ASP.NET»ñÈ¡¿Í»§¶ËIP/Óû§ÃûµÈÐÅÏ¢

1. ÔÚASP.NETÖÐרÓÃÊôÐÔ£º
»ñÈ¡·þÎñÆ÷µçÄÔÃû£ºPage.Server.ManchineName
»ñÈ¡Óû§ÐÅÏ¢£ºPage.User
»ñÈ¡¿Í»§¶ËµçÄÔÃû£ºPage.Request.UserHostName
»ñÈ¡¿Í»§¶ËµçÄÔIP£ºPage.Request.UserHostAddress
2. ÔÚÍøÂç±à³ÌÖеÄͨÓ÷½·¨£º
»ñÈ¡µ±Ç°µçÄÔÃû£ºstatic System.Net.Dns.GetHostName()
¸ù¾ÝµçÄÔÃûÈ¡³öÈ«²¿IPµØÖ·£ºstatic System.Net.Dns.Resolve(µçÄÔÃû).AddressList
Ò²¿É¸ù¾ÝIPµØÖ·È¡³öµçÄÔÃû£ºstatic System.Net.Dns.Resolve(IPµØÖ·).HostName
3. ϵͳ»·¾³ÀàµÄͨÓÃÊôÐÔ£º
µ±Ç°µçÄÔÃû£ºstatic System.Environment.MachineName
µ±Ç°µçÄÔËùÊôÍøÓò£ºstatic System.Environment.UserDomainName
µ±Ç°µçÄÔÓû§£ºstatic System.Environment.UserName   
4. if(Request.ServerVariables["HTTP_VIA"]!=null){   string user_IP=Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
}else{
string user_IP=Request.ServerVariables["REMOTE_ADDR"].ToString();
}    
5.<%=Request.UserHostAddress%>
6.»ñÈ¡¿Í»§¶ËIP:
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;
   }
»ñÈ¡MACµØÖ·:
[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)
   {
    // ÔÚ´Ë´¦·ÅÖÃÓû§´úÂëÒÔ³õʼ»¯Ò³Ãæ
    try
    {