Login.aspx.cs

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

using System.Data;

public partial class l : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Session.Clear();
        if (!this.IsPostBack)
        {
            tbPassword.TabIndex = 2;
            tbUserName.TabIndex = 1;
            tbPassword.Text = "";
            tbUserName.Text = "";
            Session["firstbid"] = "";
        }
    }
    protected void btnLogin_Click(object sender, EventArgs e)
    {
        Class_Object_System mycon = new Class_Object_System();
        Class_Function_Data datadeal = new Class_Function_Data();
        string username = tbUserName.Text.ToString().Trim();
        string password = tbPassword.Text.ToString().Trim();
        string qx = "";
        string sqlstr = "select username, password, qx from UserInfo where username = '" + username + "'";
        DataTable data = datadeal.DBP(2, 2, mycon.SysDataBaseAddress, "", "", "", "", sqlstr);
        if (data.Rows.Count > 0)
        {
            if (password == data.Rows[0][1].ToString().Trim())
            {
                //seseion
                qx = data.Rows[0][2].ToString().Trim();
                Session.Remove("qx");
                Session["qx"] = qx;
                Session.Remove("UserName");
                Session["UserName"] = username;
                Session.Remove("password");
                Session["password"] = password;

                Response.Redirect("Default.aspx");
            }
            else
            {
                labMessage.Text = "连接失败";
            }
        }
        else
        {
            labMessage.Text = "用户名或者密码错误！";
        }
    }
    protected void btnClear_Click(object sender, EventArgs e)
    {
        tbPassword.Text = "";