?using System;
using System.Data;
using System.Data.SqlClient;
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 userlogin : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        SqlConnection conn = db.createconn();
        conn.Open();
        SqlCommand Cmd = new SqlCommand("select * from user1 where u_log='" + txtuser.Text + "' and u_pwd = '" + txtpwd.Text + "' ", conn);
        SqlDataReader dr = Cmd.ExecuteReader();
        if (txtuser.Text != "" && txtpwd.Text != "")
        {
            if (dr.Read())
            {
                Session["user"] = dr["u_name"].ToString();
                Session["id"] = dr["u_id"].ToString();
                Session["ok"] = "ok";
                Response.Redirect("productadd.aspx");
            }
            else
            {
                Response.Write("<script>alert('您還不是注冊(cè)用戶或用戶名和密碼錯(cuò)誤,不能發(fā)布您的產(chǎn)品！');history.go(-1);</script>");
            }
        }
        else
        {
            Response.Write("<script>alert('請(qǐng)輸入用戶名和密碼！');history.go(-1);</script>");
        }
    }
}