DrawBarcodeQrCode(String,BarcodeQREncodingMode,BarcodeQRErrorCorrectionLevel,Int32,Int32,Single,Single,GdPictureColor) Method

In This Topic

Draws a required QR Code onto the currently selected page of the loaded PDF document according to your preference.

This method uses the RGB color space internally when manipulating with the symbol's fill color you have specified.

The coordinates and the dimensions of the QR Code symbol need to be set in the current units with respect to the currently located origin defined in the PDF document, related to the actual page, where the symbol is to be drawn. You can use the GdPicturePDF.GetMeasurementUnit method to determine the currently defined units and you can use the GdPicturePDF.SetMeasurementUnit method to reset the units according to your preference.

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Overloads Function DrawBarcodeQrCode( _
   ByVal Data As String, _
   ByVal EncodingMode As BarcodeQREncodingMode, _
   ByVal ErrorCorrectionLevel As BarcodeQRErrorCorrectionLevel, _
   ByVal Version As Integer, _
   ByVal ModuleSize As Integer, _
   ByVal DstX As Single, _
   ByVal DstY As Single, _
   ByVal FillColor As GdPictureColor _
) As GdPictureStatus

public GdPictureStatus DrawBarcodeQrCode( 
   string Data,
   BarcodeQREncodingMode EncodingMode,
   BarcodeQRErrorCorrectionLevel ErrorCorrectionLevel,
   int Version,
   int ModuleSize,
   float DstX,
   float DstY,
   GdPictureColor FillColor
)

public function DrawBarcodeQrCode( 
    Data: String;
    EncodingMode: BarcodeQREncodingMode;
    ErrorCorrectionLevel: BarcodeQRErrorCorrectionLevel;
    Version: Integer;
    ModuleSize: Integer;
    DstX: Single;
    DstY: Single;
    FillColor: GdPictureColor
): GdPictureStatus;

public function DrawBarcodeQrCode( 
   Data : String,
   EncodingMode : BarcodeQREncodingMode,
   ErrorCorrectionLevel : BarcodeQRErrorCorrectionLevel,
   Version : int,
   ModuleSize : int,
   DstX : float,
   DstY : float,
   FillColor : GdPictureColor
) : GdPictureStatus;

public: GdPictureStatus DrawBarcodeQrCode( 
   string* Data,
   BarcodeQREncodingMode EncodingMode,
   BarcodeQRErrorCorrectionLevel ErrorCorrectionLevel,
   int Version,
   int ModuleSize,
   float DstX,
   float DstY,
   GdPictureColor FillColor
)

public:
GdPictureStatus DrawBarcodeQrCode( 
   String^ Data,
   BarcodeQREncodingMode EncodingMode,
   BarcodeQRErrorCorrectionLevel ErrorCorrectionLevel,
   int Version,
   int ModuleSize,
   float DstX,
   float DstY,
   GdPictureColor FillColor
)

Parameters

Data

The data to encode using the required QR Code symbol.

EncodingMode

A member of the BarcodeQREncodingMode enumeration. The QR Code encoding mode.

ErrorCorrectionLevel

A member of the BarcodeQRErrorCorrectionLevel enumeration. The error correction level.

These levels are defined in terms of percentage of codewords in the barcode that can be corrected if damaged. The higher the level, the greater the error correction, but also the larger the QR Code version.

Version

The version of the QR Code, it specifies the overall dimensions of the symbol.

QR Codes can be generated in 40 different symbol versions, from 21 x 21 modules (version 1) to 177 x 177 modules (version 40), therefore the range for this parameter is 0 - 40. You can use 0 to let the engine decide the minimum version required to encode all specified data.

ModuleSize

The size of each module within the drawn symbol, in points.

The module is the smallest cell in the symbol. The module size has to be made out of at least 2×2 printed dots for bigger reliability, therefore the recommended value for this parameter is 4 and greater.

Specifically for QR Codes, the larger the module is, the more stable and easier to read with a QR Code scanner it becomes. On the other hand, as the QR Code symbol size gets larger, a larger printing area is required.

DstX

The horizontal (X) coordinate of the destination point, expressed in the current units specified by the SetMeasurementUnit method with respect to the defined origin, related to the currently selected page.

