Getting Started with Blazor PDF Viewer Component in Blazor Server App

10 Aug 20226 minutes to read

This section briefly explains about how to integrate Blazor PDF Viewer component in your Blazor Server App using Visual Studio.

Prerequisites

Integrate PDF Viewer into Blazor Server App

  1. Start Visual Studio and select Create a new project.
  2. For a Blazor Server experience, choose the Blazor Server App template. Select Next.
    Create-new-blazor-server-app
  3. Provide a Project Name and confirm that the Location is correct. Select Next.
    Set-project-name
  4. In the Additional information dialog, set the target framework.
    Set-target-framework

Install Blazor PDF Viewer NuGet package in Blazor Server App

To add Blazor PDF Viewer component in Blazor Server App, use SfPdfViewerServer component in corresponding NuGet based on the operating system of the server you intend to host, as shown below.,

Register Syncfusion Blazor Service

Open ~/_Imports.razor file and import the Syncfusion.Blazor namespace.

@using Syncfusion.Blazor

Now, register the Syncfusion Blazor Service in the Blazor Server App. Here, Syncfusion Blazor Service is registered by setting IgnoreScriptIsolation property as true to load the scripts externally in the next steps.

From 2022 Vol1 (20.1) version - The default value of IgnoreScriptIsolation is changed as true, so, you don’t have to set IgnoreScriptIsolation property explicitly to refer scripts externally.

  • For .NET 6 app, open the ~/Program.cs file and register the Syncfusion Blazor Service.

  • For .NET 5 and .NET 3.X app, open the ~/Startup.cs file and register the Syncfusion Blazor Service.

using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Web;
using Syncfusion.Blazor;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddRazorPages();
builder.Services.AddServerSideBlazor().AddHubOptions(o => { o.MaximumReceiveMessageSize = 102400000; });
builder.Services.AddSyncfusionBlazor(options => { options.IgnoreScriptIsolation = true; });

var app = builder.Build();
....
using Syncfusion.Blazor;

namespace BlazorApplication
{
    public class Startup
    {
        ...
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddRazorPages();
            services.AddServerSideBlazor();
            services.AddSyncfusionBlazor(options => { options.IgnoreScriptIsolation = true; });
        }
        ...
    }
}

Add Style Sheet

To add theme to the app, open the NuGet package manager in Visual Studio (Tools → NuGet Package Manager → Manage NuGet Packages for Solution), search for Syncfusion.Blazor.Themes and then install it. Then, the theme style sheet from NuGet can be referred as follows,

  • For .NET 6 app, add the Syncfusion bootstrap5 theme in the <head> of the ~/Pages/_Layout.cshtml file.

  • For .NET 5 and .NET 3.X app, add the Syncfusion bootstrap5 theme in the <head> of the ~/Pages/_Host.cshtml file.

<head>
    <link href="_content/Syncfusion.Blazor.Themes/bootstrap5.css" rel="stylesheet" />
</head>
<head>
    <link href="_content/Syncfusion.Blazor.Themes/bootstrap5.css" rel="stylesheet" />
</head>

NOTE

Checkout the Blazor Themes topic to learn different ways (Static Web Assets, CDN and CRG) to refer themes in Blazor application, and to have the expected appearance for Syncfusion Blazor components. Here, the theme is referred using Static Web Assets. Refer to Enable static web assets usage topic to use static assets in your project.

Add Script Reference

In this getting started walk-through, the required scripts are referred using Static Web Assets externally inside the <head> as follows. Refer to Enable static web assets usage topic to use static assets in your project.

  • For .NET 6 app, Refer script in the <head> of the ~/Pages/_Layout.cshtml file.

  • For .NET 5 and .NET 3.X app, Refer script in the <head> of the ~/Pages/_Host.cshtml file.

<head>
    ....
    <link href="_content/Syncfusion.Blazor.Themes/bootstrap5.css" rel="stylesheet" />
    <script src="_content/Syncfusion.Blazor.PdfViewer/scripts/syncfusion-blazor-pdfviewer.min.js" type="text/javascript"></script>
</head>
<head>
    ....
    <link href="_content/Syncfusion.Blazor.Themes/bootstrap5.css" rel="stylesheet" />
    <script src="_content/Syncfusion.Blazor.PdfViewer/scripts/syncfusion-blazor-pdfviewer.min.js" type="text/javascript"></script>
</head>

NOTE

Checkout Adding Script Reference topic to learn different ways to add script reference in Blazor Application.

Syncfusion recommends to reference scripts using Static Web Assets, CDN and CRG by disabling JavaScript isolation for better loading performance of the Blazor application.

Add Blazor PDF Viewer Component

  • Open ~/_Imports.razor file or any other page under the ~/Pages folder where the component is to be added and import the Syncfusion.Blazor.PdfViewer namespace.
@using Syncfusion.Blazor
@using Syncfusion.Blazor.PdfViewerServer
  • Now, add the Syncfusion PDF Viewer component in razor file. Here, the PDF Viewer component is added in the ~/Pages/Index.razor file under the ~/Pages folder.
<SfPdfViewerServer DocumentPath="@DocumentPath" Height="500px" Width="1060px" ></SfPdfViewerServer>

@code{
private string DocumentPath { get; set; } = "wwwroot/Data/PDF_Succinctly.pdf";
}

If the DocumentPath property value is not provided, the PDF Viewer component will be rendered without loading the PDF document. The users can then use the open option from the toolbar to browse and open the PDF as required.

Press Ctrl+F5 (Windows) or +F5 (macOS) to run the application. Then, the Syncfusion Blazor PDF Viewer component will be rendered in the default web browser.

Blazor PDFViewer Component

View Sample in GitHub.