Create a blank Vue and ASP.NET Core application.

• Open Visual Studio .NET 2022 and create a new application of "Vue and ASP.NET Core" type:
  
  
• Configure the application to use .NET 8.0:
  

Server side: Add references to the Vintasoft assemblies to "VueApp1.Server" project.

Server side: Specify drawing engine, which should be used by VintaSoft Imaging .NET SDK for drawing of 2D graphics.

• Add reference to the Vintasoft.Imaging.Drawing.SkiaSharp.dll assembly.
• Add reference to the SkiaSharp nuget-package version 2.88.9.
• Open "Program.cs" file in "VueApp1.Server" project, add code line "Vintasoft.Imaging.Drawing.SkiaSharp.SkiaSharpDrawingFactory.SetAsDefault();" at the beginning of file - added code specifies that VintaSoft Imaging .NET SDK should use SkiaSharp library for drawing of 2D graphics.

• Add reference to the Vintasoft.Imaging.Gdi.dll assembly.
• Open "Program.cs" file in "VueApp1.Server" project, add code line "Vintasoft.Imaging.Drawing.Gdi.GdiGraphicsFactory.SetAsDefault();" at the beginning of file - added code specifies that VintaSoft Imaging .NET SDK should use System.Drawing library for drawing of 2D graphics.

Server side: Create web services, which allow to upload/download file, manage image collection, get information about images, get thumbnails, render image tiles.

• Create web service that allows to upload/download file

  • 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 "MyVintasoftFileApiController" and press the "Add" button
    
  • Specify that MyVintasoftFileApiController class is derived from Vintasoft.Imaging.AspNetCore.ApiControllers.VintasoftFileApiController class
    
    Here are source codes of MyVintasoftFileApiController class:
    
    • C#

    namespace WebApplication1.Controllers
    {
        public class MyVintasoftFileApiController : Vintasoft.Imaging.AspNetCore.ApiControllers.VintasoftFileApiController
        {
    
            public MyVintasoftFileApiController(IWebHostEnvironment hostingEnvironment)
                : base(hostingEnvironment)
            {
            }
    
        }
    }
    
    

• Create web service that allows to manage image collection

  • 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 "MyVintasoftImageCollectionApiController" and press the "Add" button
    
  • Specify that MyVintasoftImageCollectionApiController class is derived from Vintasoft.Imaging.AspNetCore.ApiControllers.VintasoftImageCollectionApiController class
    
    Here are source codes of MyVintasoftImageCollectionApiController class:
    
    • C#

    namespace WebApplication1.Controllers
    {
        public class MyVintasoftImageCollectionApiController : Vintasoft.Imaging.AspNetCore.ApiControllers.VintasoftImageCollectionApiController
        {
    
            public MyVintasoftImageCollectionApiController(IWebHostEnvironment hostingEnvironment)
                : base(hostingEnvironment)
            {
            }
    
        }
    }
    
    

• Create web service that allows to get information about images, get thumbnails, render image tiles, extract/search text

  • 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 "MyVintasoftImageApiController" and press the "Add" button
    
  • Specify that MyVintasoftImageApiController class is derived from Vintasoft.Imaging.AspNetCore.ApiControllers.VintasoftImageApiController class
    
    Here are source codes of MyVintasoftImageApiController class:
    
    • C#

    namespace WebApplication1.Controllers
    {
        public class MyVintasoftImageApiController : Vintasoft.Imaging.AspNetCore.ApiControllers.VintasoftImageApiController
        {
    
            public MyVintasoftImageApiController(IWebHostEnvironment hostingEnvironment)
                : base(hostingEnvironment)
            {
            }
    
        }
    }
    
    

Server side: Create CORS-policy that allows to access web services from client side.

• Open the "Program.cs" file in "VueApp1.Server" project and add code that:
  • Creates CORS-policy that allows to access web services from "localhost"
  • Enables CORS usage in "VueApp1.Server" project
  
  Here are source codes of "Program.cs" file after update:
  
  • C#

  Vintasoft.Imaging.Drawing.SkiaSharp.SkiaSharpDrawingFactory.SetAsDefault();
  
  var builder = WebApplication.CreateBuilder(args);
  
  // Add services to the container.
  
  builder.Services.AddControllers();
  
  builder.Services.AddCors(options =>
  {
      options.AddPolicy(name: "CorsPolicy1", policy =>
      {
          policy.SetIsOriginAllowed(origin => new Uri(origin).Host == "localhost").AllowAnyHeader().AllowAnyMethod();
      });
  });
  
  var app = builder.Build();
  
  app.UseDefaultFiles();
  app.UseStaticFiles();
  
  // Configure the HTTP request pipeline.
  
  app.UseHttpsRedirection();
  
  app.UseAuthorization();
  
  app.UseCors("CorsPolicy1");
  
  app.MapControllers();
  
  app.MapFallbackToFile("/index.html");
  
  app.Run();
  
  

Server side: Update launch URL in 'launchSettings.json' file.

• Open file "Properties\launchSettings.json" in "VueApp1.Server" and clear launch URL:
  

Server side: Copy the default test PDF document to a server side.

• Create folder "UploadedImageFiles\SessionID" in "VueApp1.Server" project and copy test PDF document "<SdkInstallPath>\VintaSoft\Imaging .NET 14.0\Examples\ASP.NET Core\CSharp\AspNetCoreImagingDemo\wwwroot\UploadedImageFiles\VintasoftImagingDemo.pdf" to the folder. This document will be displayed in image viewer.
  
  

Compile the project for restoring dependencies using 'npm'.

Delete files, which are not necessary in this tutorial.

• Delete files "WeatherForecast.cs" and "Controllers\WeatherForecastController.cs" in "VueApp1.Server" project - the WeatherForecast Web API controller is not necessary in this tutorial.
  