DstY

The vertical (Y) coordinate of the destination point, expressed in the current units specified by the SetMeasurementUnit method with respect to the defined origin, related to the currently selected page.

FillColor

A color object that defines the color to be used for drawing the required symbol.

Return Value

A member of the GdPictureStatus enumeration. If the method has been successfully followed, then the return value is GdPictureStatus.OK.

We strongly recommend always checking this status first.

Remarks

This method is only allowed for use with non-encrypted documents.

Just to remind you that 1 point is equivalent to 1/72 of an inch.

This method requires the Barcode Reading & Writing component to run.

Example

How to draw various QR barcodes onto the newly created page of the new PDF document.

VB.NET
C#

Dim caption As String = "Example: DrawBarcodeQrCode"
Dim gdpicturePDF As New GdPicturePDF()
Dim status As GdPictureStatus = gdpicturePDF.NewPDF()
If status = GdPictureStatus.OK Then
    gdpicturePDF.SetOrigin(PdfOrigin.PdfOriginTopLeft)
    gdpicturePDF.SetMeasurementUnit(PdfMeasurementUnit.PdfMeasurementUnitCentimeter)
    status = gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeLetter)
    If status = GdPictureStatus.OK Then
        If (gdpicturePDF.DrawBarcodeQrCode("0123456789", BarcodeQREncodingMode.BarcodeQREncodingModeAlphaNumeric, BarcodeQRErrorCorrectionLevel.BarcodeQRErrorCorrectionLevelM,
                                            0, 2, 2, 2, Color.Orange) = GdPictureStatus.OK) AndAlso
           (gdpicturePDF.DrawBarcodeQrCode("0123456789", BarcodeQREncodingMode.BarcodeQREncodingModeAlphaNumeric, BarcodeQRErrorCorrectionLevel.BarcodeQRErrorCorrectionLevelM,
                                            0, 4, 6, 2, Color.OrangeRed) = GdPictureStatus.OK) AndAlso
           (gdpicturePDF.DrawBarcodeQrCode("0123456789", BarcodeQREncodingMode.BarcodeQREncodingModeAlphaNumeric, BarcodeQRErrorCorrectionLevel.BarcodeQRErrorCorrectionLevelM,
                                            0, 8, 12, 2, Color.Orchid) = GdPictureStatus.OK) AndAlso
           (gdpicturePDF.DrawBarcodeQrCode("9876543210", BarcodeQREncodingMode.BarcodeQREncodingModeAlphaNumeric, BarcodeQRErrorCorrectionLevel.BarcodeQRErrorCorrectionLevelL,
                                            0, 2, 2, 10, Color.Blue) = GdPictureStatus.OK) AndAlso
           (gdpicturePDF.DrawBarcodeQrCode("9876543210", BarcodeQREncodingMode.BarcodeQREncodingModeAlphaNumeric, BarcodeQRErrorCorrectionLevel.BarcodeQRErrorCorrectionLevelL,
                                            0, 4, 6, 10, Color.BlueViolet) = GdPictureStatus.OK) AndAlso
           (gdpicturePDF.DrawBarcodeQrCode("9876543210", BarcodeQREncodingMode.BarcodeQREncodingModeAlphaNumeric, BarcodeQRErrorCorrectionLevel.BarcodeQRErrorCorrectionLevelL,
                                            0, 8, 12, 10, Color.CadetBlue) = GdPictureStatus.OK) Then
            status = gdpicturePDF.SaveToFile("test_DrawBarcodeQrCode.pdf")
            If status = GdPictureStatus.OK Then
                MessageBox.Show("The example has been followed successfully and the file has been saved.", caption)
            Else
                MessageBox.Show("The example has been followed successfully, but the file can't be saved. Status: " + status.ToString(), caption)
            End If
        Else
            MessageBox.Show("The one of the DrawBarcodeQrCode() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)
        End If
    Else
        MessageBox.Show("The NewPage() method has failed with the status: " + status.ToString(), caption)
    End If
Else
    MessageBox.Show("The NewPDF() method has failed with the status: " + status.ToString(), caption)
End If
gdpicturePDF.Dispose()

