admin/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;


public partial class admin_login : System.Web.UI.Page
{

    db DB = new db();

    protected void Page_Load(object sender, EventArgs e)
    {
        this.Image2.Attributes.Add("onclick", "this.src='RandomNumImg.aspx?'+Math.random();");
    }
    protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
    {

        if (Page.IsValid == true)
        {
            string webnz = this.webnz.Value.ToUpper();
            if (webnz == Session["validateNum"].ToString())
            {
                string webname = this.webname.Value.ToString();


                string webpaw =this.webpaw.Value.ToString();

                DataSet ds = DB.mydata("select * from admin where admin='" + webname + "'and password='" + webpaw + "'");
                int count = ds.Tables[0].Rows.Count;
                if (count <= 0)
                {
                    Response.Write("<script>alert('帐号或密码错误！！！')</script>");

                   
                }
                else
                {
                    Session["isadminlogins"] = webname;

                    Server.Transfer("index.html");
                }
            }
            else
            {
               Response.Write("<script>alert('验证码错误！！！')</script>");
                
            }


        }
    }
}