将十进制IP转换成二进制IP

　　　　　　　　　　　/// <summary>
		/// 将十进制IP转换成二进制IP
		/// </summary>
		/// <param name="strIP">IP字符串</param>
		public string ChangeIP(string strIP)
		{
			string strHtml = "";
			string[] IParray = strIP.Split('.');  //拆分IP
			int IP1 = Convert.ToInt32(IParray[0]);
			int IP2 = Convert.ToInt32(IParray[1]);
			int IP3 = Convert.ToInt32(IParray[2]);
			int IP4 = Convert.ToInt32(IParray[3]);

			string strIP1 = GetIP(IP1);
			string strIP2 = GetIP(IP2);
			string strIP3 = GetIP(IP3);
			string strIP4 = GetIP(IP4);

			strHtml = strIP1 + strIP2 + strIP3 + strIP4;
			return strHtml;
		}
返回值为2进制IP

　　　　　/// <summary>
        /// 得到二进制IP
        /// </summary>
        /// <param name="IP">十进制型IP</param>
        public string GetIP(int IP)
        {
            string strIP = Convert.ToString(IP,2);
            int len = strIP.Length;
            if(len<8)
            {
                for(int i=0;i<8-len;i++)
                {
                    strIP = "0" + strIP;
                }
            }
            return strIP;
        }