ASP.NET 用户IP地址屏蔽/禁止访问

项目机构:

 

说明：

(1)添加全局文件,Global.asax

(2)添加IP地址屏蔽处理类：IPAddressFactory.cs

 

 1.Global.asax 代码实现

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.SessionState;

namespace ShieldingIP
{
    public class Global : System.Web.HttpApplication
    {
        protected void Application_Start(object sender, EventArgs e)
        {
        }

        protected void Session_Start(object sender, EventArgs e)
        {
        }

        ///<summary>
        /// 开始请求
        ///</summary>
        ///<param name="sender"></param>
        ///<param name="e"></param>
        protected void Application_BeginRequest(object sender, EventArgs e)
        {
            string UserIPAddress = HttpContext.Current.Request.UserHostAddress;//获得远程访问主机的IP地址

            bool BolIsShield = IPAddressFactory.Instance.IsShielding(UserIPAddress);//判断远程访问的用户的IP地址是否已经被屏蔽
            if (BolIsShield)
            {
                HttpContext.Current.Response.Write("您已经被系统屏蔽！");
                HttpContext.Current.Response.End();
            }
        }

        protected void Application_AuthenticateRequest(object sender, EventArgs e)
        {
        }

        protected void Application_Error(object sender, EventArgs e)
        {
        }

        protected void Session_End(object sender, EventArgs e)
        {
        }

        protected void Application_End(object sender, EventArgs e)
        {
        }
    }
}

 

2.IPAddressFactory.cs 代码实现 

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace ShieldingIP
{
    ///<summary>
    /// IP地址处理类
    ///</summary>
    public class IPAddressFactory
    {
        private static IPAddressFactory ipfactory = new IPAddressFactory();
        public static IPAddressFactory Instance
        {
            get
            {
                return ipfactory;
            }
        }
        ///<summary>
        /// 判断IP地址是否已被屏蔽
        ///</summary>
        ///<param name="_IPadress"></param>
        ///<returns></returns>
        public bool IsShielding(string _IPadress)
        { 
            //这里我们应该有自己的一个屏蔽IP地址库，直接判断库中是否存在当前IP地址即可
            //这里为了方便演示，我直接虚拟一个屏蔽库
            List<string> IpAddressList = new List<string>();
            IpAddressList.Add("10.13.11.24");
            IpAddressList.Add("10.13.11.25");
            IpAddressList.Add("10.13.11.26");
            IpAddressList.Add("10.13.11.27");
            IpAddressList.Add("10.13.11.28");
            IpAddressList.Add("10.13.11.29");
            IpAddressList.Add("127.0.0.1");//本机的IP地址,测试效果使用
            if (IpAddressList.Contains(_IPadress))
            {
                return true;
            }
            return false;
        }
    }
}

 

运行测试效果如果下：

 

 源码下载