Generate Micro QR codes in C# .NET

Nutrient .NET SDK (formerly GdPicture.NET) enables you to generate one-dimensional (1D or linear) and two-dimensional (2D) barcodes.

Nutrient .NET SDK supports all 1D barcode formats and the following 2D barcode formats:

• Aztec Code
• Data Matrix
• MaxiCode
• Micro QR
• PDF417
• QR

To generate a Micro QR barcode, follow the steps below:

1. Create a GdPictureImaging object.
2. Set the encoding mode of the barcode with the BarcodeQREncodingMode enumeration, and store it in a variable. Use BarcodeQREncodingModeUndefined to let the engine determine the most appropriate encoding mode for the input data.
3. Set the error correction level with the BarcodeMicroQRErrorCorrectionLevel enumeration, and store it in a variable.
4. Compute the size of the barcode with the BarcodeMicroQRGetSize method of the GdPictureImaging object, and store it in a variable. This method takes the following parameters:
   • The data encoded in the barcode.
   • The encoding mode.
   • The error correction level.
   • An output parameter that defines the version of the barcode.
   • The number of modules considered quiet zone around the barcode. The recommended value is 4 or more.
   • The size of each module in pixels. The recommended value is 4 or more.
5. Create an empty GdPicture image with the CreateNewGdPictureImage method of the GdPictureImaging object. This method takes the following parameters:
   • The width of the image in pixels.
   • The height of the image in pixels.
   • The bit depth of the image.
   • The background color of the image. Use the ARGB method of the GdPictureImaging object to specify the color with the ARGB standard. For example, for a white background, set gdpictureImaging.ARGB(255, 255, 255).
6. Write the barcode to the empty image with the BarcodeMicroQRWrite method of the GdPictureImaging object. This method takes the following parameters:
   • The image ID of the newly created image.
   • The data encoded in the barcode.
   • The encoding mode.
   • The error correction level.
   • The version of the barcode.
   • The number of modules considered quiet zone around the barcode. The recommended value is 4 or more.
   • The size of each module in pixels. The recommended value is 4 or more.
   • The distance between the left side of the image and the barcode in pixels.
   • The distance between the top side of the image and the barcode in pixels.
   • The angle of the barcode.
   • The color of the symbols on the barcode. Use the ARGB method of the GdPictureImaging object to specify the color with the ARGB standard. For example, for black, set gdpictureImaging.ARGB(0, 0, 0).
   • The background color of the barcode. Use the ARGB method of the GdPictureImaging object to specify the color with the ARGB standard. For example, for white, set gdpictureImaging.ARGB(255, 255, 255).
7. Save the image as a PNG file with the SaveAsPNG method of the GdPictureImaging object.
8. Release unnecessary resources.

The example below generates a Micro QR barcode:

using GdPictureImaging gdpictureImaging = new GdPictureImaging();
// Set the encoding mode of the barcode.
BarcodeQREncodingMode encodingMode = BarcodeQREncodingMode.BarcodeQREncodingModeUndefined;
// Set the error correction level.
BarcodeMicroQRErrorCorrectionLevel errorCorrectionLevel = BarcodeMicroQRErrorCorrectionLevel.BarcodeMicroQRErrorCorrectionLevelM;
// Compute the size of the barcode.
int size = gdpictureImaging.BarcodeMicroQRGetSize("0123456789", encodingMode, errorCorrectionLevel, out int version, 4, 8);
// Create an empty GdPicture image.
int imageID = gdpictureImaging.CreateNewGdPictureImage(size, size, 32, gdpictureImaging.ARGB(255, 255, 255));
// Write the barcode to the empty image.
gdpictureImaging.BarcodeMicroQRWrite(imageID, "0123456789", encodingMode, errorCorrectionLevel, version, 4, 8, 0, 0, 0, gdpictureImaging.ARGB(0, 0, 0), gdpictureImaging.ARGB(255, 255, 255));
// Save the image as a PNG file.
gdpictureImaging.SaveAsPNG(imageID, @"C:\temp\output.png");
// Release unnecessary resources.
gdpictureImaging.ReleaseGdPictureImage(imageID);

Using gdpictureImaging As GdPictureImaging = New GdPictureImaging()
    ' Set the encoding mode of the barcode.
    Dim encodingMode As BarcodeQREncodingMode = BarcodeQREncodingMode.BarcodeQREncodingModeUndefined
    ' Set the error correction level.
    Dim errorCorrectionLevel As BarcodeMicroQRErrorCorrectionLevel = BarcodeMicroQRErrorCorrectionLevel.BarcodeMicroQRErrorCorrectionLevelM
    ' Compute the size of the barcode.
    Dim version As Integer = Nothing
    Dim size As Integer = gdpictureImaging.BarcodeMicroQRGetSize("0123456789", encodingMode, errorCorrectionLevel, version, 4, 8)
    ' Create an empty GdPicture image.
    Dim imageID As Integer = gdpictureImaging.CreateNewGdPictureImage(size, size, 32, gdpictureImaging.ARGB(255, 255, 255))
    ' Write the barcode to the empty image.
    gdpictureImaging.BarcodeMicroQRWrite(imageID, "0123456789", encodingMode, errorCorrectionLevel, version, 4, 8, 0, 0, 0, gdpictureImaging.ARGB(0, 0, 0), gdpictureImaging.ARGB(255, 255, 255))
    ' Save the image as a PNG file.
    gdpictureImaging.SaveAsPNG(imageID, "C:\temp\output.png")
    ' Release unnecessary resources.
    gdpictureImaging.ReleaseGdPictureImage(imageID)
End Using