Write 1D and 2D Barcodes to an Image - Console C#

This tutorial shows how to write barcodes onto an image and save the file in a C# Windows Console application using the LEADTOOLS SDK.

Required Knowledge

Get familiar with the basic steps of creating a project by reviewing the Add References and Set a License tutorial, before working on the Write 1D and 2D Barcodes to an Image - Console C# tutorial.

Create the Project and Add LEADTOOLS References

Start with a copy of the project created in the Add References and Set a License tutorial. If you don't have that project, follow the steps in that tutorial to create it.

The references needed depend upon the purpose of the project. References can be added by one or the other of the following two methods (but not both). For this project, the following references are needed:

If using NuGet references, this tutorial requires the following NuGet package:

• Leadtools.Barcode

If local DLL references are used, the following DLLs are needed. The DLLs are located at <INSTALL_DIR>\LEADTOOLS22\Bin\Dotnet4\x64:

• Leadtools.dll
• Leadtools.Barcode.dll
• Leadtools.Barcode.OneD.dll
• Leadtools.Barcode.QrWrite.dll
• Leadtools.Codecs.dll
• Leadtools.Codecs.Png.dll

For a complete list of which DLL files are required for your application, refer to Files to be Included in your Application.

Set the License File

The License unlocks the features needed for the project. It must be set before any toolkit function is called. For details, including tutorials for different platforms, refer to Setting a Runtime License.

There are two types of runtime licenses:

• Evaluation license, obtained at the time the evaluation toolkit is downloaded. It allows the toolkit to be evaluated.
• Deployment license. If a Deployment license file and developer key are needed, refer to Obtaining a License.

Note

Adding LEADTOOLS NuGet and local references and setting a license are covered in more detail in the Add References and Set a License tutorial.

Add the Barcode Writer Code

With the project created, the references added, and the license set, coding can begin.

Open the Program.cs in the Solution Explorer and add the following statements to the using block at the top of Program.cs:

// Using block at the top 
using System; 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Barcode; 

Add the below global BarcodeEngine variable.

static BarcodeEngine barcodeEngine = new BarcodeEngine(); 

Add two new methods called WriteUPCABarcode(RasterImage image) and WriteQRBarcode(RasterImage image). Call them from inside the Main method. Add the below code to write UPCA and QR barcodes to a blank image and then save that image to file.

Note

This code saves the file to the C:\temp directory. Create the directory if it does not exist, or change the path to a valid folder.

static void Main(string[] args) 
{ 
   SetLicense(); 
 
   using (RasterImage image = RasterImage.Create(2550, 3300, 24, 300, RasterColor.White)) 
   { 
      WriteUPCABarcode(image); 
      WriteQRBarcode(image); 
      SaveImage(image, @"C:\temp\Write1Dand2DBarcodes.png"); 
   } 
   Console.WriteLine("Press any key to exit..."); 
   Console.ReadKey(true); 
} 

static void WriteUPCABarcode(RasterImage image) 
{ 
   BarcodeData data = new BarcodeData 
   { 
      Symbology = BarcodeSymbology.UPCA, 
      Value = "01234567890", 
      Bounds = new LeadRect(10, 10, 600, 200) 
   }; 
 
   OneDBarcodeWriteOptions options = new OneDBarcodeWriteOptions 
   { 
      EnableErrorCheck = true, 
      TextPosition = BarcodeOutputTextPosition.Default 
   }; 
 
   barcodeEngine.Writer.WriteBarcode(image, data, options); 
} 

static void WriteQRBarcode(RasterImage image) 
{ 
   QRBarcodeData data = new QRBarcodeData 
   { 
      SymbolModel = QRBarcodeSymbolModel.Model1AutoSize, 
      Symbology = BarcodeSymbology.QR, 
      Value = "QR Data Value", 
 
      Bounds = new LeadRect(10, 250, image.ImageWidth, image.ImageHeight) 
   }; 
 
   QRBarcodeWriteOptions options = new QRBarcodeWriteOptions 
   { 
      GroupNumber = 0, 
      GroupTotal = 0, 
      XModule = 30, 
      ECCLevel = QRBarcodeECCLevel.LevelL, 
      HorizontalAlignment = BarcodeAlignment.Near, 
      VerticalAlignment = BarcodeAlignment.Near 
   }; 
 
   barcodeEngine.Writer.WriteBarcode(image, data, options); 
} 

static void SaveImage(RasterImage image, string outputFilename) 
{ 
   using (RasterCodecs codecs = new RasterCodecs()) 
      codecs.Save(image, outputFilename, RasterImageFormat.Png, 0); 
   Console.WriteLine(string.Format("The barcodes have been written and saved to {0}", outputFilename)); 
} 

Run the Project

Run the project by pressing F5, or by selecting Debug -> Start Debugging.

If the steps were followed correctly, the application will write the UPCA and QR barcodes to the blank RasterImage and save the image to the specified output file. The resulting RasterImage should look like the following image:

Wrap-up

This tutorial showed how to create a simple console-based Barcode application that writes 1D and 2D barcodes to a given image using the BarcodeWriter class.

See Also

• LEADTOOLS BarcodeEngine Documentation
• LEADTOOLS BarcodeWriter Documentation
• LEADTOOLS SDK Download