Shane32/QRCoder
QRCoder
QRCoder is a QR code generator library for .NET, written entirely in managed C# with no native libraries or third-party packages. It encodes text and structured payloads into a module matrix, choosing numeric, alphanumeric, or byte packing, picking the smallest version that fits (or a version you fix), and adding Reed-Solomon error correction at one of four selectable levels. It can also produce compact Micro QR codes within each version's limits on capacity and error correction.
What sets it apart is the breadth of its payload and output options. A set of payload generators formats WiFi logins, contacts, calendar events, email, SMS, phone calls, web links, map locations, and one-time-password secrets into strings that trigger a specific action when scanned. It also builds payment requests for popular cryptocurrencies and regional bank transfer schemes. Developers can add their own payload types by implementing a common interface, or read and modify the module matrix directly to build custom renderers or analysis tools.
The same module matrix feeds separate renderer classes that output bitmaps, Base64 images, PNG or bitmap byte arrays, scalable vector graphics, XAML, PDF, PostScript, Unity textures, and plain text. An artistic image renderer supports background images and module shapes such as dots. Renderers that depend on a specific graphics system are shipped as optional add-on packages, so the core library carries no imaging dependency. Text encoding can be controlled, including forced UTF-8 and an optional byte order mark.
