SmartDoorLock_G3/Team.Utility/RegularHelper.cs

using System.Text.RegularExpressions;

namespace Team.Utility
{
    public static class RegularHelper
    {
        public static bool CheckIpAddress(string ip)
        {
            if (string.IsNullOrWhiteSpace(ip))
            {
                return false;
            }
            Regex ipRegex = new
                    (@"^((2[0-4]\d|25[0-5]|(1\d{2})|([1-9]?[0-9]))\.){3}(2[0-4]\d|25[0-4]|(1\d{2})|([1-9][0-9])|([1-9]))$");
            return ipRegex.IsMatch(ip);
        }
    }
}