DataFlex

Iterate Over ZIP Entries Using EntryAt

This example demonstrates how to use the EntryAt method to iterate over all entries contained within a ZIP archive.

The EntryAt method retrieves a ZipEntry object for a given zero-based index.

This is useful for:

• Enumerating all entries in a ZIP archive
• Inspecting filenames, sizes, and timestamps
• Searching or filtering ZIP contents

Suppose the ZIP archive contains:

docs/readme.txt
images/logo.png
data/config.json

The example loops through all ZIP entries and prints information about each entry.

DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoZip
    Integer iNumEntries
    Variant vEntry
    Handle hoEntry
    Integer i
    String sTemp1
    Integer iTemp1

    Move False To iSuccess

    Move False To iSuccess

    // Open an existing ZIP archive.
    Get Create (RefClass(cComChilkatZip)) To hoZip
    If (Not(IsComObjectCreated(hoZip))) Begin
        Send CreateComObject of hoZip
    End

    Get ComOpenZip Of hoZip "example.zip" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoZip To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Get the total number of entries in the ZIP archive.
    Get ComNumEntries Of hoZip To iNumEntries

    Showln "Number of ZIP entries = " iNumEntries

    // Create a ZipEntry object that will be reused
    // for each entry retrieved by EntryAt.
    Get Create (RefClass(cComChilkatZipEntry)) To hoEntry
    If (Not(IsComObjectCreated(hoEntry))) Begin
        Send CreateComObject of hoEntry
    End

    // Iterate over all ZIP entries.
    Move 0 To i
    While (i < iNumEntries)

        // Retrieve the entry at index i.
        Get pvComObject of hoEntry to vEntry
        Get ComEntryAt Of hoZip i vEntry To iSuccess
        If (iSuccess = False) Begin
            Get ComLastErrorText Of hoZip To sTemp1
            Showln sTemp1
            Procedure_Return
        End

        Showln "Entry " i
        Get ComFileName Of hoEntry To sTemp1
        Showln "  FileName: " sTemp1
        Get ComUncompressedLength Of hoEntry To iTemp1
        Showln "  Uncompressed Length: " iTemp1
        Get ComCompressedLength Of hoEntry To iTemp1
        Showln "  Compressed Length: " iTemp1
        Showln ""

        Move (i + 1) To i
    Loop

    // Sample output:
    // 
    // Entry 0
    //   FileName: docs/readme.txt
    //   Uncompressed Length: 1204
    //   Compressed Length: 512
    // 
    // Entry 1
    //   FileName: images/logo.png
    //   Uncompressed Length: 84211
    //   Compressed Length: 84102
    // 

    Send ComCloseZip To hoZip

    Showln "Done."


End_Procedure