zipExtractFileList (Function)

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Error codes
Extracted file
Extraction and password
Stored path
Extraction from a multi-part archive on diskettes

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zipExtractFileList (Function)

In french: zipExtraitListeFichier

Extracts and decompresses a list of files found in an archive to a physical location.

New in version 2025

The gzip format (.gz extension) is now supported.

Example

Archive is zipArchive
// Ouverture d'une archive
ResOuvreArchive = zipOpen(Archive, "C:\Archives\Archive.zip")
IF ResOuvreArchive = 0 THEN
	...
	 // Extraction d'un fichier à son emplacement d'origine
	 ResExtraitFichier = zipExtractFileList(Archive, "\Temp\Fichier.doc" + ...
		CR + "\Temp\Fichier2.doc", zipDrive)
	...
END

Syntax

<Result> = zipExtractFileList(<Archive> , <List of paths> [, <Destination> [, <Options> [, <WLanguage procedure> [, <Progress>]]]])

<Result>: Integer

0 if the files have been extracted,
An error code (value greater than 0) otherwise. For more details on these error codes, see the Remarks.

<Archive>: Character string or zipArchive variable

Name of the archive to be used.
This name can correspond to:
an archive name defined with zipOpen or zipCreate.
the name of a variable of type zipArchive.
zipArchive variables are not available in Java.

<List of paths>: Character string

List of stored paths of files that will be extracted from the archive. The different paths are separated by CR characters (Carriage Return).
Performs an exact-match search on each path of files found in the archive.

<Destination>: Optional character string or constant

Destination path of extracted files:
Optional character string: Files are extracted to the specified path, to which the file's memorized tree structure is added (the disk is not preserved). The specified path is created if it does not exist.
Optional constant:
zipDirectory
(Default value) Extraction into the current directory without restoring the tree structure of the files (if it was stored).
zipDrive Extraction:
to the initial location of the files if it was stored and if the drive exists.
while restoring the tree structure of the files on the current drive if the drive or the stored directory does not exist.
in the current directory if only the name and extension of the files have been stored.
This constant is not available. The directories have no root.
This constant and zipDirectory will have the same effect.
Archives in format 7z: This constant will have the same effect as the constant zipDirectory.
zipNone Extraction into the current directory without restoring the tree structure of the files (if it was stored).

<Options>: Optional Integer constant

Configure the extraction (if <Destinations> corresponds to a character string):
zipOverwrite During the extraction, the existing read-only files are automatically overwritten by the extracted files.
This constant is not available.

<WLanguage procedure>: Optional procedure name

Name of the WLanguage procedure that will be called if an error occurs when extracting files. This procedure has the following format:
PROCEDURE ProcedureName (<Error Code>, <File Name>)
where:
<Error code> is an integer corresponding to the code of the error that occurred when extracting the file.
<File name> is a character string that contains the path of the file processed by zipExtractFileList.
The procedure can return one of the following constants:
zipCancel Cancels the extraction of files from the archive.
zipIgnore Ignores the file in error.
zipRetry Retries the file extraction.

This procedure must be a server procedure.
This parameter is not allowed.

<Progress>: Control name or procedure name

Progress bar management mode. This parameter can correspond to:
the name of a Progress Bar control found in a window. The progress bar will display the progress regarding the extraction of all the files used.
the name of a WLanguage procedure. This procedure has the following format:
<Procedure name> (<Current file>, <Global progress percentage>,
<File progress percentage >)

where:
<Current file> corresponds to the name of the file currently processed.
<Global progress percentage> corresponds to the progress percentage of the extraction of files from the archive.
<File progress percentage> corresponds to the progress percentage of the file being extracted from the archive.
If you handle an:
in TAR, gzip or TGZ (TAR.GZ) formatProgressBar is updated only when each file has been extracted.
in CAB and RAR format, the progress bar is refreshed at the end of the extraction of each file.
in 7z format, only <Overall progress percentage> is specified. <File progress percentage> will have the same value.
The procedure must be a server procedure.

Remarks

Error codes

The following error codes are returned:

1: Path passed as parameter does not exist.
2: Access denied: user does not have sufficient rights.
3: The archive is corrupt.
4: The path does not exist in the archive.
6: Sub-archive files are not in order (case of extraction from a multi-part archive).
21: The password specified is not correct.

The message corresponding to the error code is returned by zipMsgError.

Remarks:

Only archives in ZIP, TAR, gzip and TGZ (TAR.GZ) formats are available.
Only ZIP archives are available.

Extracted file

The extracted files are not deleted from the archive. To delete one file or all the files from the archive, use zipDeleteFile or zipDeleteAll.

Extraction and password

If the file is not encrypted and if zipPassword was used:

Archive in WDZ format: The file is still extracted.
Archive in ZIP format: An error appears.

Stored path

The table below presents the paths stored in the archive according to:

the access path to the file,
the stored path section.

The current directory is: "C:\Temp".


zipAddFile	File location	zipNone	zipDirectory	zipDrive
zipAddFile("Archi", "File.txt")	C:\Temp\File.txt	File.txt	File.txt	File.txt
zipAddFile("Archi", "Data\File.txt")	C:\Temp\Data\File.txt	File.txt	Data\File.txt	Data\File.txt
zipAddFile("Archi", "D:\Data\File.txt")	D:\Data\File.txt	File.txt	Data\File.txt	D:\Data\File.txt

Remark: If the constant zipDisk is used:

the WDZ format stores the full path of the file (including the drive letter).
the ZIP format does not store the drive letter.
the 7z format stores the directories only.

The zipDrive constant is equivalent to the zipDirectory constant.

Extraction from a multi-part archive on diskettes

If the files to extract are found on different diskettes, the corresponding diskette is automatically requested.

Business / UI classification: Business Logic

Component: wd300zip.dll