zipCompressionLevel (Function)

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Compression level and addition time
Notes

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zipCompressionLevel (Function)

In french: zipNiveauCompression

Changes the compression level used when creating an archive in ZIP format or in 7z format.

Versions 15 and later

This function is now available for Java applications.

This function is now available for Android applications.

New in version 15

This function is now available for Java applications.

This function is now available for Android applications.

This function is now available for Java applications.

This function is now available for Android applications.

Versions 17 and later

This function is now available for iPhone/iPad applications.

New in version 17

This function is now available for iPhone/iPad applications.

Versions 18 and later

This function is now available in Android Widget mode.

This function now supports the 7z format.

New in version 18

This function is now available in Android Widget mode.

This function now supports the 7z format.

This function is now available in Android Widget mode.

This function now supports the 7z format.

Versions 19 and later

This function is now available in Windows Store apps mode.

New in version 19

This function is now available in Windows Store apps mode.

Versions 21 and later

This function is now available in Universal Windows 10 App mode.

New in version 21

This function is now available in Universal Windows 10 App mode.

Example

NumZipErr is int

// Create the archive named "MyArchive"
NumZipErr = zipCreate("MyArchive", "C:\MyDocuments\Archive.zip")
IF NumZipErr <> 0 THEN
Error(zipMsgError(NumZipErr))
RETURN
END

// Add a file and use the default compression level (6)
NumZipErr = zipAddFile("MyArchive", "C:\MyImages\Image1.jpg", zipNone)
IF NumZipErr <> 0 THEN
Error(zipMsgError(NumZipErr) + "On the file " + zipCurrentFile("MyArchive"))
END

// Change the compression level
// The next file will be stored (no compression)
zipCompressionLevel("MyArchive", 0)

// Add a file
NumZipErr = zipAddFile("MyArchive", "C:\MyImages\Image2.jpg", zipNone)
IF NumZipErr <> 0 THEN
Error(zipMsgError(NumZipErr) + "On the file " + zipCurrentFile("MyArchive"))
END

NumZipErr is int
MyArchive is zipArchive

// Create the archive named "MyArchive"
NumZipErr = zipCreate(MyArchive, "C:\MyDocuments\Archive.zip")
IF NumZipErr <> 0 THEN
Error(zipMsgError(NumZipErr))
RETURN
END

// Add a file and use the default compression level (6)
NumZipErr = zipAddFile(MyArchive, "C:\MyImages\Image1.jpg", zipNone)
IF NumZipErr <> 0 THEN
Error(zipMsgError(NumZipErr) + "On the file " + zipCurrentFile(MyArchive))
END

// Change the compression level
// The next file will be stored (no compression)
zipCompressionLevel(MyArchive, 0)

// Add a file
NumZipErr = zipAddFile(MyArchive, "C:\MyImages\Image2.jpg", zipNone)
IF NumZipErr <> 0 THEN
Error(zipMsgError(NumZipErr) + "On the file " + zipCurrentFile(MyArchive))
END

Syntax

<Result> = zipCompressionLevel(<Archive> , <Compression level>)

<Result>: Integer

0 if the compression level was changed,
An error code (value greater than 0) otherwise (see the Notes).

<Archive>: Character string (with quotes) or zipArchive variable

Name of archive to use.
This name can correspond to:
an archive name, defined by zipOpen or by zipCreate.
Versions 15 and later
the name of a zipArchive variable.
New in version 15
the name of a zipArchive variable.
the name of a zipArchive variable.

<Compression level>: Integer

Value included between 0 (storage without compression) and 9 (maximum compression).
The default compression level is set to 6.

Remarks

Error codes

The following error codes are returned:

15: Archive in CAB format.
27: Archive in WDZ format.
28: Invalid compression level.

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

Compression level and addition time

Caution: A high compression level means that adding a file into the archive will take longer.

Notes

The compression level is defined by the call to the function for all the files that will be added to the archive thereafter (the compression level for the files already found in the archive remains the same).

Caution: Unable to change the compression level of a file found in an existing archive.

Business / UI classification: Business Logic

Component: wd260zip.dll