Xbase++

Iterate Through ZIP Entries Using EntryAt and ZipEntry.GetNext

See more Zip Examples

This example demonstrates how to iterate through all entries in a ZIP archive using:

• Zip.EntryAt to obtain the first entry
• ZipEntry.GetNext to advance through the remaining entries

The example prints each ZIP entry's stored filename and whether the entry is a file or directory.

This approach is useful when sequentially processing ZIP entries without repeatedly calling EntryAt by index.

Suppose the ZIP archive contains:

docs/
docs/readme.txt
images/logo.png
hello.txt

The example iterates through each entry in the order stored within the ZIP archive.

Xbase++

LOCAL nSuccess
LOCAL oZip
LOCAL oEntry

nSuccess := 0

oZip := CreateObject("Chilkat.Zip")

//  Open an existing ZIP archive.
nSuccess := oZip:OpenZip("c:/temp/example.zip")
IF (nSuccess == 0)
    ? oZip:LastErrorText
    oZip:destroy()
    RETURN
ENDIF

//  A ZIP archive may contain zero entries.
IF (oZip:NumEntries == 0)

    ? "The ZIP archive is empty."

    oZip:CloseZip()
    oZip:destroy()
    RETURN
ENDIF

//  ------------------------------------------------------------
//  Get the first ZIP entry.
//  
//  EntryAt(0,entry) initializes the ZipEntry object so that
//  it represents the first entry in the ZIP archive.
//  
oEntry := CreateObject("Chilkat.ZipEntry")

nSuccess := oZip:EntryAt(0, oEntry)
IF (nSuccess == 0)
    ? oZip:LastErrorText
    oZip:destroy()
    oEntry:destroy()
    RETURN
ENDIF

//  ------------------------------------------------------------
//  Iterate through all ZIP entries.
//  
//  GetNext updates the same ZipEntry object so that it
//  represents the next entry in the ZIP archive.
//  
DO WHILE (nSuccess == 1)

    IF (oEntry:IsDirectory == 1)

        ? "[Directory] " + oEntry:FileName

    ELSE

        ? "[File] " + oEntry:FileName
    ENDIF

    //  Advance to the next entry.
    nSuccess := oEntry:GetNext()
ENDDO

oZip:CloseZip()

? "Done."

oZip:destroy()
oEntry:destroy()