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DataFlex Examples

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(DataFlex) Replace/Update a FIle in a .zip

Demonstrates how to replace/update a file from a .zip. Note: This requires the entire .zip to be rewritten.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoZip
    Boolean iSuccess
    Variant vEntry
    Handle hoEntry
2    Handle hoZip2

    //  This requires the Chilkat Zip API to have been previously unlocked.
    //  See Unlock Chilkat Zip for sample code.

    //  First prepare a .zip and write it..
    Get Create (RefClass(cComChilkatZip)) To hoZip
    If (Not(IsComObjectCreated(hoZip))) Begin
        Send CreateComObject of hoZip
    End

    Get ComNewZip Of hoZip "qa_output/abc.zip" To iSuccess

    //  Add some files..
    Get ComAppendString Of hoZip "a.txt" "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" To vEntry
    If (IsComObject(vEntry)) Begin
        Get Create (RefClass(cComChilkatZipEntry)) To hoEntry
        Set pvComObject Of hoEntry To vEntry
    End
    Send Destroy of hoEntry
    Get ComAppendString Of hoZip "b.txt" "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb" To vEntry
    If (IsComObject(vEntry)) Begin
        Get Create (RefClass(cComChilkatZipEntry)) To hoEntry
        Set pvComObject Of hoEntry To vEntry
    End
    Send Destroy of hoEntry
    Get ComAppendString Of hoZip "c.txt" "cccccccccccccccccccccccccccccccccccc" To vEntry
    If (IsComObject(vEntry)) Begin
        Get Create (RefClass(cComChilkatZipEntry)) To hoEntry
        Set pvComObject Of hoEntry To vEntry
    End
    Send Destroy of hoEntry

    //  Write to qa_output/abc.zip
    //  This .zip contains three files: a.txt, b.txt, and c.txt
    Get ComWriteZipAndClose Of hoZip To iSuccess

    //  -------------------------------------------------------------------
    //  Open abc.zip, replace the content of the "b.txt" entry with something else, and re-write.
    Get Create (RefClass(cComChilkatZip)) To hoZip2
    If (Not(IsComObjectCreated(hoZip2))) Begin
        Send CreateComObject of hoZip2
    End
    Get ComOpenZip Of hoZip2 "qa_output/abc.zip" To iSuccess

    Get ComGetEntryByName Of hoZip2 "b.txt" To vEntry
    If (IsComObject(vEntry)) Begin
        Get Create (RefClass(cComChilkatZipEntry)) To hoEntry
        Set pvComObject Of hoEntry To vEntry
    End
    Get ComReplaceString Of hoEntry "This is the new content.  bbbbbbbbbbbbbbbbbbbbbb" "utf-8" To iSuccess
    Send Destroy of hoEntry
    //  Write the modified .zip back to "abc.zip"
    Get ComWriteZipAndClose Of hoZip2 To iSuccess

    Showln "success."


End_Procedure

 

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