Open source qrcode Library

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Introduction

In this article, I will briefly describe the functionalities of the qrcode library.

Background

Qrcode library is. NET component that can be used to encode and decode qrcode. qrcode is a 2 dimen1_bar code that originated in Japan. nowadays, it is widely used in a wide range of industries, e.g. for vehicle parts tracking and inventory management.

Qr stands for "Quick Response ". it was created by the Japanese corporation Denso-wave in 1994 and is aimed at decoding contents at high speed. nowadays, QR code is used in mobile phones to receive data entry.

Qrcode can also be printed on a business card or shown on any display, which can then be captured by the mobile phone provided the mobile phone has the software to read qrcode.

Qrcode Library provides functions:

1. Encode content into a QR code image which can be saved in JPEG, GIF, PNG, or bitmap formats
2. Decode a QR code Image

Using the code

The library can be used in any. NET 2.0 windows application, ASP. NET web application or windows mobile device application.

Some sample screenshots are displayed below:

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   Code 
   Qrcodeencoder  =    New  Qrcodeencoder (); string Encoding  =  Cboencoding. text;  If  (Encoding  =     "  Byte  "  ) {Qrcodeencoder. qrcodeencodemode  =  Qrcodeencoder. encode_mode.byte ;} Else     If  (Encoding  =     "  Alphanumeric  "  ) {Qrcodeencoder. qrcodeencodemode  =  Qrcodeencoder. encode_mode.alpha_numeric ;}  Else     If  (Encoding =     "  Numeric  "  ) {Qrcodeencoder. qrcodeencodemode  =  Qrcodeencoder. encode_mode.numeric ;}  Try  {  Int  Scale  =  Convert. toint16 (txtsize. Text); qrcodeencoder. qrcodescale =  Scale ;}  Catch  (Exception ex) {MessageBox. Show (  "  Invalid size!  "  );  Return  ;}  Try  {  Int  Version  = Convert. toint16 (cboversion. Text); qrcodeencoder. qrcodeversion  =  Version ;}  Catch  (Exception ex) {MessageBox. Show (  "  Invalid Version!  "  );}  String  Errorcorrect  =  Cbocorrectionlevel. text;  If (Errorcorrect  =     "  L  "  ) Qrcodeencoder. qrcodeerrorcorrect  =  Qrcodeencoder. error_correction.l;  Else     If  (Errorcorrect  =     " M  "  ) Qrcodeencoder. qrcodeerrorcorrect  =  Qrcodeencoder. error_correction.m;  Else     If  (Errorcorrect  =     "  Q  "  ) Qrcodeencoder. qrcodeerrorcorrect  = Qrcodeencoder. error_correction.q;  Else     If  (Errorcorrect  =     "  H  "  ) Qrcodeencoder. qrcodeerrorcorrect  =  Qrcodeencoder. error_correction.h; image; string data  = Txtencodedata. Text; Image  =  Qrcodeencoder. encode (data); picencode. Image  =  Image; 
 
 
 
History
 
 
 
  
  
 
   
20th September, 2007: Initial Post