login.aspx.cs

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


public partial class login  : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        
        if(!IsPostBack)
        {
            
            
        }
    }

        /// <summary>
    /// 登录
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnLogin_Click(object sender, EventArgs e)
    {
        //根据用户名和密码得到用户信息
        DataSet ds = null;

        if(RadioButtonList1.SelectedValue=="买家")
        {
            ds = DbHelperSQL.Query("select * from members where lname='" + txt_lname.Text + "' and pwd='" + txt_pass.Text + "'");
        }
        else
        {
            ds = DbHelperSQL.Query("select * from Seller where lname='" + txt_lname.Text + "' and pwd='" + txt_pass.Text + "'");
        }

        //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["lname"] = dr["lname"].ToString();
            Session["sf"] = RadioButtonList1.SelectedValue;


            //跳转          
            Response.Redirect("member/default.aspx");

        }
        else
        {
            MessageBox.Show(this, "用户名或密码错误！");
            return;
        }