ASP.NET获取客户端IP及MAC地址

ASP.NET获取客户端IP及MAC地址 ASP.NET获取客户端IP及MAC地址很多时候非常必要的，像做投票、留言、评论 等系统的 时候防止别人恶意操作，导致数据的虚假行。下面介绍获取客户端的IP和MAC地址的， 仅供参考： 获取客户端IP: private string GetClientIP() { string result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]; if (null == result || result == String.Empty) { result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"]; } if (null == result || result == String.Empty) { result = HttpContext.Current.Request.UserHostAddress; } return result; } 获取MAC地址: [DllImport("Iphlpapi.dll")] private static extern int SendARP(Int32 dest,Int32 host,ref Int64 mac,ref Int32 length); [DllImport("Ws2_32.dll")] private static extern Int32 inet_addr(string ip); private void Page_Load(object sender, System.EventArgs e) { // 在此处放置用户代码以初始化页面 try { string userip=Request.UserHostAddress; string strClientIP = Request.UserHostAddress.ToString().Trim(); Int32 ldest = inet_addr(strClientIP); //目的地的ip Int32 lhost = inet_addr(""); //本地服务器的ip Int64 macinfo = new Int64(); Int32 len = 6; int res = SendARP(ldest,0, ref macinfo, ref len); string mac_src=macinfo.ToString("X"); if(mac_src == "0") { if(userip=="127.0.0.1") Response.Write ("正在访问Localhost!"); else Response.Write ("欢迎来自IP为" + userip + "的朋友！" + "
"); return; } while(mac_src.Length<12) { mac_src = mac_src.Insert(0,"0"); } string mac_dest=""; for(int i=0;i<11;i++) { if (0 == (i % 2)) { if ( i == 10 ) { mac_dest = mac_dest.Insert(0,mac_src.Substring(i,2)); } else { mac_dest ="-" + mac_dest.Insert(0,mac_src.Substring(i,2)); } } } Response.Write ("欢迎来自IP为"+userip+ "
" + ",MAC地址为"+mac_dest+"的朋 友！" + "
"); } catch(Exception err) { Response.Write(err.Message); } }