C#转换IP地址(值)

 

/**//// <summary>
///将IP的值转换为IP地址/// </summary>
/// <param name="ipLong">要进行转换的IP值</param>
/// <returns>string转换后的IP地址</returns>
public string ConvertToIP(long ipLong)
        ...{
            string strip="";
            string ip1,ip2,ip3,ip4;
        
            ip1=int.Parse(ipLong / 16777216);//16777216=2^24
            ip2=int.Parse(ipLong % 16777216 / 65536);//65536=2^16
            ip3=int.Parse((ipLong % 16777216 % 65536)/256);//256=2^8;
            ip4=int.Parse(ipLong%16777216 % 65536%256);
            strip=ip1.ToString()+"."+ip2.ToString()+"."+ip3.ToString()+"."+ip4.ToString();
            return strip;
        }
/**//// <summary>
///将IP地址转换为IP的值
/// </summary>
/// <param name="ip">要进行转换的IP地址</param>
/// <returns>long 转换后的IP地址的值</returns>
public long ConvertToIPValue(string ip)
...{
               string [] ipList=ip.Split('.');
                long ipvalue=long.Parse(ipList[3])+long.Parse(ipList[2])*256+long.Parse(ipList[1])*256*256+long.Parse(ipList[0])*256*256*256;
                return ipvalue;
}