Create a blank ASP.NET Core Web application.

Server side: Add references to the Vintasoft nuget-packages to ASP.NET Core Web application.

Server side: Add Web API controller that allows to generate barcode image.

• Press the right mouse button on the "Controllers" folder and select the "Add => Controller..." menu from context menu
  
• Select Empty API controller template, set the controller name to the "MyVintasoftBarcodeApiController" and press the "Add" button
  
• Specify that MyVintasoftBarcodeApiController class is derived from Vintasoft.Barcode.AspNetCore.ApiControllers.VintasoftBarcodeApiController class
  
  Here are source codes of MyVintasoftBarcodeApiController class:
  
  • C#

  using Vintasoft.Barcode.AspNetCore.ApiControllers;
  
  namespace WebApplication1.Controllers
  {
      public class MyVintasoftBarcodeApiController : VintasoftBarcodeApiController
      {
  
          public MyVintasoftBarcodeApiController(IWebHostEnvironment hostingEnvironment)
              : base(hostingEnvironment)
          {
          }
  
      }
  }
  
  

  
  

Server side: Specify that VintaSoft Barcode .NET SDK should use SkiaSharp library for drawing of 2D graphics.

// specify that VintaSoft Barcode .NET SDK should use SkiaSharp library for drawing of 2D graphics
Vintasoft.Barcode.SkiaSharpAssembly.Init();

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.

builder.Services.AddControllersWithViews().AddNewtonsoftJson();

var app = builder.Build();

app.UseDefaultFiles();
app.MapStaticAssets();

// Configure the HTTP request pipeline.

app.UseHttpsRedirection();

app.UseAuthorization();

app.MapControllers();

app.MapFallbackToFile("/index.html");

app.Run();

Client side: Add Vintasoft JavaScript files to the project.

• Add the "wwwroot\lib\Vintasoft" folder to ASP.NET Core application.
  
  
• Copy JavaScript-file "Vintasoft.Shared.js" from Github into "wwwroot\lib\Vintasoft\" folder.
  Copy JavaScript-file "Vintasoft.Barcode.js" from Github into "wwwroot\lib\Vintasoft\" folder.
  

Client side: Add JavaScript code, which generate barcode and displays generated barcode image, to the web view.

• Open file "Views\Home\Index.cshtml", clear the file, add HTML code (references to VintaSoft JavaScript files; IMG-element that will display generated barcode image) to the "Index.cshtml" file:
  
  Here is HTML code of "Index.cshtml" file:
  
  • HTML

  <script src="~/lib/Vintasoft/Vintasoft.Shared.js" type="text/javascript"></script>
  <script src="~/lib/Vintasoft/Vintasoft.Barcode.js" type="text/javascript"></script>
  
  <img id="barcodeImage" src="" />
  
  

  
  
• Open file "wwwroot\js\site.js", clear the file, add JavaScript code (generates barcode image and displays generated barcode image) to the "site.js" file:
  
  Here is JavaScript code that generates barcode image and displays generated barcode image:
  
  • JavaScript

  /**
   * Generates 1D barcode image.
   */
  function generate1dBarcodeImage(barcodeType, barcodeValue) {
      // create service that allows to generate barcode
      var barcodeService = new Vintasoft.Shared.WebServiceControllerJS("/vintasoft/api/MyVintasoftBarcodeApi");
  
      // create the barcode writer
      var barcodeWriter = new Vintasoft.Barcode.WebBarcodeWriterJS(barcodeService);
  
      // create the barcode writer settings for generating 1D barcode
      var barcodeWriterSettings = new Vintasoft.Barcode.Web1DBarcodeWriterSettingsJS();
      // specify that barcode writer must generate QR barcode image
      barcodeWriterSettings.set_BarcodeType(new Vintasoft.Barcode.Web1DBarcodeTypeEnumJS(barcodeType));
      // specify the Code128 barcode value
      barcodeWriterSettings.set_Value(barcodeValue);
  
      // specify settings for barcode writer
      barcodeWriter.set_Settings(barcodeWriterSettings);
  
      // send an asynchronous request for getting barcode image as Base64 string
      barcodeWriter.getBarcodeAsBase64Image(__writeBarcode_success, __writeBarcode_failed);
  }
  
  /**
   * Generates 2D barcode image.
   */
  function generate2dBarcodeImage(barcodeType, barcodeValue) {
      // create web service that allows to generate barcode
      var barcodeService = new Vintasoft.Shared.WebServiceControllerJS("/vintasoft/api/MyVintasoftBarcodeApi");
  
      // create the barcode writer
      var barcodeWriter = new Vintasoft.Barcode.WebBarcodeWriterJS(barcodeService);
  
      // create the barcode writer settings for generating 2D barcode
      var barcodeWriterSettings = new Vintasoft.Barcode.Web2DBarcodeWriterSettingsJS();
      // specify that barcode writer must generate QR barcode image
      barcodeWriterSettings.set_BarcodeType(new Vintasoft.Barcode.Web2DBarcodeTypeEnumJS(barcodeType));
      // specify the QR barcode value
      barcodeWriterSettings.set_Value(barcodeValue);
  
      // specify settings for barcode writer
      barcodeWriter.set_Settings(barcodeWriterSettings);
  
      // send an asynchronous request for getting barcode image as Base64 string
      barcodeWriter.getBarcodeAsBase64Image(__writeBarcode_success, __writeBarcode_failed);
  }
  
  /**
   * Barcode is generated successfully.
   */
  function __writeBarcode_success(data) {
      if (data.success) {
          var barcodeImage = data.barcodeImage;
          document.getElementById("barcodeImage").src = barcodeImage;
      }
      else {
          alert(data.errorMessage);
      }
  }
  
  /**
   * Barcode generation is failed.
   */
  function __writeBarcode_failed(data) {
      // show information about error
      alert(data.errorMessage);
  }
  
  
  // set the session identifier
  Vintasoft.Shared.WebImagingEnviromentJS.set_SessionId("SessionID");
  // generate image of QR barcode with value "12345"
  generate2dBarcodeImage("QR", "12345");
  
  

  
  

Run the ASP.NET Core application and see the result.