C# QR Code Generator Library SDK
Integration & Developer Guide for QR Code 2D barcode image generation in C#
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Generate 2d barcode QR Code images in Visual C# .NET with complete sample C# source code

  • Generate, create QR Code in Visual C# .NET applications
  • Easy to install & integrate barcode QR Code generation library SDK into C# developments
  • Generate over 30 linear, 2d barcode images in C#.NET including C# Data Matrix, C# PDF-417, C# Interleaved 2/5, C# Code 39, C# Code 128, C# EAN
  • Generate QR Code images in C# class library
  • Create barcode QR Code in C# ASP.NET web application
  • Print QR Code barcode in C# Windows Form project
  • Draw 2d QR Code in SQL Server Reporting Services (SSRS) & Crystal Reports for .NET projects
  • Easy to encode QR Code to jpeg, gif, png, tiff, bitmap image files in C# program

C# QR-Code Generator Introduction
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Postnet, also known as USPS POSTNET Barcode, USPS POSTal Numeric Encoding Technique Barcode, is a delivery point barcodes adopted by United States Postal Services.
C# QR Code Generator is one of the functions in OnBarcode's Barcode for .NET Generation Controls, which supports generating & printing QR Code and 20+ other linear & 2D bar codes for C# applications.
OnBarcode C# Barcode Generator makes it easy to generate, create QR Code and other linear & 2d barcodes in Microsoft Word. Here are some detailed tutorials for C# QR Code generation and data encoding, size & image setting.

QR Code Generator library, SDK & application

OnBarcode provides several QR Code Generator components and software, including QR Code .NET, QR Code Java, QR Code VB.NET, QR Code ASP.NET, QR Code iPhone, QR Code iPad, QR Code Android, QR Code Generator.
This document is providing a detailed C# source code about generating QR Code barcodes in C# class using C# Barcode generation component. Complete QR Code custmoization settings is included in C# QR Code generation guide.
Create QR-Code Barcodes in C#
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Creating QR-Code barcode in C# class example:

   using System;
   using System.Collections.Generic;
   using System.Text;
   using OnBarcode.Barcode;
   using System.Drawing.Imaging;
   using System.Drawing;


   QRCode qrcode = new QRCode();

   // Barcode data to encode
   qrcode.Data = "ONBARCODE";
   // QR-Code data mode
   qrcode.DataMode = QRCodeDataMode.AlphaNumeric;
   // QR-Code format mode
   //qrcode.Version = QRCodeVersion.V10;

   /*
   * Barcode Image Related Settings
   */
   // Unit of meature for all size related setting in the library. 
   qrcode.UOM = UnitOfMeasure.PIXEL;
   // Bar module size (X), default is 3 pixel;
   qrcode.X = 3;
   // Barcode image left, right, top, bottom margins. Defaults are 0.
   qrcode.LeftMargin = 0;
   qrcode.RightMargin = 0;
   qrcode.TopMargin = 0;
   qrcode.BottomMargin = 0;
   // Image resolution in dpi, default is 72 dpi.
   qrcode.Resolution = 72;
   // Created barcode orientation.
   //4 options are: facing left, facing right, facing bottom, and facing top
   qrcode.Rotate = Rotate.Rotate0;

   // Generate QR-Code and encode barcode to gif format
   qrcode.ImageFormat = System.Drawing.Imaging.ImageFormat.Gif;
   qrcode.drawBarcode("C:\\qrcode.gif");

   /*
   You can also call other drawing methods to generate barcodes
             
   public void drawBarcode(Graphics graphics);
    
   public void drawBarcode(string filename);
    
   public Bitmap drawBarcode();
    
   public void drawBarcode(Stream stream);
             
   */
 

Generate GS1 QR Code barcode images using C#

The foundational GS1 standard that defines how identification keys, data attributes and barcodes must be used in business applications.

GS1 QR Code is a standalone, two-dimensional matrix symbology that is made up of square modules arranged in an overall square pattern, including a unique finder pattern located at three corners of the symbol.

QR Code is the only member of the QR Code family that supports GS1 system data structures, including Function 1 Symbol Character. ISO/IEC QR Code also contains specifications for Micro QR Code, but this symbology is not supported for the GS1 system. QR Code uses Reed-Solomon error correction (four selectable levels of error correction are specified), and this feature helps correct for partially damaged symbols.

GS1 QR Code symbols are read by two-dimensional imaging scanners or vision systems. Most other scanners that are not two-dimensional imagers cannot read GS1 QR Code. GS1 QR Code symbols are restricted for use with applications that will involve imaging scanners throughout the supply chain.

Sample C# source code to encode GS1 QR Code barcode

            QRCode barcode = new QRCode();

            //  It could encode GS1 element(s) by inserting a FNC1 symbol before all data characters.
            //  Each element contains a GS1 prefix (in parentheses) and fixed (or variable) length data content.
            //  Set FNC1 to FNC1.FNC1_1ST_POS to enable this feature.
            barcode.Data = "(17)050101(10)ABC123";
            barcode.FNC1 = FNC1.FNC1_1ST_POS;

            barcode.DataMode = QRCodeDataMode.Auto;

            //  Selecte format mode
            barcode.Version = QRCodeVersion.V3;

            // Barcode Size Related Settings
            barcode.UOM = UnitOfMeasure.PIXEL;
            barcode.X = 5;
            barcode.LeftMargin = 50;
            barcode.RightMargin = 50;
            barcode.TopMargin = 50;
            barcode.BottomMargin = 50;
            barcode.Resolution = 96;