  
• Delete files "src\components\TheWelcome.vue", "src\components\WelcomeItem.vue" in "vueapp1.client" project - this Vue-component is not necessary in this tutorial.
  
  
• Open file "src\App.vue" in "vueapp1.client" project and delete code that uses the following Vue-components: HelloWorld, TheWelcome - these Vue-components are not necessary in this tutorial.
  Here are source codes of "App.vue" file after update:
  
  • JavaScript

  <script setup>
  </script>
  
  <template>
      <main>
      </main>
  </template>
  
  <style scoped>
  </style>
  
  

Client side: Add JavaScript files to the "vueapp1.client" project.

• Copy files Vintasoft.Shared.js and Vintasoft.Imaging.js from "<InstallPath>\VintaSoft Imaging .NET 14.0\Bin\JavaScript\" folder to the root folder of "vueapp1.client" project.
  
  
• Add references to Vintasoft JavaScript files to the header of "index.html" file in "vueapp1.client" project.
  
  
  Here are source codes of "index.html" file after update:
  
  • HTML

  <!DOCTYPE html>
  <html lang="en">
  <head>
      <meta charset="UTF-8">
      <link rel="icon" href="/favicon.ico">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <title>Vite App</title>
  
      <script src="Vintasoft.Shared.js" type="text/javascript"></script>
      <script src="Vintasoft.Imaging.js" type="text/javascript"></script>
  </head>
  <body>
      <div id="app"></div>
      <script type="module" src="/src/main.js"></script>
  </body>
  </html>
  
  

Client side: Create Vue-component that displays image viewer.

• In "vueapp1.client" project in folder "src\components\" create "ImageViewerDemo.vue" file that will contain source codes of Vue-component:
  • Select "Add => New Item..." context menu for folder "src\components\" in "vueapp1.client" project => "Add new item" dialog will appear
  • Install template "Vue TypeScript Template" from internet if template is not installed in Visual Studio
  • Select "Vue TypeScript Template" type for new item
  • Set "ImageViewerDemo.vue" as element name
  • Click the "Add" button => dialog will be closed and file "ImageViewerDemo.vue" will be added into folder "src\components\"
  
  In ImageViewerDemo.vue file add template that represents demo header and div-element that will display image viewer:
  
  
  In ImageViewerDemo.vue file change script type from TypeScript to JavaScript:
  
  
  In ImageViewerDemo.vue file add 'mounted' function (contains JavaScript code that initializes and creates web image viewer):
  
  
  In ImageViewerDemo.vue file add CSS-style for Vue-component:
  
  
  Important: Visual Studio uses randomized network port for ASP.NET Core API and you need to update JavaScript code and change web services URL from "https://localhost:7113/" to URL in your application.
  
  Here is HTML/CSS/JavaScript code of ImageViewerDemo Vue-component:
  
  • JavaScript

  <template>
      <h1>VintaSoft Image Viewer Demo (ASP.NET Core + Vue)</h1>
  
      <div class="imageViewerDemoContainer">
          <div id="WebThumbnailViewer1Div" class="thumbnailViewerContainer"></div>
          <div id="WebImageViewer1Div" class="imageViewerContainer"></div>
      </div>
  </template>
  
  <script lang="js">
      import { defineComponent } from 'vue';
  
      export default defineComponent({
          mounted() {
              // set the session identifier
              Vintasoft.Shared.WebImagingEnviromentJS.set_SessionId("SessionID");
  
              // specify web services, which should be used by Vintasoft Web Document Viewer
              Vintasoft.Shared.WebServiceJS.defaultFileService =
                  new Vintasoft.Shared.WebServiceControllerJS("https://localhost:7113/vintasoft/api/MyVintasoftFileApi");
              Vintasoft.Shared.WebServiceJS.defaultImageCollectionService =
                  new Vintasoft.Shared.WebServiceControllerJS("https://localhost:7113/vintasoft/api/MyVintasoftImageCollectionApi");
              Vintasoft.Shared.WebServiceJS.defaultImageService =
                  new Vintasoft.Shared.WebServiceControllerJS("https://localhost:7113/vintasoft/api/MyVintasoftImageApi");
  
              // create thumbnail viewer
              let thumbnailViewer = new Vintasoft.Imaging.UI.WebThumbnailViewerJS("WebThumbnailViewer1Div");
              // specify that thumbnail viewer should not cache thumbnails on server side
              thumbnailViewer.set_UseCache(false);
  
              // create image viewer
              let imageViewer = new Vintasoft.Imaging.UI.WebImageViewerJS("WebImageViewer1Div");
              // specify that image viewer should not cache image tiles on server side
              imageViewer.set_UseCache(false);
  
              // specify that image viewer depends from thumbnail viewer
              imageViewer.set_MasterViewer(thumbnailViewer);
  
              // open file from session folder and add images from file to the image viewer
              imageViewer.get_Images().openFile("VintasoftImagingDemo.pdf");
          }
      });
  </script>
  
  <style>
      h1 {
          width: 1200px;
          text-align: center;
      }
  
      .imageViewerDemoContainer {
          display: flex;
      }
  
      .thumbnailViewerContainer {
          width: 200px;
          height: 800px;
      }
  
      .imageViewerContainer {
          width: 1200px;
          height: 800px;
      }
  </style>
  
  

  
  
• Add created Vue-component to the Vue-application code - "src\App.vue" file.
  
  
  Here are source codes of "App.vue" file after update:
  
  • JavaScript

  <script setup>import ImageViewerDemo from './components/ImageViewerDemo.vue'</script>
  
  <template>
    <main>
        <ImageViewerDemo />
    </main>
  </template>
  
  <style scoped>
  </style>
  
  

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