Admin_Login.aspx.cs

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Text;
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.Web.SessionState;
using Yu.Components;

public partial class Admin_Login : Admin
{
    string VNum = "";
    protected void Page_Load(object sender, EventArgs e)
    {
        
        Response.Buffer = true;
        Response.ExpiresAbsolute = DateTime.Now.AddSeconds(-1);
        Response.Expires = 0;
        Response.CacheControl = "no-cache";         
       
        if (Session["CheckCode"] != null)
        {
            VNum = Session["CheckCode"].ToString();
            ViewState["Check"] = VNum.ToLower();
            Session["CheckCode"] = null;
        }
        if (Page.IsPostBack)
        {
            TxtUser.Focus();
        }        
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        
        string AUser = TxtUser.Text.Trim().ToLower();
        string APass = TxtPass.Text.ToString().ToLower();
        string Acode = TxtCode.Text.ToLower();
        string Vstate = ViewState["Check"] as string;
        
       
        if (Acode == Vstate)
        {

            int nLogin = uLogin(AUser, md5(APass, 32));  //判断是否登陆
            if (nLogin == 0)
            {
                Session["Admin"] = AUser;
                ViewState["VNum"] = "";
                Response.Redirect("Admin_Index.aspx");                
            }
            else
            {

                //注册script脚本
                StringBuilder scriptsing = new StringBuilder();