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)
    {
        if (!IsPostBack)
        {

        }
    }

  
    /// <summary>
    /// 验证系统管理登陆
    /// </summary>
    private void ChkAdmin()
    {
        if (TxtUserName.Text == "" && TxtPassword.Text == "")
        {
            Alert.AlertAndRedirect("没有输入账号和密码！", "Login.aspx");


        }
        else
        {
            dr = data.GetDataReader("select * from  Admin where Admin='" + TxtUserName.Text.Trim() + "'and Pwd='" + TxtPassword.Text.Trim() + "'");
            if (dr.Read())
            {
                Session["admin"] = dr["Admin"].ToString();
                Response.Redirect("Manger/Index.htm");

            }
            else
            {
                Alert.AlertAndRedirect("账号或者密码不对请重新登陆！", "Login.aspx");
            }
        }
    }
    /// <summary>
    /// 验证教师登陆
    /// </summary>
    private void ChkTeacher()
    {
        if (TxtUserName.Text == "" && TxtPassword.Text == "")
        {
            Alert.AlertAndRedirect("没有输入账号和密码！", "Login.aspx");