Getting Started with Blazor Web App

16 Apr 202511 minutes to read

This article provides a step-by-step instructions for building Blazor Web App with Blazor Accordion component using Visual Studio and Visual Studio Code.

To get start quickly with Blazor Web App, you can check on this video.

Using Playground

Blazor Playground allows you to interact with our Blazor components directly in your web browser without need to install any required NuGet packages. By default, the Syncfusion.Blazor package is included in this.

Using Syncfusion Blazor Templates

You can create a Blazor Web App using Syncfusion Blazor Templates in both Visual Studio and Visual Studio Code.

Manually Creating a Project

This section provides a brief explanation on how to manually create a Blazor Web App using either Visual Studio or Visual Studio Code.

Prerequisites

Create a new Blazor Web App in Visual Studio

You can create a Blazor Web App using Visual Studio 2022 via Microsoft Templates or the Syncfusion® Blazor Extension.

You need to configure the corresponding Interactive render mode and Interactivity location while creating a Blazor Web Application.

Install Syncfusion® Blazor Navigations and Themes NuGet in the Blazor Web App

Here’s an example of how to add Blazor Accordion component in the app, open the NuGet package manager in Visual Studio (Tools → NuGet Package Manager → Manage NuGet Packages for Solution), search and install Syncfusion.Blazor.Navigations and Syncfusion.Blazor.Themes.

If you utilize WebAssembly or Auto render modes in the Blazor Web App need to be install Syncfusion® Blazor components NuGet packages within the client project.

Alternatively, you can utilize the following package manager command to achieve the same.

Install-Package Syncfusion.Blazor.Navigations -Version 29.1.33
Install-Package Syncfusion.Blazor.Themes -Version 29.1.33

NOTE

Syncfusion® Blazor components are available in nuget.org. Refer to NuGet packages topic for available NuGet packages list with component details.

Prerequisites

Render Interactive Modes

If you set the Authentication Type as None and Interactivity location as Per page/component, you need to use the following command.

Interactive Render Mode Command
Server
  • C#
    • dotnet new blazor -o BlazorApp -int Server
    WebAssembly
  • C#
    • dotnet new blazor -o BlazorApp -int WebAssembly
    Auto
  • C#
    • dotnet new blazor -o BlazorApp -int Auto
    None
  • C#
    • dotnet new blazor -o BlazorApp -int None

    If you set the Authentication Type as Individual Accounts and Interactivity location as Per page/component, you need to use the following command.

    Interactive Render Mode Command
    Server
  • C#
    • dotnet new blazor -o BlazorApp -au Individual -int Server
    WebAssembly
  • C#
    • dotnet new blazor -o BlazorApp -au Individual -int WebAssembly
    Auto
  • C#
    • dotnet new blazor -o BlazorApp -au Individual -int Auto
    None
  • C#
    • dotnet new blazor -o BlazorApp -au Individual -int None

    If you set the Authentication Type as Individual Accounts and Interactivity location as Global, you need to use the following command.

    Interactive Render Mode Command
    Server
  • C#
    • dotnet new blazor -o BlazorApp -au Individual -int Server -ai
    WebAssembly
  • C#
    • dotnet new blazor -o BlazorApp -au Individual -int WebAssembly -ai
    Auto
  • C#
    • dotnet new blazor -o BlazorApp -au Individual -int Auto -ai
    None
  • C#
    • dotnet new blazor -o BlazorApp -au Individual -int None -ai

    If you set the Authentication Type as None and Interactivity location as Global, you need to use the following command.

    Interactive Render Mode Command
    Server
  • C#
    • dotnet new blazor -o BlazorApp -int Server-ai
    WebAssembly
  • C#
    • dotnet new blazor -o BlazorApp -int WebAssembly -ai
    Auto
  • C#
    • dotnet new blazor -o BlazorApp8 -int Auto -ai
    None
  • C#
    • dotnet new blazor -o BlazorApp8 -int None -ai

    NOTE

    If you want to see more available templates, you need to run the dotnet new blazor --help or dotnet new blazor -h command.

    Create a new Blazor Web App in Visual Studio Code

    You can create a Blazor Web App using Visual Studio Code via Microsoft Templates or the Syncfusion® Blazor Extension.

    You need to configure the corresponding Interactive render mode and Interactivity location while creating a Blazor Web Application.

    For example, in a Blazor Web App with the Auto interactive render mode, use the following commands.

    dotnet new blazor -o BlazorWebApp -int Auto
cd BlazorWebApp
cd BlazorWebApp.Client

    Install Syncfusion® Blazor Navigations and Themes NuGet in the App

    If you utilize WebAssembly or Auto render modes in the Blazor Web App need to be install Syncfusion® Blazor components NuGet packages within the client project.

