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966016: Sample on How to Dynamically enable or disable Text Selection
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‎How to/Dynamically enable or disable Text Selection/Dynamically enable or disable Text Selection.sln

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.5.2.0
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PdfViewerApp", "PdfViewerApp\PdfViewerApp.csproj", "{C9CC25B9-30AB-08BE-C969-C8B6D4A156D7}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{C9CC25B9-30AB-08BE-C969-C8B6D4A156D7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{C9CC25B9-30AB-08BE-C969-C8B6D4A156D7}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{C9CC25B9-30AB-08BE-C969-C8B6D4A156D7}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{C9CC25B9-30AB-08BE-C969-C8B6D4A156D7}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {BFFAA0D9-4F91-4FF6-B8DD-05C07AE23993}
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EndGlobalSection
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EndGlobal

‎How to/Dynamically enable or disable Text Selection/PdfViewerApp/Controllers/HomeController.cs

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using System.Diagnostics;
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using Microsoft.AspNetCore.Mvc;
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using PdfViewerApp.Models;
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namespace PdfViewerApp.Controllers;
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public class HomeController : Controller
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{
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private readonly ILogger<HomeController> _logger;
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public HomeController(ILogger<HomeController> logger)
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{
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_logger = logger;
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}
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public IActionResult Index()
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{
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return View();
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}
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public IActionResult Privacy()
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{
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return View();
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}
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[ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
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public IActionResult Error()
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{
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return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
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}
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}

‎How to/Dynamically enable or disable Text Selection/PdfViewerApp/Models/ErrorViewModel.cs

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namespace PdfViewerApp.Models;
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public class ErrorViewModel
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{
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public string? RequestId { get; set; }
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public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
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}

‎How to/Dynamically enable or disable Text Selection/PdfViewerApp/PdfViewerApp.csproj

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<Project Sdk="Microsoft.NET.Sdk.Web">
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<PropertyGroup>
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<TargetFramework>net9.0</TargetFramework>
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<Nullable>enable</Nullable>
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<ImplicitUsings>enable</ImplicitUsings>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Syncfusion.EJ2.AspNet.Core" Version="29.2.11" />
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<PackageReference Include="Syncfusion.EJ2.PdfViewer.AspNet.Core" Version="29.2.11" />
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</ItemGroup>
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</Project>

‎How to/Dynamically enable or disable Text Selection/PdfViewerApp/Program.cs

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var builder = WebApplication.CreateBuilder(args);
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// Add services to the container.
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builder.Services.AddControllersWithViews();
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builder.Services.AddControllersWithViews();
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builder.Services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
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var app = builder.Build();
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// Configure the HTTP request pipeline.
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if (!app.Environment.IsDevelopment())
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{
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app.UseExceptionHandler("/Home/Error");
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// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
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app.UseHsts();
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}
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app.UseHttpsRedirection();
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app.UseRouting();
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app.UseAuthorization();
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app.MapStaticAssets();
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app.MapControllerRoute(
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name: "default",
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pattern: "{controller=Home}/{action=Index}/{id?}")
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.WithStaticAssets();
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app.Run();

‎How to/Dynamically enable or disable Text Selection/PdfViewerApp/Properties/launchSettings.json

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{
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"$schema": "https://json.schemastore.org/launchsettings.json",
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"profiles": {
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"http": {
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"commandName": "Project",
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"dotnetRunMessages": true,
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"launchBrowser": true,
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"applicationUrl": "http://localhost:5257",
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"environmentVariables": {
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"ASPNETCORE_ENVIRONMENT": "Development"
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}
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},
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"https": {
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"commandName": "Project",
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"dotnetRunMessages": true,
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"launchBrowser": true,
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"applicationUrl": "https://localhost:7060;http://localhost:5257",
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"environmentVariables": {
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"ASPNETCORE_ENVIRONMENT": "Development"
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}
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}
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}
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}

‎How to/Dynamically enable or disable Text Selection/PdfViewerApp/Views/Home/Index.cshtml

