Question Re: DirList in Technology Q&A

DirList

Former Member — Tue, 25 Feb 2014 08:40:35 GMT

Hi,

Just wondering how Dirlist sorts its files retrieved ?

It seems to me that Dirlist (when reading a folder containing hundreds of files) randomly sorts its files or is there any kind of logic to be found in its sorting process ?

Second : to be able to process the files of a folder based on their creation date and time (oldest files first), i guess i need to use a datawindow and some api calls (findfirstfile etc.) ? I remember someone posted an example of this a while back ... Anybody still have this link please ?

TIA

John

Re: DirList

Former Member — Tue, 25 Feb 2014 09:22:32 GMT

There is a solution in PFC (see PFC - Home) in the file service. The function of_dirlist in pfc_n_cst_filesrvunicode contains all you need to get the files with its properties (e.g. creation time). In of_sortdirlist of pfc_n_cst_filesrv you can find a solution for sorting the files using a datawindow.

Re: DirList

Former Member — Tue, 25 Feb 2014 09:25:36 GMT

Hi,

you can use these APIs to browse a folder :

FUNCTION ulong FindFirstFile(ref string lpszSearchFile, ref WIN32_FIND_DATA lpffd) LIBRARY "kernel32.dll" ALIAS FOR "FindFirstFileW"

FUNCTION boolean FindNextFile(ulong hfindfile, ref WIN32_FIND_DATA lpffd) LIBRARY "kernel32.dll" ALIAS FOR "FindNextFileW"

structure str_filetime :

global type str_filetime from structure

ulong ul_LowDateTime

ulong ul_HighDateTime

end type

and structure WIN32_FIND_DATA :

global type win32_find_data from structure

unsignedlong dwfileattributes

str_filetime ftcreationtime

str_filetime ftlastaccesstime

str_filetime ftlastwritetime

unsignedlong nfilesizehigh

unsignedlong nfilesizelow

unsignedlong dwreserved0

unsignedlong dwreserved1

character filename[260]

character altfilename[14]

end type

Regards.

Abdallah.

Re: DirList

Former Member — Tue, 25 Feb 2014 18:48:50 GMT

I have an example with many of the file Win API functions.

Topwiz Software - Filesys

Re: DirList

Former Member — Wed, 26 Feb 2014 00:47:16 GMT

The sort order would be by name if you have Sorted property set to true.

For dated sort go with TopWiz