login.aspx.cs

用vs2005和sql2000实现的小型超市管理系统

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;
public partial class login : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        //绑定用户类型
        if (!this.IsPostBack)
        {
            //SqlConnection con = DB.createConnection();
            //con.Open();
            //SqlCommand cmd = new SqlCommand("Select * from userclass",con);
            //SqlDataReader sdr = cmd.ExecuteReader();
            //this.peoclass.DataSource = sdr;
            //this.peoclass.DataTextField = "用户类型";
            //this.peoclass.DataValueField = "用户类型编号";
            //this.peoclass.DataBind();
            //sdr.Close();
        }


        //关闭窗口；
        this.btnqx.Attributes.Add("onclick", "window.close()");
        
    }
    
    
    protected void btndl_Click(object sender, EventArgs e)
    {
        //验证用户
        string username = Request["username"];
        string userpwd = Request["userpwd"];
        SqlConnection con = new SqlConnection("server=.;database=shop;uid=sa;pwd=;");
        con.Open();
        SqlCommand cmd = new SqlCommand("select count(*) from login where 用户名='" + username + "'and 用户密码='" + userpwd + "'", con);
        int count = Convert.ToInt32(cmd.ExecuteScalar());
        if (count > 0)
        {
            Response.Redirect("main.aspx");
        }
        else
        {
            Response.Write("<script>alert('用户名或者密码错误，请重新输入！');</script>");
            return;
        }

       
    }
    protected void btnqx_Click(object sender, EventArgs e)
    {
        
    }
    protected void peoclass_TextChanged(object sender, EventArgs e)
    {

    }
    protected void peoclass_SelectedIndexChanged(object sender, EventArgs e)
    {
        
    }
    protected void userpwd_TextChanged(object sender, EventArgs e)
    {

    }
}