George Mamaladze

.NET C# tips, tricks, tweaks. Effective use of data structures and algorithms. Clean code.
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Just launched another open source project QrCode.Net at qrcodenet.codeplex.com

 Download binaries and application – 32K
 Source code – 99K

 

Background

Recently I was looking for a .NET implementation of QR code generator. Most of components either use online services to generate and/or recognize QR code or the implementation was not “good enough” for my purposes. The most popular and very powerful Java implementation comes from google’s open source project code.google.com/p/zxing called ZXing (Zebra Crossing => Z=Zebra + X=Cross + ing).

There I found a one-to-one c# port of earlier version. The project is focusing on additional features and further development in Java so it seems that no one is taking care of c# branch.

Thus I have decided to set-up this project QRCode.Net  qrcodenet.codeplex.com.

As a start point I took a straight forward c# port of google’s QR code implementation from ZXing project.
I wrote a wrapper around and a demo application which is able to generate QR code from text as you type and save it to file.

In addition it contains a very naive and simple implementation of Artistic QR code generation. At the highest error correction level it is possible to create artistic QR codes that still scan correctly, but contain intentional errors to make them more readable or attractive to the human eye, as well as to incorporate colors, logos and other features into the QR code block.

Project TODOs and Plans

I think this project would be a good playground for:

  1. Understanding QR code form inside
  2. Designing and implementing efficient and elegant data structures and algorithms. I have looked at the ZXing codebase, especially encoding. The code is good, but there are still many things ti improve. Furthermore the automated Java to c# converter produced a lot of mess.
  3. Refactoring and rewriting code in a TDD manner – existing implementation can be used as an excellent refactoring initial point. In some cases I think I would prefer to rewrite and use old classes a reference implementations and run my test again both the old and the new code.

Print | posted on Thursday, September 22, 2011 6:13 AM | Filed Under [ C# Language Coding ]

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