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Example for Windows Forms and System.Drawing

This example for Windows show various ways of working with QR bills. It is useful Windows Forms applications and other .NET applications running on Windows. It heavily depends on the System.Drawing classes, which have become a Windows only technology startring with .NET 6.

It is recommend to use this code example with the smaller Codecrete.SwissQRBill.Core NuGet package / assembly instead of the bigger one called Codecrete.SwissQRBill.Generator.

Useful classes are:

  • PngCanvas.cs is a canvas class generating PNG files. It is a System.Drawing-based alternative for the SkiaSharp-based PNG generation in Codecrete.SwissQRBill.Generator. To simplify it's use, use the PngCanvasFactory.
  • PngCanvasFactory.cs is a factory for PngCanvas. Call PngCanvasFactory.Register() to enable the PNG generation without the need for explicitly creating canvases.
  • BitmapCanvas.cs is a canvas class for generating System.Drawing.Bitmap instances from QR bills.
  • MetafileCanvas.cs is a canvas class for generating metafiles from QR bills.
  • QrBillControl.cs is a Windows Forms compatible control class for display a QR bill. It automatically adapts to the size of the control.

The sample Windows Forms application shows how to display a QR bill, how to print it and to copy it to the clipboard (as both a resolution-independent metafile and a bitmap).