주 소 를 IPV 4 로 판단 하 는 정규 표현 식

        #region //IPV4       
        public static bool IsIPv4Address(string ip)
        {
            string pattern = @"^(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]

|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]

|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])$";
            Regex r = new Regex(pattern);
            Match m = r.Match(ip);
            return m.Success;
        }
        #endregion

     
     
   
   

      
      
      
    
    IPHostEntry IpEntry 
      
      
    
    =
      
      
    
     Dns.GetHostEntry(Dns.GetHostName());

                
      
      
    
    for
      
      
    
     (
      
      
    
    int
      
      
    
     i 
      
      
    
    =
      
      
    
     
      
      
    
    0
      
      
    
    ; i 
      
      
    
    !=
      
      
    
     IpEntry.AddressList.Length; i
      
      
    
    ++
      
      
    
    )
                {
                    
      
      
    
    if
      
      
    
     (IsIPv4Address(IpEntry.AddressList[i].ToString()))
                    {
                       comboBox1.Items.Add(IpEntry.AddressList[i]);
                    }
                }