(Lianja) Iterate Through ZIP Entries Using EntryAt and ZipEntry.GetNext

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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.

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llSuccess = .F.

loZip = createobject("CkZip")

// Open an existing ZIP archive.
llSuccess = loZip.OpenZip("c:/temp/example.zip")
if (llSuccess = .F.) then
    ? loZip.LastErrorText
    release loZip
    return
endif

// A ZIP archive may contain zero entries.
if (loZip.NumEntries = 0) then

    ? "The ZIP archive is empty."

    loZip.CloseZip()
    release loZip
    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.
// 
loEntry = createobject("CkZipEntry")

llSuccess = loZip.EntryAt(0,loEntry)
if (llSuccess = .F.) then
    ? loZip.LastErrorText
    release loZip
    release loEntry
    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 (llSuccess = .T.)

    if (loEntry.IsDirectory = .T.) then

        ? "[Directory] " + loEntry.FileName

    else

        ? "[File] " + loEntry.FileName
    endif

    // Advance to the next entry.
    llSuccess = loEntry.GetNext()
enddo

loZip.CloseZip()

? "Done."


release loZip
release loEntry