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


QR-Code is also known as Denso Barcode, QRCode, Quick Response Code, JIS X 0510, ISO/IEC18004


Quick Navigate
  1. .NET QR-Code Introduction
  2. .NET QR-Code Basic Characteristics
  3. .NET QR-Code Encoding Data Scope
  4. How to Generate Barcode Image in IIS without Visual Studio .NET?
  5. How to Generate Barcode Image through Web Controller in ASP.NET?
  6. How to Generate Barcode Image through Windows Controller in .NET?
  7. How to Generate Barcode Image in .NET class?
  8. How to Save Barcode Image?
  9. .NET QR-Code Property Settings

 
1. .NET QR-Code Barcode Introduction
QR Code is a kind of 2-D (two-dimensional) symbology developed by Denso Wave (a division of Denso Corporation at the time) and released in 1994 with the primary aim of being a symbol that is easily interpreted by scanner equipment.

QR Code is capable of handling all types of data, such as numeric and alphabetic characters, Kanji, Kana, Hiragana, symbols, binary, and control codes.

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.


 
2. .NET QR-Code Basic Characteristics
QR Code is a matrix symbology with the following characteristics:
  1. Formats: QR Code, with full range of capabilities and maximum data capacity;
  2. 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.
  3. 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).
  4. Maximum QR Code symbol size, Version 40-L:
    • numeric data: 7089 characters
    • alphanumeric data: 4296 characters
    • Byte data: 2953 characters
    • Kanji data: 1817 characters
  5. 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%
    • M 15%
    • Q 25%
    • H 30%
    of the symbol codewords.
  6. 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.
  7. 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.
  8. 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.


 
3. .NET QR-Code Encoding Data Scope
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.


 
4. How to Generate QR Code Barcode Image in IIS without Visual Studio .NET?
  1. Copy folder barcode from your downloaded package, to your IIS folder, e.g. C:\Inetpub.
  2. Create a new virtual directory, named barcode.
  3. Restart IIS.
  4. Test your installation, goto http://YourDomain:port/barcode/qrcode.aspx?Data=123450
  5. To create barcode image in your ASP.NET application, you can pass the url to IMG tag src value. For example, <img src="http://YourDomain:port/barcode/qrcode.aspx?Data=123450" />


 
5. How to Generate QR Code Barcode Image through .NET Component in ASP.NET?
  1. Integrate Barcode Controller to your ASP.NET project.
    1. Copy BarcodeLib.Barcode.dll to the folder bin of your web application the barcodes are needed for.
    2. Copy qrcode.aspx file to your web application.
  2. Add barcode library to your Visual Studio Toolbox.
    1. Open Toolbox in Visual Studio. Click menu View, and check submenu Toolbox.
    2. Right click Toolbox, click menu Choose Items...
    3. Goto .NET Framework Components tab.
    4. Check component QRCode7WebForm, and its namespace is BarcodeLib.Barcode.QRCode
    5. If no component found, click Browse... button and select BarcodeLib.Barcode.dll file.
  3. Now you can see the component displayed on Toolbox. You can drag QRCodeWebForm on your aspx page, change barcode setting through properties window.


 
6. How to Generate QR Code Barcode Image through Windows Controller in .NET?
  1. Add Reference BarcodeLib.Barcode.dll to your project. Do not copy the dll to the bin directory, Visual Studio will do so, during project compilation time.
    1. In your .NET windows project, right click mouse over Refereces in your Solution Explorer window. Then click menu "Add Reference ...".
    2. Add BarcodeLib.Barcode.dll to your project.
  2. Add barcode library to your Visual Studio Toolbox.
    1. Open Toolbox in Visual Studio. Click menu View, and check submenu Toolbox.
    2. Right click Toolbox, click menu Choose Items...
    3. Goto .NET Framework Components tab.
    4. Check component QRCodeWinForm, and its namespace is BarcodeLib.Barcode.QRCode
    5. If no component found, click Browse... button and select BarcodeLib.Barcode.dll file.
  3. Now you can see the component displayed on Toolbox. You can drag QRCodeWinForm on your form, change barcode setting through properties widnow.