string caption = "Example: DrawBarcodeQrCode";
GdPicturePDF gdpicturePDF = new GdPicturePDF();
GdPictureStatus status = gdpicturePDF.NewPDF();
if (status == GdPictureStatus.OK)
{
    gdpicturePDF.SetOrigin(PdfOrigin.PdfOriginTopLeft);
    gdpicturePDF.SetMeasurementUnit(PdfMeasurementUnit.PdfMeasurementUnitCentimeter);
    status = gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeLetter);
    if (status == GdPictureStatus.OK)
    {
        if ((gdpicturePDF.DrawBarcodeQrCode("0123456789", BarcodeQREncodingMode.BarcodeQREncodingModeAlphaNumeric, BarcodeQRErrorCorrectionLevel.BarcodeQRErrorCorrectionLevelM,
                                             0, 2, 2, 2, Color.Orange) == GdPictureStatus.OK) &&
            (gdpicturePDF.DrawBarcodeQrCode("0123456789", BarcodeQREncodingMode.BarcodeQREncodingModeAlphaNumeric, BarcodeQRErrorCorrectionLevel.BarcodeQRErrorCorrectionLevelM,
                                             0, 4, 6, 2, Color.OrangeRed) == GdPictureStatus.OK) &&
            (gdpicturePDF.DrawBarcodeQrCode("0123456789", BarcodeQREncodingMode.BarcodeQREncodingModeAlphaNumeric, BarcodeQRErrorCorrectionLevel.BarcodeQRErrorCorrectionLevelM,
                                             0, 8, 12, 2, Color.Orchid) == GdPictureStatus.OK) &&
            (gdpicturePDF.DrawBarcodeQrCode("9876543210", BarcodeQREncodingMode.BarcodeQREncodingModeAlphaNumeric, BarcodeQRErrorCorrectionLevel.BarcodeQRErrorCorrectionLevelL,
                                             0, 2, 2, 10, Color.Blue) == GdPictureStatus.OK) &&
            (gdpicturePDF.DrawBarcodeQrCode("9876543210", BarcodeQREncodingMode.BarcodeQREncodingModeAlphaNumeric, BarcodeQRErrorCorrectionLevel.BarcodeQRErrorCorrectionLevelL,
                                             0, 4, 6, 10, Color.BlueViolet) == GdPictureStatus.OK) &&
            (gdpicturePDF.DrawBarcodeQrCode("9876543210", BarcodeQREncodingMode.BarcodeQREncodingModeAlphaNumeric, BarcodeQRErrorCorrectionLevel.BarcodeQRErrorCorrectionLevelL,
                                             0, 8, 12, 10, Color.CadetBlue) == GdPictureStatus.OK))
        {
            status = gdpicturePDF.SaveToFile("test_DrawBarcodeQrCode.pdf");
            if (status == GdPictureStatus.OK)
                MessageBox.Show("The example has been followed successfully and the file has been saved.", caption);
            else
                MessageBox.Show("The example has been followed successfully, but the file can't be saved. Status: " + status.ToString(), caption);
        }
        else
            MessageBox.Show("The one of the DrawBarcodeQrCode() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);
    }
    else
        MessageBox.Show("The NewPage() method has failed with the status: " + status.ToString(), caption);
}
else
    MessageBox.Show("The NewPDF() method has failed with the status: " + status.ToString(), caption);
gdpicturePDF.Dispose();

Reference

GdPicturePDF Class
GdPicturePDF Members
Overload List
SetMeasurementUnit Method
SetOrigin Method
GetMeasurementUnit Method
GetOrigin Method
DrawBarcode1D(Barcode1DWriterType,String,Single,Single,Single,Single,Byte,Byte,Byte) Method
DrawBarcodeAztec(String,BarcodeAztecCodeVersion,Int32,Int32,Int32,Single,Single,Byte,Byte,Byte) Method
DrawBarcodeDataMatrix(String,BarcodeDataMatrixEncodingMode,BarcodeDataMatrixVersion,Int32,Single,Single,Byte,Byte,Byte) Method
DrawBarcodeMicroMicroQrCode(String,BarcodeQREncodingMode,BarcodeMicroQRErrorCorrectionLevel,Int32,Int32,Single,Single,GdPictureColor) Method
DrawBarcodePDF417(String,BarcodePDF417EncodingMode,BarcodePDF417ErrorCorrectionLevel,Int32,Int32,Int32,Int32,Single,Single,Byte,Byte,Byte) Method