class _login : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            litIP.Text = Request.UserHostAddress;
        }
    }


    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        PSD.BLL.admin bll = new PSD.BLL.admin();
        DataSet ds =bll.GetList(" lname='" + this.username.Value + "' and pwd='" + this.password.Value + "'");

        //判断用户是否存在
        if (ds.Tables[0].Rows.Count > 0)
        {
            DataRow dr = ds.Tables[0].Rows[0];

            //把用户信息存入到Session
            Session["id"] = dr["aid"].ToString();
            Session["username"] = dr["lname"].ToString();
            Session["userrole"] =dr["flag"].ToString()=="1"?"超级管理员": "管理员";

            //跳转到后台
            Response.Redirect("Default.aspx");
        }
        else
        {
            MessageBox.Show(this, "用户名或密码错误，请重试!");
            return;
        }
    }
}