根据IP段随机生成IP

    class CIP
    {
        private uint ip1;
        private uint ip2;
        public string ips = "";

        public CIP(string ips)
        {
            this.ips = ips.Trim();
            string[] ss = this.ips.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
            if (ss.Length == 2)
            {
                ip1 = IPToInt(ss[0]);
                ip2 = IPToInt(ss[1]);
            }
        }

        public string IP1
        {
            get
            {
                return IntToIP(ip1);
            }
        }

        public string IP2
        {
            get
            {
                return IntToIP(ip2);
            }
        }

        public string RanIP
        {
            get
            {
                Random ra = new Random(unchecked((int)DateTime.Now.Ticks));
                int len = (int)(ip2 - ip1);
                uint ip = ip1 + (uint)ra.Next(len);
                return IntToIP(ip);
            }
        }

        ///

        /// 将字符串形式的IP转换位uint
        ///
        ///
        ///
        public static uint IPToInt(string strIP)
        {
            byte[] ip_bytes = new byte[4];
            string[] strArr = strIP.Split(new char[] { '.' });
            for (int i = 0; i < 4; i++)
            {
                ip_bytes[i] = byte.Parse(strArr[3 - i]);
            }
            return BitConverter.ToUInt32(ip_bytes, 0);
        }

        /// 

        /// 将uint形式的IP转换为字符串形式
        /// 
        /// 
        /// 
        public static string IntToIP(uint ip)
        {
            byte[] ip_bytes = BitConverter.GetBytes(ip);
            string ip_str = "";
            for (int i = 0; i < 4; i++)
            {
                ip_str += ((int)ip_bytes[3 - i]).ToString() + ".";
            }
            ip_str = ip_str.Remove(ip_str.Length - 1);
            return ip_str;
        }
    }