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@using Syncfusion.EJ2
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@{
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ViewBag.Title = "Home Page";
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}
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<div>
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<div style="height:500px;width:100%;">
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<button onclick="enableTextSelection()">EnableTextSelection</button>
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<button onclick="disableTextSelection()">DisableTextSelection</button>
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@Html.EJS().PdfViewer("pdfviewer").DocumentPath("https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf").ResourceUrl("https://cdn.syncfusion.com/ej2/30.1.37/dist/ej2-pdfviewer-lib").EnableTextSelection(false).Render();
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</div>
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</div>
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<script type="text/javascript">
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function enableTextSelection()
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{
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var viewer = document.getElementById('pdfviewer').ej2_instances[0];
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viewer.enableTextSelection=true;
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}
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function disableTextSelection()
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{
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var viewer = document.getElementById('pdfviewer').ej2_instances[0];
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viewer.enableTextSelection=false;
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}
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</script>

‎How to/Dynamically enable or disable Text Selection/PdfViewerApp/Views/Home/Privacy.cshtml

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@{
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ViewData["Title"] = "Privacy Policy";
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}
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<h1>@ViewData["Title"]</h1>
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<p>Use this page to detail your site's privacy policy.</p>

‎How to/Dynamically enable or disable Text Selection/PdfViewerApp/Views/Shared/Error.cshtml

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@model ErrorViewModel
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@{
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ViewData["Title"] = "Error";
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}
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<h1 class="text-danger">Error.</h1>
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<h2 class="text-danger">An error occurred while processing your request.</h2>
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@if (Model.ShowRequestId)
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{
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<p>
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<strong>Request ID:</strong> <code>@Model.RequestId</code>
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</p>
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}
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<h3>Development Mode</h3>
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<p>
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Swapping to <strong>Development</strong> environment will display more detailed information about the error that occurred.
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</p>
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<p>
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<strong>The Development environment shouldn't be enabled for deployed applications.</strong>
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It can result in displaying sensitive information from exceptions to end users.
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For local debugging, enable the <strong>Development</strong> environment by setting the <strong>ASPNETCORE_ENVIRONMENT</strong> environment variable to <strong>Development</strong>
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and restarting the app.
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</p>

‎How to/Dynamically enable or disable Text Selection/PdfViewerApp/Views/Shared/_Layout.cshtml

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@using Syncfusion.EJ2
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>@ViewData["Title"] - PdfViewerApp</title>
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<script type="importmap"></script>
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<link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.min.css" />
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<link rel="stylesheet" href="~/css/site.css" asp-append-version="true" />
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<link rel="stylesheet" href="~/PdfViewerApp.styles.css" asp-append-version="true" />
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<link rel="stylesheet" href="https://cdn.syncfusion.com/ej2/29.1.33/fluent.css" />
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<script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js"></script>
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</head>
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<body>
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<header>
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<nav class="navbar navbar-expand-sm navbar-toggleable-sm navbar-light bg-white border-bottom box-shadow mb-3">
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<div class="container-fluid">
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<a class="navbar-brand" asp-area="" asp-controller="Home" asp-action="Index">PdfViewerApp</a>
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<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target=".navbar-collapse" aria-controls="navbarSupportedContent"
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aria-expanded="false" aria-label="Toggle navigation">
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<span class="navbar-toggler-icon"></span>
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</button>
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<div class="navbar-collapse collapse d-sm-inline-flex justify-content-between">
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<ul class="navbar-nav flex-grow-1">
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<li class="nav-item">
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<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Index">Home</a>
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</li>
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<li class="nav-item">
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<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
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</li>
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</ul>
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</div>
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</div>
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</nav>
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</header>
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<div class="container">
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<main role="main" class="pb-3">
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@RenderBody()
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</main>
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</div>
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<footer class="border-top footer text-muted">
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<div class="container">
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&copy; 2025 - PdfViewerApp - <a asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
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</div>
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</footer>
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<script src="~/lib/jquery/dist/jquery.min.js"></script>
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<script src="~/lib/bootstrap/dist/js/bootstrap.bundle.min.js"></script>
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<script src="~/js/site.js" asp-append-version="true"></script>
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@await RenderSectionAsync("Scripts", required: false)
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@Html.EJS().ScriptManager()
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</body>
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</html>

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