ASP.net做的IP访问限制

　　偶做留言本的时候想起做这么个,具体思路也许不好,做出来只是抛砖引玉,希望有更好的方法!

　　IP添加页是用了一个ListBox, TextBox,两个Button，而在其他的页上则直接用当前IP对比数据库中的IP,代码如下!

　　限制IP添加页HTML代码

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ip.aspx.cs" Inherits="admin_ip" %>
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">


   
   


   

　　限制IP添加页CS代码

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_ip : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Server.Execute("chklog.aspx");
    }
    protected void Button1_Click(object sender, EventArgs e)
    {       
        iplxb.Items.Add(iptb.Text);
        odb.insert("insert into ip (ip) values ('" + iptb.Text + "')");
    }
    protected void linkButton1_Click(object sender, EventArgs e)
    {
        for (int i = 0; i < iplxb.Items.Count; i++)
        {
            if (iplxb.Items[i].Selected)
            {
                odb.insert("delete from ip where ip='"+iplxb.SelectedItem.Text+"'");
                iplxb.Items.Remove(iplxb.SelectedItem.Text);
            }
        }
    }
}

　　被需要限制IP的页面调用页的代码

 protected void Page_Load(object sender, EventArgs e)
    {
        string ip = Request.UserHostAddress.ToString();
            if (Convert.ToInt32(odb.scr("select count(*) from [ip] where ip='" + ip + "'")) > 0)
            Response.Write("对不起，您的IP被限制访问，请咨询管理员");
    }
}