Login.aspx.cs

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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
{
    SqlHelper data = new SqlHelper();
    SqlDataReader dr;
    Alert js = new Alert();
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    private void chkUser()
    {
        if (TxtUserName.Text == "" && TxtPassword.Text == "")
        {
            Alert.AlertAndRedirect("账号和密码不能为空！", "Login.aspx");
        }
        else
        {
            if (Identify.Text == "管理员") //如果是管理员
            {
               //判断管理员账号和密码的sql语句
                 dr = data.GetDataReader("select * from  [UserInfo] where UserNumber='" + TxtUserName.Text.Trim() + "'and Pwd='" + TxtPassword.Text.Trim() + "' ");
                 if (dr.Read())
                 {
                     Session["userid"] = dr["Userid"].ToString();//把用户ID保存在session中
                     Session["usernumber"] = dr["UserNumber"].ToString();//把用户编号保存在session中
                     Session["username"] = dr["UserName"].ToString();//把 用户姓名保存在session中
                     Response.Redirect("Admin/manage.aspx");//跳转到主页面
                 }
                 else
                 {
                     Alert.AlertAndRedirect("账号或者密码不对请重新登陆！", "Login.aspx");
                 }
            }
            else if (Identify.Text == "教师")
            {
                dr = data.GetDataReader("select * from  [Teacher] where Number='" + TxtUserName.Text.Trim() + "'and mima='" + TxtPassword.Text.Trim() + "' ");
                if (dr.Read())
                {
                    Session["userid"] = dr["ID"].ToString();
                    Session["usernumber"] = dr["Number"].ToString();
                    Session["username"] = dr["Name"].ToString();
                    Response.Redirect("Teacher/manage.aspx");
                }
                else
                {
                    Alert.AlertAndRedirect("账号或者密码不对请重新登陆！", "Login.aspx");
                }
            }