EJ2-900568: How to add custom fonts to the PDF viewer used in the PDF document

How to/Custom Fonts/PDFViewerSample.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.EJ2.AspNet.Core" Version="*" />
+    <PackageReference Include="Syncfusion.EJ2.PdfViewer.AspNet.Core" Version="*" />
+  </ItemGroup>
+
+</Project>

How to/Custom Fonts/PDFViewerSample.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.32112.339
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PDFViewerSample", "PDFViewerSample.csproj", "{39AA1883-BB43-4C46-9892-6033EA59C990}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{39AA1883-BB43-4C46-9892-6033EA59C990}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{39AA1883-BB43-4C46-9892-6033EA59C990}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{39AA1883-BB43-4C46-9892-6033EA59C990}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{39AA1883-BB43-4C46-9892-6033EA59C990}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {5F13CE16-9CC4-4755-AFB4-367F461A209C}
+	EndGlobalSection
+EndGlobal

How to/Custom Fonts/Pages/Error.cshtml

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

How to/Custom Fonts/Pages/Error.cshtml.cs

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+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using System.Diagnostics;
+
+namespace PDFViewerSample.Pages
+{
+    [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
+    [IgnoreAntiforgeryToken]
+    public class ErrorModel : PageModel
+    {
+        public string? RequestId { get; set; }
+
+        public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+
+        private readonly ILogger<ErrorModel> _logger;
+
+        public ErrorModel(ILogger<ErrorModel> logger)
+        {
+            _logger = logger;
+        }
+
+        public void OnGet()
+        {
+            RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier;
+        }
+    }
+}

How to/Custom Fonts/Pages/Index.cshtml

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+@page "{handler?}"
+@model IndexModel
+@{
+    ViewData["Title"] = "Home page";
+}
+
+<div style="width:100%;height:600px">
+    <!-- To configure the server-backed PDF Viewer, include the "serviceUrl='/Index'" attribute -->
+    <ejs-pdfviewer id="pdfviewer"
+                   documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
+                   resourceUrl="https://localhost:44386/wwwroot/ej2-pdfviewer-lib"
+                   customFonts="customFonts"
+                   style="height:641px;">
+    </ejs-pdfviewer>
+</div>
+<script type="text/javascript">
+    var customFonts = ["simsun.ttc", "sumsinb.ttf", "arial/arialbd.ttf", "arial/arial.ttf", "BKANT.TTF", "calibri.ttf", "GARA.TTF", "GARAIT.TTF", "msgothic.ttc", "trebuc.ttf", "wingding.ttf"];
+</script>

