.NET QR-Code Generator for .NET, ASP.NET, C#, VB.NET

The symbol versions of QR Code range from Version 1 to Version 40. Each version has a different module configuration or number of modules (the module refers to the black and white dots that make up QR Code). "Module configuration" refers to the number of modules contained in a symbol, commencing with Version 1 (21 x 21 modules) up to Version 40 (177 x 177 modules). Each higher version number comprises 4 additional modules per side. Each QR Code symbol version has the maximum data capacity according to the amount of data, character type and error correction level. In other words, as the amount of data increases, more modules are required to comprise QR Code, resulting in larger QR Code symbols.

QR Code has error correction capability to restore data if the code is dirty or damaged. Four error correction levels are available for users to choose according to the operating environment. Raising this level improves error correction capability but also increases the amount of data QR Code size. To select error correction level, various factors such as the operating environment and QR Code size need to be considered. Level Q or H may be selected for factory environment where QR Code gets dirty, whereas Level L may be selected for clean environment with the large amount of data. Typically, Level M (15%) is most frequently selected. The QR Code error correction feature is implemented by adding a Reed-Solomon Code to the original data.

QR Code is a matrix symbology with the following characteristics:

Formats: QR Code, with full range of capabilities and maximum data capacity;
Encodable character set:

numeric data (digits 0 - 9);
alphanumeric data (digits 0 - 9; upper case letters A -Z; nine other characters: space, $ % * + - . / : );
byte data (default: ISO/IEC 8859-1);
Kanji characters.

Version (Symbol size) (not including quiet zone): 21 x 21 modules to 177 x 177 modules (Versions 1 to 40, increasing in steps of four modules per side).
Maximum QR Code symbol size, Version 40-L:

numeric data: 7089 characters
alphanumeric data: 4296 characters
Byte data: 2953 characters
Kanji data: 1817 characters

Selectable error correction level:
Four levels of Reed-Solomon error correction (referred to as L, M, Q and H in increasing order of capacity) allowing recovery of:

L 7% of the symbol codewords
M 15% of the symbol codewords
Q 25% of the symbol codewords
H 30% of the symbol codewords

Structured Append: This allows files of data to be represented logically and continuously in up to 16 QR Code symbols.These may be scanned in any sequence to enable the original data to be correctly reconstructed.
Extended Channel Interpretations: This mechanism enables data using character sets other than the default encodable set (e.g. Arabic,Cyrillic, Greek) and other data interpretations (e.g. compacted data using defined compression schemes)or other industry-specific requirements to be encoded.
FNC1 Mode: FNC1 mode is used for messages containing specific data formats. In the "1st position" it designates data formatted in accordance with the GS1 General Specifications. In the "2nd position" it designates data formatted in accordance with a specific industry application previously agreed with AIM Inc. FNC1 mode applies to the entire symbol and is not affected by subsequent mode indicators.

QRCode Barcode for .NET, ASP.NET supports:

numeric data (digits 0 - 9);
alphanumeric data (digits 0 - 9; upper case letters A -Z; nine other characters: space, $ % * + - . / : );
byte data (default: ISO/IEC 8859-1);
Kanji characters.

     BarcodeLib.Barcode.QRCode barcode = new BarcodeLib.Barcode.QRCode();
     barcode.Data = "123456789012";

     barcode.ModuleSize = 3;
     barcode.LeftMargin = 0;
     barcode.RightMargin = 0;
     barcode.TopMargin = 0;
     barcode.BottomMargin = 0;

     barcode.Encoding = BarcodeLib.Barcode.QRCodeEncoding.Auto;
     barcode.Version = BarcodeLib.Barcode.QRCodeVersion.V1;
     barcode.ECL = BarcodeLib.Barcode.QRCodeErrorCorrectionLevel.L;
     barcode.ImageFormat = System.Drawing.Imaging.ImageFormat.Png;

     // more barcode settings here

     // save barcode image into your system
     barcode.drawBarcode("c://barcode.png");
    
     // generate barcode & output to byte array
     byte[] barcodeInBytes = barcode.drawBarcodeAsBytes();
    
     // generate barcode to Graphics object
     Graphics graphics = ...;
     barcode.drawBarcode(graphics);
    
     // generate barcode and output to HttpResponse object
     HttpResponse response = ...;
     barcode.drawBarcode(response);
    
     // generate barcode and output to Stream object
     Stream stream = ...;
     barcode.drawBarcode(stream);