            // Image format setting
            barcode.ImageFormat = System.Drawing.Imaging.ImageFormat.Png;

            barcode.drawBarcode("C://Projects//Test-Output//OnBarcode.com//csharp-qrcode-mode-gs1.png");


 

Encode Japanese (Kanji) text in QR Code using C#

Sample C# source code to encode Japanese (Kanji) text in QR Code barcode

            QRCode barcode = new QRCode();

            //  Kanji mode encodes Kanji characters defined in JIS X 0208 and valid character values are in the ranges
            //  0x8140 ~ 0x9FFC and 0xE040 ~ 0xEBBF. Each character (SJIS value) should be represented in format "~9ddddd",
            //  which "ddddd" is a decimal number in ranges 33088 (0x8140) ~ 40956 (0x9FFC) and 57408 (0xE040) ~ 60351 (0xEBBF).
            //  ProcessTilde must be enable to support this feature.
            barcode.Data = "~937727~958538";    //  0x935F0xE4AA - "点茗"
            barcode.ProcessTilde = true;

            barcode.DataMode = QRCodeDataMode.Kanji;

            //  Selecte format mode
            barcode.Version = QRCodeVersion.V1;

            // Barcode Size Related Settings
            barcode.UOM = UnitOfMeasure.PIXEL;
            barcode.X = 5;
            barcode.LeftMargin = 50;
            barcode.RightMargin = 50;
            barcode.TopMargin = 50;
            barcode.BottomMargin = 50;
            barcode.Resolution = 96;

            // Image format setting
            barcode.ImageFormat = System.Drawing.Imaging.ImageFormat.Png;

            barcode.drawBarcode("C://Projects//Test-Output//OnBarcode.com//csharp-qrcode-mode-kanji.png");


 

Create, encode Non-English text (Thai Text) in QR Code using C#

Sample C# source code to encode Thai Text in QR Code barcode

            QRCode barcode = new QRCode();

            //  It may encode any Unicode characters after converting them to bytes in UTF-8 encode.
            //  And then, use Byte encodation to encode these byte data.
            String message = "สวัสดี";
            byte[] bytes = Encoding.UTF8.GetBytes(message);
            StringBuilder sb = new StringBuilder();
            foreach (byte b in bytes)
                sb.Append("~" + b.ToString().PadLeft(3, '0'));
            barcode.Data = sb.ToString();
            barcode.ProcessTilde = true;

            barcode.DataMode = QRCodeDataMode.Byte;

            //  Selecte format mode
            barcode.Version = QRCodeVersion.V3;

            // Barcode Size Related Settings
            barcode.UOM = UnitOfMeasure.PIXEL;
            barcode.X = 5;
            barcode.LeftMargin = 50;
            barcode.RightMargin = 50;
            barcode.TopMargin = 50;
            barcode.BottomMargin = 50;
            barcode.Resolution = 96;

            // Image format setting
            barcode.ImageFormat = System.Drawing.Imaging.ImageFormat.Png;

            barcode.drawBarcode("C://Projects//Test-Output//OnBarcode.com//csharp-qrcode-mode-thai.png");


 

Generate, encode Non-printable chars in QR Code using C#

Sample C# source code to encode non printable chars '[CR]' (Carriage Return) in QR Code

            QRCode barcode = new QRCode();

            //  It could encode non-printable chars by converting char ascii value to THREE digits, in format "~ddd",
            //  Set ProcessTilde to true to enable this feature.
            barcode.Data = "~013"; // char '[CR]' or carriage return   
            barcode.ProcessTilde = true;

            barcode.DataMode = QRCodeDataMode.Auto;

            //  Selecte format mode
            barcode.Version = QRCodeVersion.V3;

            // Barcode Size Related Settings
            barcode.UOM = UnitOfMeasure.PIXEL;
            barcode.X = 5;
            barcode.LeftMargin = 50;
            barcode.RightMargin = 50;
            barcode.TopMargin = 50;
            barcode.BottomMargin = 50;
            barcode.Resolution = 96;

            // Image format setting
            barcode.ImageFormat = System.Drawing.Imaging.ImageFormat.Png;

            barcode.drawBarcode("W://Projects//Test-Output//OnBarcode.com//csharp-qrcode-mode-non-print.png");


More C# Barcode Generation Tutorials for Each Barcode
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Barcode Control for C#.NET - Bar Code Type Generation

OnBarcode is a market-leading provider of barcode imaging generator, reader controls and components for ASP.NET, Windows Forms, WPF, as well Java, Android, iOS (iPhone, iPad) across all major enterprise development platforms. We provides comprehensive tutorials and how-tos for various linear, 2d barcode information, such as C# in ASP.NET, C# .NET, C# Barcode Encoding, C# Barcode Image, VB.NET in ASP.NET, VB.NET Winforms, VB.NET Barcode Encoding, Paint QR Bar Code in Java, Print QR Code in Software. OnBarcode barcode products are supported by RasterEdge ASP.NET Document Viewer, which supports ASP.NET PDF Viewer, ASP.NET MVC Document Viewer, ASP.NET PDF Editor, MVC PDF Viewer. And provide high quality C# Convert PDF to Tiff, C# Convert PDF to Word, C# Convert PDF to HTML, C# Convert PDF to Jpeg images, and their easy and simple documents, like C# PDF SDK, C# extract text from PDF, C# Compress PDF, Print PDF in C# and C# extract image from PDF.
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