DataFlex Requires Chilkat v11.7.0+

Page Numbers, Dates and the File Name in a PDF Watermark

See more PDF Watermark Examples

Demonstrates the placeholders a text watermark understands, each replaced per page as the watermark is added: {page} is the page number, {pages} the page count, {date:FORMAT} the current local date and time, and {filename} the name of the file that was loaded. Two braces give a literal brace. pageNumber.start sets what {page} is on the first page, which is how a numbering that ignores a cover is produced, and pageNumber.style formats both {page} and {pages} as decimal, romanUpper, romanLower, letterUpper or letterLower. DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoPdf
    Variant vJson
    Handle hoJson
    Variant vJsonOut
    Handle hoJsonOut
    Handle hoPdf2
    Variant vJson2
    Handle hoJson2
    String sTemp1

    Move False To iSuccess

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

    //  The PDF used in this example is available at four_pages.pdf

    Get Create (RefClass(cComChilkatPdf)) To hoPdf
    If (Not(IsComObjectCreated(hoPdf))) Begin
        Send CreateComObject of hoPdf
    End
    Get ComLoadFile Of hoPdf "qa_data/pdf/four_pages.pdf" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPdf To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    Get ComUpdateString Of hoJson "type" "text" To iSuccess
    Get ComUpdateString Of hoJson "text" "Page {page} of {pages}  -  printed {date:yyyy-MM-dd HH:mm}  -  {filename}" To iSuccess
    Get ComUpdateString Of hoJson "id" "pagefoot" To iSuccess
    Get ComUpdateString Of hoJson "position.align" "bottom" To iSuccess
    Get ComUpdateNumber Of hoJson "position.margin" "24" To iSuccess
    Get ComUpdateNumber Of hoJson "font.size" "9" To iSuccess
    Get ComUpdateString Of hoJson "color" "#505050" To iSuccess

    Get Create (RefClass(cComChilkatJsonObject)) To hoJsonOut
    If (Not(IsComObjectCreated(hoJsonOut))) Begin
        Send CreateComObject of hoJsonOut
    End
    Get pvComObject of hoJson to vJson
    Get pvComObject of hoJsonOut to vJsonOut
    Get ComWatermark Of hoPdf "add" vJson vJsonOut To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPdf To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComStringOf Of hoJsonOut "pages" To sTemp1
    Showln "footer pages: " sTemp1

    //  Roman numerals that start at i on page 2, so that a cover page is not numbered.
    Get Create (RefClass(cComChilkatPdf)) To hoPdf2
    If (Not(IsComObjectCreated(hoPdf2))) Begin
        Send CreateComObject of hoPdf2
    End
    Get ComLoadFile Of hoPdf2 "qa_data/pdf/four_pages.pdf" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPdf2 To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatJsonObject)) To hoJson2
    If (Not(IsComObjectCreated(hoJson2))) Begin
        Send CreateComObject of hoJson2
    End
    Get ComUpdateString Of hoJson2 "type" "text" To iSuccess
    Get ComUpdateString Of hoJson2 "text" "- {page} -" To iSuccess
    Get ComUpdateString Of hoJson2 "id" "roman" To iSuccess
    Get ComUpdateString Of hoJson2 "pages" "2-" To iSuccess
    Get ComUpdateInt Of hoJson2 "pageNumber.start" 1 To iSuccess
    Get ComUpdateString Of hoJson2 "pageNumber.style" "romanLower" To iSuccess
    Get ComUpdateString Of hoJson2 "position.align" "bottom" To iSuccess
    Get ComUpdateNumber Of hoJson2 "font.size" "10" To iSuccess
    Get pvComObject of hoJson2 to vJson2
    Get pvComObject of hoJsonOut to vJsonOut
    Get ComWatermark Of hoPdf2 "add" vJson2 vJsonOut To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPdf2 To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComStringOf Of hoJsonOut "pages" To sTemp1
    Showln "roman pages: " sTemp1

    Get ComWriteFile Of hoPdf "qa_output/four_pages_numbered.pdf" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPdf To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Sample output:

    //  footer pages: 1-4
    //  roman pages: 2-4


End_Procedure