把IP转换成数字

private static long ConvertIpToNumber(string strIpAddress)

{

long tmpIpNumber = 0;

if (strIpAddress != null && strIpAddress.Trim() != "")

{

string[] arrayIP = strIpAddress.Split('.');

long sip1 = long.Parse(arrayIP[0]);

long sip2 = long.Parse(arrayIP[1]);

long sip3 = long.Parse(arrayIP[2]);

long sip4 = long.Parse(arrayIP[3]);

tmpIpNumber = sip1 * 256 * 256 * 256 + sip2 * 256 * 256 + sip3 * 256 + sip4;

}

return tmpIpNumber;

}