VB程序员的FTP编程指南1.3-列出、改变目录

列出目录

你可以使用dir命令来列出目录。实际上，dir并不是ftp规定的命令，但是标准的用户界面从操作系统借用了这个命令。

图2 显示了dir命令的结果。最右边是文件或目录的名称，然后是文件日期和时间。然后是10位的文件属性。你可以通过"d"属性分别目录或文件。如果是"d",表示这是个目录。

改变目录

你可以通过cd命令改变目录。和dos命令的区别是它使用正斜杠。例如改变目录到 /developr/vb directory：

ftp> cd developr/vb
250 cwd command successful.

再次使用dir命令，你可以获得文件列表。图3 显示了 dir命令在ftp.microsoft.com的 /developr/vb 目录的执行结果。

图 2 dir命令

ftp>dir
200 port command successful.
150 opening ascii mode data connection for /bin/ls.
d-----     1 owner group       0   jul  3 13:52    bussys
d-----     1 owner group       0   aug  9  3:00    deskapps
d-----     1 owner group       0   oct 27  7:35    developr
-----      1 owner group    7905   oct  5  8:53    dirmap.htm
-----      1 owner group    4510   oct  5  8:52    dirmap.txt
-----      1 owner group     712   aug 25  1994    disclaimer.txt
-----      1 owner group     860   oct  5  1994    index.txt
d-----     1 owner group           aug 31  12:17   kbhelp
-----      1 owner group 7393252   nov 28  4:04    ls-lr.txt
-----      1 owner group  914179   nov 28  4:05    ls-lr.z
-----      1 owner group  766409   nov 28  4:04    ls-lr.zip
d-----     1 owner group       0   oct 20  9:27    mscorp
-----      1 owner group   28160   nov 28  1994    msnbro.doc
-----      1 owner group   22641   feb  8  1994    msnbro.txt
d-----     1 owner group       0   oct 11  3:00    peropsys
d-----     1 owner group       0   aug 23  21:55   products
d-----     1 owner group       0   oct  5  8:46    services
d-----     1 owner group       0   nov 22  14:38   softlib
-----      1 owner group    5095   oct 20  1993 support-phones.txt
-----      1 owner group     802   aug 25  1994    whathappened.txt
226 transfer complete.
1407 bytes received in 0.99 seconds (1.42 kbytes/sec)

图 3 microsoft的/developr/vb directory目录

ftp> dir
200 port command successful.
150 opening ascii mode data connection for /bin/ls.
d-----        1 owner group               0 oct 25  6:39 kb
d-----        1 owner group               0 feb 24 11:35 public
-----         1 owner group            1571 aug 24  1994 readme.txt
d-----        1 owner group               0 aug 24  1994 unsup-ed
226 transfer complete.
270 bytes received in 0.22 seconds (1.23 kbytes/sec)

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