. NET generates two-dimensional code

2. To use a class: Qrcodeencoder

   This class to add a dynamic library: ThoughtWorks.QRCode.dll (I do not know how to upload attachments, readers can search the Internet, can also give the author message)

   Then introduce namespaces: using ThoughtWorks.QRCode.Codec;

4. Well, the project begins.

   First, declare an instance of the Qrcodeencoder class:

   Qrcodeencoder Qrcodeencoder = new Qrcodeencoder ();

6. Set the encoding method:

   Qrcodeencoder.qrcodeencodemode = Qrcodeencoder.encode_mode. BYTE;

   Here the author set it to byte-coding (there are two ways to encode, readers can test themselves), now the popular universal QR code is byte-coded.

8.  

   set scale and version:

   < p>

   qrcodeencoder.qrcodeversion = 7;

   Here the size is: 4, Version: 7, the rest of the value of the reader can self-test, these two values basically only changed the size of the QR code, the reader set the value is now commonly used values.

10.  

12. Generate two-dimensional code based on the content of the image, and finally display the resulting image can be:

    String link = "Http://jingyan.baidu.com/user/npublic?un=%E8%BE%B9%E7%BC%98%E6%B2%B3%E5%9B%BE";

    BMP = Qrcodeencoder.encode (link);

    In general, the QR code generates a connection (of course, the reader can change to arbitrary text).

13. The author here encapsulates it into a method that is easy to use:

    <summary>

    Get QR code based on link

    </summary>

    <param name= "link" > Links </param>

    <returns> return QR code image </returns>

    Private Bitmap Getdimensionalcode (string link)

    {

    Bitmap bmp = null;

    Try

    {

    Qrcodeencoder Qrcodeencoder = new Qrcodeencoder ();

    Qrcodeencoder.qrcodeencodemode = Qrcodeencoder.encode_mode. BYTE;

    Qrcodeencoder.qrcodescale = 4;

    int version = Convert.ToInt16 (Cboversion.text);

    Qrcodeencoder.qrcodeversion = 7;

    Qrcodeencoder.qrcodeerrorcorrect = qrcodeencoder.error_correction. M

    BMP = Qrcodeencoder.encode (link);

    }

    catch (Exception ex)

    {

    MessageBox.Show ("Invalid version!");

    }

    return BMP;

    }

15. 8

    OK, take care, look at the two-dimensional code we generated, hehe!