C # method of generating two-dimensional code (QR code) using qrcode.net _c# Tutorial

Now many applications on the web are using two-dimensional code to share the Web site or other information. Especially in the mobile field, two-dimensional code is a very big application scene. Because of the needs of the project, need to add a two-dimensional code analysis site in the website function, in the case of Google a large cramp in the circumstances of the helpless use of Baidu. Baidu N Many, find some items, but not strong usability. (one project is developed with VS2005, and debugging is not open in 2010.) Finally found a "artifact" on CodePlex, the "artifact" can be very convenient to generate two-dimensional code, speed that is quite fast, and can support Chinese, follow the MIT agreement.

Qrcode.net is a class library that uses C # to generate two-dimensional code pictures, which makes it easy to provide two-dimensional coded output for WinForm, WebForm, WPF, Silverlight, and Windows Phone 7 applications. You can export a two-dimensional code file to an EPS format.

The project address is: http://qrcodenet.codeplex.com

Qrcode.net no longer uses the http://code.google.com/p/zxing/ZXing port, the new version will have better performance.

The test results are as follows (microseconds):

Input string Length: 74

EC Performance 1000 tests~ qrcode.net:3929 zxing:5221

At the same time, Qrcode.net can parse the string to determine whether to use UTF-8 encoding. (for example, when using Chinese.) ）

QRCode Use Method:

New project adds a reference to the class library, and then introduces the Gma.QrCodeNet.Encoding namespace.

Using Gma.QrCodeNet.Encoding;

To output a two-dimensional code in the console:

Console.Write (@ "Type some text to QR code:");
String sampletext = Console.ReadLine ();
Qrencoder Qrencoder = new Qrencoder (ERRORCORRECTIONLEVEL.M);
QRCode QRCode = Qrencoder.encode (sampletext);
for (int j = 0; J < QrCode.Matrix.Width; J +)
{for
(int i = 0; i < qrCode.Matrix.Width; i++)
{
Char Chartoprint = Qrcode.matrix[i, j]? ' █ ': ';
Console.Write (Chartoprint);
}
Console.WriteLine ();
}
Console.WriteLine (@ "Press any key to quit.");
Console.readkey ();

This code produces the following output:

To draw a two-dimensional code on a graphics:

Const string HelloWorld = "Hello world!";
Qrencoder Qrencoder = new Qrencoder (ErrorCorrectionLevel.H);
QRCode QRCode = Qrencoder.encode (HelloWorld);
const int modulesizeinpixels = 5;
Renderer Renderer = new Renderer (Modulesizeinpixels, Brushes.black, brushes.white);
panel panel = new Panel ();
Point padding = new Point (10,16);
Size qrcodesize = renderer. Measure (qrCode.Matrix.Width);
Panel. AutoSize = false;
Panel. Size = qrcodesize + new Size (2 * padding. X, 2 * padding. Y);
using (Graphics Graphics = panel. CreateGraphics ())
{
renderer. Draw (graphics, Qrcode.matrix, padding);
}

To draw a two-dimensional code on a writeablebitmap:

 const string HelloWorld = "Hello world!";
Qrencoder Qrencoder = new Qrencoder (ErrorCorrectionLevel.H);
QRCode QRCode = new QRCode ();
Qrencoder.tryencode (HelloWorld, out qrcode);
const int modulesizeinpixels = 5; Renderer Renderer = new Renderer (modulesizeinpixels); Black&white is default colour for drawing QRCode//matrix under QRCode might to null if input string is null or empt 
Y. Module wide is version 1 QRCode ' s width. int pixelsize = Qrcode.matrix = null? Renderer. Measure: Renderer.
Measure (QrCode.Matrix.Width);
WriteableBitmap Wbitmap = new WriteableBitmap (pixelsize, Pixelsize, n, pixelformats.gray8, NULL); If Wbitmap is null value.
Renderer'll create Gray8 Bitmap as default. Renderer. Draw (Wbitmap, Qrcode.matrix);
Default offset position is (0, 0); Now, can put wbitmap to image control's Source or use it to create image file. 

If you need to render a two-dimensional code in a WinForm or WPF application, you can drag the class library directly into the Toolbox and drag the control directly onto the form.

Save the two-dimensional code directly to the file:

Qrencoder Qrencoder = new Qrencoder (ErrorCorrectionLevel.H);
QRCode QRCode = new QRCode ();
Qrencoder.tryencode (HelloWorld, out qrcode);
Renderer Renderer = new Renderer (5, Brushes.black, brushes.white);
Renderer. Createimagefile (Qrcode.matrix, @ "C:\temp\HelloWorld.png", imageformat.png);

To write a two-dimensional code to the stream:

Qrencoder Qrencoder = new Qrencoder (ErrorCorrectionLevel.H);
QRCode QRCode = new QRCode ();
Qrencoder.tryencode (HelloWorld, out qrcode);
Renderer Renderer = new Renderer (5, Brushes.black, brushes.white);
MemoryStream ms = new MemoryStream ();
Renderer. WriteToStream (Qrcode.matrix, MS, Imageformat.png);

The above mentioned is small set to introduce C # using Qrcode.net to generate two-dimensional code (QR code), I hope to help you, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!