How to/Custom Fonts/Pages/Index.cshtml.cs

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+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Caching.Memory;
+using Syncfusion.EJ2.PdfViewer;
+using Newtonsoft.Json;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using System.Reflection;
+using System.Net;
+
+namespace PDFViewerSample.Pages
+{
+    [IgnoreAntiforgeryToken(Order = 1001)]
+    public class IndexModel : PageModel
+    {
+
+        private readonly Microsoft.AspNetCore.Hosting.IHostingEnvironment _hostingEnvironment;
+        private IMemoryCache _cache;
+
+        public IndexModel(Microsoft.AspNetCore.Hosting.IHostingEnvironment hostingEnvironment, IMemoryCache cache)
+        {
+            _hostingEnvironment = hostingEnvironment;
+            _cache = cache;
+        }
+
+        public IActionResult OnPostLoad([FromBody] jsonObjects responseData)
+        {
+            PdfRenderer pdfviewer = new PdfRenderer(_cache);
+            MemoryStream stream = new MemoryStream();
+            var jsonObject = JsonConverterstring(responseData);
+            object jsonResult = new object();
+            if (jsonObject != null && jsonObject.ContainsKey("document"))
+            {
+                if (bool.Parse(jsonObject["isFileName"]))
+                {
+                    string documentPath = GetDocumentPath(jsonObject["document"]);
+                    if (!string.IsNullOrEmpty(documentPath))
+                    {
+                        byte[] bytes = System.IO.File.ReadAllBytes(documentPath);
+                        stream = new MemoryStream(bytes);
+                    }
+                    else
+                    {
+                        string fileName = jsonObject["document"].Split(new string[] { "://" }, StringSplitOptions.None)[0];
+                        if (fileName == "http" || fileName == "https")
+                        {
+                            WebClient WebClient = new WebClient();
+                            byte[] pdfDoc = WebClient.DownloadData(jsonObject["document"]);
+                            stream = new MemoryStream(pdfDoc);
+                        }
+                        else
+                            return this.Content(jsonObject["document"] + " is not found");
+                    }
+                }
+                else
+                {
+                    byte[] bytes = Convert.FromBase64String(jsonObject["document"]);
+                    stream = new MemoryStream(bytes);
+                }
+            }
+            jsonResult = pdfviewer.Load(stream, jsonObject);
+            return Content(JsonConvert.SerializeObject(jsonResult));
+        }
+
+        public Dictionary<string, string> JsonConverterstring(jsonObjects results)
+        {
+            Dictionary<string, object> resultObjects = new Dictionary<string, object>();
+            resultObjects = results.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public)
+                .ToDictionary(prop => prop.Name, prop => prop.GetValue(results, null));
+            var emptyObjects = (from kv in resultObjects
+                                where kv.Value != null
+                                select kv).ToDictionary(kv => kv.Key, kv => kv.Value);
+            Dictionary<string, string> jsonResult = emptyObjects.ToDictionary(k => k.Key, k => k.Value.ToString());
+            return jsonResult;
+        }
+
+        //Post action for processing the PDF documents.
+        public IActionResult OnPostRenderPdfPages([FromBody] jsonObjects responseData)
+        {
+            PdfRenderer pdfviewer = new PdfRenderer(_cache);
+            var jsonObject = JsonConverterstring(responseData);
+            object jsonResult = pdfviewer.GetPage(jsonObject);
+            return Content(JsonConvert.SerializeObject(jsonResult));
+        }
+
+        //Post action for unloading and disposing the PDF document resources
+        public IActionResult OnPostUnload([FromBody] jsonObjects responseData)
+        {
+            PdfRenderer pdfviewer = new PdfRenderer(_cache);
+            var jsonObject = JsonConverterstring(responseData);
+            pdfviewer.ClearCache(jsonObject);
+            return this.Content("Document cache is cleared");
+        }
+
+        //Post action for rendering the ThumbnailImages
+        public IActionResult OnPostRenderThumbnailImages([FromBody] jsonObjects responseData)
+        {
+            PdfRenderer pdfviewer = new PdfRenderer(_cache);
+            var jsonObject = JsonConverterstring(responseData);
+            object result = pdfviewer.GetThumbnailImages(jsonObject);
+            return Content(JsonConvert.SerializeObject(result));
+        }
+
+        //Post action for processing the bookmarks from the PDF documents
+        public IActionResult OnPostBookmarks([FromBody] jsonObjects responseData)
+        {
+            PdfRenderer pdfviewer = new PdfRenderer(_cache);
+            var jsonObject = JsonConverterstring(responseData);
+            object jsonResult = pdfviewer.GetBookmarks(jsonObject);
+            return Content(JsonConvert.SerializeObject(jsonResult));
+        }
+
+        //Post action for rendering the annotation comments
+        public IActionResult OnPostRenderAnnotationComments([FromBody] jsonObjects responseData)
+        {
+            PdfRenderer pdfviewer = new PdfRenderer(_cache);
+            var jsonObject = JsonConverterstring(responseData);
+            object jsonResult = pdfviewer.GetAnnotationComments(jsonObject);
+            return Content(JsonConvert.SerializeObject(jsonResult));
+        }
+
+        //Post action for exporting the annotations
+        public IActionResult OnPostExportAnnotations([FromBody] jsonObjects responseData)
+        {
+            PdfRenderer pdfviewer = new PdfRenderer(_cache);
+            var jsonObject = JsonConverterstring(responseData);
+            string jsonResult = pdfviewer.ExportAnnotation(jsonObject);
+            return Content(jsonResult);
+        }
+
+        //Post action for importing the annotations
+        public IActionResult OnPostImportAnnotations([FromBody] jsonObjects responseData)
