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How to Create and Read Barcodes in C#

tilalahmad profile image Tilal Ahmad Sana Originally published at blog.aspose.cloud ・3 min read

If I have a requirement to create and read barcodes in my application, I would prefer to use some webservice. Because it eliminates the overhead to install and maintain a separate software to create and read barcodes. In this article I will share a REST API solution, Aspose.BarCode Cloud, for working with the barcode in your application.

Aspose.BarCode Cloud is a barcode generation and recognition REST API solution, that supports the generation and recognition of 1D (Linear), 2D and postal barcodes of 60+ symbologies.

In this article, I will use Aspose.BarCode Cloud SDK for .NET with C#. However, if you are using some other programming language you can check SDKs of other popular programming languages and can user it directly in your favorite platform. You can read the blog post for more details.

Let's start the code:

Create Barcode

Step 1: First thing first, sign up with aspose.cloud to get your AppSID and AppKey
Step 2: Create a new project in Visual Studio and install Aspose.BarCode SDK for .NET package from NuGet

PM> Install-Package Aspose.BarCode-Cloud

Step 3: Copy paste the following code in the new project to create a barcode and run it. We are creating datamatrix 2D barcode as PNG image. The used API method returns barcode image as stream, you can consume it as per your requirement.

// Get App Key and App SID from https://dashboard.aspose.cloud/
// Instantiate Aspose BarCode Cloud API SDK
var barCodeApi = new BarCodeApi(AppKey, AppSid);

// Set Filename of image
String datafolder = "C:/Temp/";

// Set Filename of image
String name = "sample-barcode";

// Set Text to encode inside barcode
String text = "Aspose.BarCode";

// Set Barcode Symbology
String type = "datamatrix";

// Set Barcode Image Format
String format = "PNG";

// Sets if checksum will be added to barcode image.
String enableChecksum = null;

// Set optional params (if any) 
float? resolutionX = null;
float? resolutionY = null;
float? dimensionX = null;
float? dimensionY = null;
try
    {
     // Invoke Aspose.BarCode Cloud SDK API to create barcode and returns result as stream in the response
     using (Stream response = barCodeApi.BarCodeGetBarCodeGenerate(new BarCodeGetBarCodeGenerateRequest(text, type, format, resolutionX, resolutionY, dimensionX, dimensionY, enableChecksum)))
     // Download generated barcode from api response
     using (FileStream stream = File.Create(datafolder + name + "." + format))
     {
         response.CopyTo(stream);
     }
     Console.WriteLine("Generate Barcode to Local File, Done!");
}
catch (Exception ex)
{
     Console.WriteLine("error:" + ex.Message + "\n" + ex.StackTrace);
}

Read Barcode

To read barcode, repeat the above steps 1 and 2, if required.

Step 3: Copy paste the following code in the new project to read the barcode image from local drive. It recognizes the barcode image and return the barcode type and value.

// Get App Key and App SID from https://dashboard.aspose.cloud/
// Instantiate Aspose BarCode Cloud API SDK
var barCodeApi = new BarCodeApi(AppKey, AppSid);

// Set Filename of image
String datafolder = "C:/Temp/";

// Set input file name
String name = "sample-barcode.png";

// The barcode type. If this parameter is empty, autodetection of all supported types is used.
String type = "";

// Set mode for checksum validation during recognition
String checksumValidation = "";

// Set if FNC symbol stripping should be performed
bool stripFnc = false;

// Set recognition of rotated barcode
int rotationAngle = 0;

// Set the image file url 
String url = null;

Stream file = System.IO.File.OpenRead(datafolder + name);

try
  {
     // Invoke Aspose.BarCode Cloud SDK API to read barcode from local file
     var apiResponse = barCodeApi.BarCodePostBarCodeRecognizeFromUrlorContent( new BarCodePostBarCodeRecognizeFromUrlorContentRequest(type, checksumValidation, stripFnc, rotationAngle, url, file));

     if (apiResponse != null)
      {
        foreach (var barcode in apiResponse.BarCodes)
        {
         Console.WriteLine("Codetext: " + barcode.BarCodeValue + "\nType: " + barcode.BarCodeType);
        }
         Console.WriteLine("Read Barcode from Local File, Done!");
     }
}
catch (Exception ex)
{
     Console.WriteLine("error:" + ex.Message + "\n" + ex.StackTrace);
}

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