 
7. How to Generate QR Code Barcode Image in .NET/C#/VB.NET class?
  1. Add Reference BarcodeLib.Barcode.dll to your .NET project (ASP.NET website, Forms, any .NET project)
    In your .NET class. 
    BarcodeLib.Barcode.QRCode.QRCode barcode = BarcodeLib.Barcode.QRCode.QRCode();
barcode.Data = "your barcode data";
// other barcode settings.
                        
// save barcode image into your system
barcode.drawBarcode("c:/barcode.gif");
Above code written in C# 2005

* Please set properties UOB and Resolution, before you set any image size related properties like ModuleSize, LeftMargin.


 
8. How to Save Barcode Image?
In Windows Controller, just call method SaveAsImage(string filename). e.g. SaveAsImage("C:\barcode.gif");


 
9. .NET QR-Code Barcode Property Settings
  • Set the Data property with the value to encode. Type is string.
  • Set the BinaryData property with the binary value to encode. Type is byte[]. Once this property value is not null, barcode library will encode this value instead of property Data's value.
  • Set the Encoding property. Default is QRCodeEncoding.Auto.
    • QRCodeEncoding.Auto: It allows encoding all 256 possible 8-bit byte values. This includes all ASCII characters value from 0 to 127 inclusive and provides for international character set support
    • QRCodeEncoding.AlphaNumeric: It allows encoding alphanumeric data (digits 0 - 9; upper case letters A -Z; nine other characters: space, $ % * + - . / : ).
    • QRCodeEncoding.Byte: It allows encoding byte data (default: ISO/IEC 8859-1).
    • QRCodeEncoding.Numeric: It allows encoding numeric data (digits 0 - 9).
    • QRCodeEncoding.Kanji: It allows encoding Kanji characters.
  • Set the Version property. Default is QRCodeVersion.Auto. About Version and Symbology Size
  • Set the ECL property. QRCode Error Correction Level. Default is ErrorCorrectionLevel.L (0). About Error Correction Level
    • ErrorCorrectionLevel.L (0)
    • ErrorCorrectionLevel.M (1)
    • ErrorCorrectionLevel.Q (2)
    • ErrorCorrectionLevel.H (3)
  • QR Code can be divided into multiple data areas. Conversely, information stored in multiple QR Code symbols can be reconstructed as single data symbols. One data symbol can be divided into up to 16 symbols.
    • Set EnableStructuredAppend property to true, then Structured Append is enabled. About Structure Append
    • Set StructuredAppendCount property to the number of total symbols which make the sequence.
    • Set StructuredAppendIndex property to the position of current symbol in the secuence (Start with 1).
  • Set the FNC1Mode property. About FNC1 Mode
    • QRCodeFNC1Mode.NotSupported (0)
    • QRCodeFNC1Mode.FirstPosition (1)
    • QRCodeFNC1Mode.SecondPostion (2)
  • Set the ApplicationIndicator property. Please set this property, if property FNC1Mode value is QRCodeFNC1Mode.SecondPostion (2).
  • Set the ECI property. The type is int. Valid values are from 000000 to 999999. About Extended Channel Interpretations
  • Set the ProcessTilde property to true, if you want use the tilde character "~" to specify special characters in the input data. Default is false.
    ~NNN: is used to represent the ASCII character with the value of NNN.
  • Setting up barcode image size and style:
    • Set property UOM (Unit of Measure) for properties ModuleSize, LeftMargin, RightMargin, TopMargin and BottomMargin.
      Default is UnitOfMeasure.Pixel (0). Valid values are UnitOfMeasure.Pixel (0), UnitOfMeasure.CM (1), UnitOfMeasure.Inch (2).
    • Set the ModuleSize (for bar cell width and height). Type is float, and default is 1.
    • Set the LeftMargin, RightMargin, TopMargin and BottomMargin properties.
      Types are all float. Default are 10.
    • Set the Resolution property (Value is expressed in DPI - Dots per inch). This property is not working in Windows Controller, we will use end user's windows resultion.
    • Set the ImageFormat. Type is System.Drawing.Imaging.ImageFormat.


All .NET Barcode Symbologies:

.NET Barcode Tutorial & FAQ

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