DataFlex Requires Chilkat v11.7.0+

Generate a QR Code with the Barcode Method

See more QR Code Examples

Demonstrates the Barcode method, which is the general form of QrCode: the request names the symbology, and everything else is the same. QrCode is Barcode with the symbology already set to qr, and identical requests to the two methods give identical results. A program that will produce more than one kind of barcode can use Barcode for all of them. DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Variant vJson
    Handle hoJson
    Handle hoFmt
    Variant vJsonOut
    Handle hoJsonOut
    Variant vJson2
    Handle hoJson2
    String sTemp1
    String sTemp2
    Integer iTemp1
    Integer iTemp2

    Move False To iSuccess

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

    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    Get ComUpdateString Of hoJson "symbology" "qr" To iSuccess
    Get ComUpdateString Of hoJson "payload.text" "https://www.chilkatsoft.com/" To iSuccess
    Get ComUpdateString Of hoJson "output.path" "qa_output/qr_from_barcode.png" To iSuccess
    Get ComUpdateBool Of hoJson "output.overwrite" True To iSuccess
    Get ComUpdateString Of hoJson "output.return" "none" To iSuccess

    Get Create (RefClass(cComChilkatFormats)) To hoFmt
    If (Not(IsComObjectCreated(hoFmt))) Begin
        Send CreateComObject of hoFmt
    End
    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 ComBarcode Of hoFmt "generate" vJson vJsonOut To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoFmt To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComStringOf Of hoJsonOut "symbols[0].symbology" To sTemp1
    Showln "symbology: " sTemp1
    Get ComIntOf Of hoJsonOut "symbols[0].selectedEncoding.version" To iTemp1
    Showln "QR version: " iTemp1
    Get ComIntOf Of hoJsonOut "outputs[0].width" To iTemp1
    Get ComIntOf Of hoJsonOut "outputs[0].height" To iTemp2
    Showln "image: " iTemp1 " x " iTemp2 " pixels"

    //  The image written to qa_output/qr_from_barcode.png:

    //  

    //  Barcode requires the symbology.  QrCode does not.
    Get Create (RefClass(cComChilkatJsonObject)) To hoJson2
    If (Not(IsComObjectCreated(hoJson2))) Begin
        Send CreateComObject of hoJson2
    End
    Get ComUpdateString Of hoJson2 "payload.text" "https://www.chilkatsoft.com/" To iSuccess
    Get pvComObject of hoJson2 to vJson2
    Get pvComObject of hoJsonOut to vJsonOut
    Get ComBarcode Of hoFmt "generate" vJson2 vJsonOut To iSuccess
    If (iSuccess = False) Begin
        Get ComStringOf Of hoJsonOut "errors[0].code" To sTemp1
        Get ComStringOf Of hoJsonOut "errors[0].path" To sTemp2
        Showln "without a symbology: " sTemp1 " at " sTemp2
    End

    //  Sample output:

    //  symbology: qr
    //  QR version: 3
    //  image: 148 x 148 pixels
    //  without a symbology: missingOption at /symbology


End_Procedure