+        {
+            PdfRenderer pdfviewer = new PdfRenderer(_cache);
+            var jsonObject = JsonConverterstring(responseData);
+            string jsonResult = string.Empty;
+            object JsonResult;
+            if (jsonObject != null && jsonObject.ContainsKey("fileName"))
+            {
+                string documentPath = GetDocumentPath(jsonObject["fileName"]);
+                if (!string.IsNullOrEmpty(documentPath))
+                {
+                    jsonResult = System.IO.File.ReadAllText(documentPath);
+                }
+                else
+                {
+                    return this.Content(jsonObject["document"] + " is not found");
+                }
+            }
+            else
+            {
+                string extension = Path.GetExtension(jsonObject["importedData"]);
+                if (extension != ".xfdf")
+                {
+                    JsonResult = pdfviewer.ImportAnnotation(jsonObject);
+                    return Content(JsonConvert.SerializeObject(JsonResult));
+                }
+                else
+                {
+                    string documentPath = GetDocumentPath(jsonObject["importedData"]);
+                    if (!string.IsNullOrEmpty(documentPath))
+                    {
+                        byte[] bytes = System.IO.File.ReadAllBytes(documentPath);
+                        jsonObject["importedData"] = Convert.ToBase64String(bytes);
+                        JsonResult = pdfviewer.ImportAnnotation(jsonObject);
+                        return Content(JsonConvert.SerializeObject(JsonResult));
+                    }
+                    else
+                    {
+                        return this.Content(jsonObject["document"] + " is not found");
+                    }
+                }
+            }
+            return Content(jsonResult);
+        }
+
+        //Post action for downloading the PDF documents
+        public IActionResult OnPostDownload([FromBody] jsonObjects responseData)
+        {
+            PdfRenderer pdfviewer = new PdfRenderer(_cache);
+            var jsonObject = JsonConverterstring(responseData);
+            string documentBase = pdfviewer.GetDocumentAsBase64(jsonObject);
+            return Content(documentBase);
+        }
+
+        //Post action for printing the PDF documents
+        public IActionResult OnPostPrintImages([FromBody] jsonObjects responseData)
+        {
+            PdfRenderer pdfviewer = new PdfRenderer(_cache);
+            var jsonObject = JsonConverterstring(responseData);
+            object pageImage = pdfviewer.GetPrintImage(jsonObject);
+            return Content(JsonConvert.SerializeObject(pageImage));
+        }
+
+        //Gets the path of the PDF document
+        private string GetDocumentPath(string document)
+        {
+            string documentPath = string.Empty;
+            if (!System.IO.File.Exists(document))
+            {
+                string basePath = _hostingEnvironment.WebRootPath;
+                string dataPath = string.Empty;
+                dataPath = basePath + "/";
+                if (System.IO.File.Exists(dataPath + (document)))
+                    documentPath = dataPath + document;
+            }
+            else
+            {
+                documentPath = document;
+            }
+            return documentPath;
+        }
+    }
+
+    public class jsonObjects
+    {
+        public string document { get; set; }
+        public string password { get; set; }
+        public string zoomFactor { get; set; }
+        public string isFileName { get; set; }
+        public string xCoordinate { get; set; }
+        public string yCoordinate { get; set; }
+        public string pageNumber { get; set; }
+        public string documentId { get; set; }
+        public string hashId { get; set; }
+        public string sizeX { get; set; }
+        public string sizeY { get; set; }
+        public string startPage { get; set; }
+        public string endPage { get; set; }
+        public string stampAnnotations { get; set; }
+        public string textMarkupAnnotations { get; set; }
+        public string stickyNotesAnnotation { get; set; }
+        public string shapeAnnotations { get; set; }
+        public string measureShapeAnnotations { get; set; }
+        public string action { get; set; }
+        public string pageStartIndex { get; set; }
+        public string pageEndIndex { get; set; }
+        public string fileName { get; set; }
+        public string elementId { get; set; }
+        public string pdfAnnotation { get; set; }
+        public string importPageList { get; set; }
+        public string uniqueId { get; set; }
+        public string data { get; set; }
+        public string viewPortWidth { get; set; }
+        public string viewPortHeight { get; set; }
+        public string tilecount { get; set; }
+        public bool isCompletePageSizeNotReceived { get; set; }
+        public string freeTextAnnotation { get; set; }
+        public string signatureData { get; set; }
+        public string fieldsData { get; set; }
+        public string FormDesigner { get; set; }
+        public string inkSignatureData { get; set; }
+        public bool hideEmptyDigitalSignatureFields { get; set; }
+        public bool showDigitalSignatureAppearance { get; set; }
+        public bool digitalSignaturePresent { get; set; }
+        public string tileXCount { get; set; }
+        public string tileYCount { get; set; }
+        public string digitalSignaturePageList { get; set; }
+        public string annotationCollection { get; set; }
+        public string annotationsPageList { get; set; }
+        public string formFieldsPageList { get; set; }
+        public bool isAnnotationsExist { get; set; }
+        public bool isFormFieldAnnotationsExist { get; set; }
+        public string documentLiveCount { get; set; }
+        public string annotationDataFormat { get; set; }
+        public string importedData { get; set; }
+    }
+}

How to/Custom Fonts/Pages/Privacy.cshtml

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