20130310整理过的IP数据库只含省市地县数据mdb

20130310 整理过的纯真IP数据库 只含省市地县数据 已经导出成mdb数据库 使用时利用这样的存储过程 CREATE PROCEDURE GetIPAddress @IPID bigint AS BEGIN SELECT * FROM IPAddress WHERE @IPID BETWEEN Starid AND Endid END 参数通过IP地址转换获得，胡方式为(c#) public static long ipToLong(String strIP) { long[] ip = new long[4]; string[] s = strIP.Split('.'); ip[0] = long.Parse(s[0]); ip[1] = long.Parse(s[1]); ip[2] = long.Parse(s[2]); ip[3] = long.Parse(s[3]); return (ip[0] << 24) + (ip[1] << 16) + (ip[2] << 8) + ip[3]; } 反向： public static String long2IP(long longIP) { StringBuilder sb = new StringBuilder(""); sb.Append(longIP >> 24); sb.Append("."); sb.Append((longIP & 0x00FFFFFF) >> 16); sb.Append("."); sb.Append((longIP & 0x0000FFFF) >> 8); sb.Append("."); sb.Append((longIP & 0x000000FF)); return sb.ToString(); }