Get Started - Generate a QR Code

• Jul 13, 2020
• 2 minutes to read

Important

You require a license to the DevExpress Office File API or DevExpress Universal Subscription to use these examples in production code. Refer to the DevExpress Subscription page for pricing information.

To get started with a Barcode Generation API, perform the following steps.

1. Create a new Windows Forms Application project.
2. Add reference to the DevExpress.Docs.v19.1.dll and the DevExpress.Data.v19.1.dll assemblies.
3. Drag a Button from the Toolbox and drop it on the form. Drag a PictureBox from the Toolbox and drop it on the form.

4. Insert the code listed below into the method that handles the Click button event.

   C#

   using DevExpress.BarCodes;
   //...
   this.pictureBox1.Image = null;
   
   BarCode barCode = new BarCode();
   barCode.Symbology = Symbology.QRCode;
   barCode.CodeText = "http://www.devexpress.com";
   barCode.BackColor = Color.White;
   barCode.ForeColor = Color.Black;
   barCode.RotationAngle = 0;
   barCode.CodeBinaryData = Encoding.Default.GetBytes(barCode.CodeText);
   barCode.Options.QRCode.CompactionMode = QRCodeCompactionMode.Byte;
   barCode.Options.QRCode.ErrorLevel = QRCodeErrorLevel.Q;
   barCode.Options.QRCode.ShowCodeText = false;
   barCode.DpiX = 72;
   barCode.DpiY = 72;
   barCode.Module = 2f;
   
   this.pictureBox1.Image = barCode.BarCodeImage;
   pictureBox1.Size = pictureBox1.Image.Size;
   

   VB.NET

   Imports DevExpress.BarCodes
   '...
   Me.pictureBox1.Image = Nothing
   
   Dim barCode As New BarCode()
   barCode.Symbology = Symbology.QRCode
   barCode.CodeText = "http:/www.devexpress.com"
   barCode.BackColor = Color.White
   barCode.ForeColor = Color.Black
   barCode.RotationAngle = 0
   barCode.CodeBinaryData = Encoding.Default.GetBytes(barCode.CodeText)
   barCode.Options.QRCode.CompactionMode = QRCodeCompactionMode.Byte
   barCode.Options.QRCode.ErrorLevel = QRCodeErrorLevel.Q
   barCode.Options.QRCode.ShowCodeText = False
   barCode.DpiX = 72
   barCode.DpiY = 72
   barCode.Module = 2F
   
   Me.pictureBox1.Image = barCode.BarCodeImage
   pictureBox1.Size = pictureBox1.Image.Size
   

5. Run the project and click the button. See the resulting QR barcode in the PictureBox control.