C# 獲取客戶端主機位址 (真實ip 或代理 ip)

      
        if (HttpContext.Current.Request.ServerVariables["HTTP_VIA"] != null)
        {
          ClientIP = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
          //取得真實用戶端的IP
        }
        else
        {
          ClientIP = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
          //取得用戶端的IP(有可能為代理伺服器)
        }