    • Press Ctrl+` to open the integrated terminal in Visual Studio Code.
    • Ensure you’re in the project root directory where your .csproj file is located.
    • Run the following command to install a Syncfusion.Blazor.Navigations and Syncfusion.Blazor.Themes NuGet package and ensure all dependencies are installed.
    dotnet add package Syncfusion.Blazor.Navigations -v 29.1.33
dotnet add package Syncfusion.Blazor.Themes -v 29.1.33
dotnet restore

    NOTE

    Syncfusion® Blazor components are available in nuget.org. Refer to NuGet packages topic for available NuGet packages list with component details.

    Register Syncfusion® Blazor Service

    Interactive Render Mode Description
    WebAssembly or Auto Open ~/_Imports.razor file from the client project.
    Server Open ~/_import.razor file, which is located in the `Components` folder.

    Import the Syncfusion.Blazor and Syncfusion.Blazor.Navigations namespace.

    @using Syncfusion.Blazor
@using Syncfusion.Blazor.Navigations

    Now, register the Syncfusion® Blazor Service in the ~/Program.cs file of your Blazor Web App.

    If the Interactive Render Mode is set to WebAssembly or Auto, you need to register the Syncfusion® Blazor service in both ~/Program.cs files of your Blazor Web App.

    ...
...
using Syncfusion.Blazor;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddRazorComponents()
    .AddInteractiveServerComponents()
    .AddInteractiveWebAssemblyComponents();
builder.Services.AddSyncfusionBlazor();

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

var builder = WebAssemblyHostBuilder.CreateDefault(args);
builder.Services.AddSyncfusionBlazor();

await builder.Build().RunAsync();

    If the Interactive Render Mode is set to Server, your project will contain a single ~/Program.cs file. So, you should register the Syncfusion® Blazor Service only in that ~/Program.cs file.

    ...
using Syncfusion.Blazor;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddRazorComponents()
    .AddInteractiveServerComponents();
builder.Services.AddSyncfusionBlazor();

var app = builder.Build();
....

    Add stylesheet and script resources

    The theme stylesheet and script can be accessed from NuGet through Static Web Assets. Include the stylesheet reference in the <head> section and the script reference at the end of the <body> in the ~/Components/App.razor file as shown below:

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

<body>
    ....
    <script src="_content/Syncfusion.Blazor.Core/scripts/syncfusion-blazor.min.js" type="text/javascript"></script>
</body>

    NOTE

    Check out the Blazor Themes topic to discover various methods (Static Web Assets, CDN, and CRG) for referencing themes in your Blazor application. Also, check out the Adding Script Reference topic to learn different approaches for adding script references in your Blazor application.

    Add Syncfusion® Blazor Accordion component

    Add the Syncfusion® Blazor Accordion component in the ~/Components/Pages/*.razor file. If an interactivity location as Per page/component in the web app, define a render mode at the top of the ~Pages/*.razor component, as follows:

    Interactivity location RenderMode Code
    Per page/component Auto @rendermode InteractiveAuto
    WebAssembly @rendermode InteractiveWebAssembly
    Server @rendermode InteractiveServer
    None ---

    NOTE

    If an Interactivity Location is set to Global and the Render Mode is set to Auto or WebAssembly or Server, the render mode is configured in the App.razor file by default.

    @* desired render mode define here *@
@rendermode InteractiveAuto
    <SfAccordion>
    <AccordionItems>
        <AccordionItem Header="Margeret Peacock" Content="Margeret Peacock was born on Saturday , 01 December 1990. Now lives at Coventry House Miner Rd., London,UK. Margeret Peacock holds a position of Sales Coordinator in our WA department, (Seattle USA). Joined our company on Saturday , 01 May 2010"></AccordionItem>
        <AccordionItem Header="Laura Callahan" Content="Laura Callahan was born on Tuesday , 06 November 1990. Now lives at Edgeham Hollow Winchester Way, London,UK. Laura Callahan holds a position of Sales Coordinator in our WA department, (Seattle USA). Joined our company on Saturday , 01 May 2010"></AccordionItem>
        <AccordionItem Header="Albert Dodsworth" Content="Albert Dodsworth was born on Thursday , 19 October 1989. Now lives at 4726 - 11th Ave. N.E., Seattle,USA.Albert Dodsworth holds a position of Sales Representative in our WA department, (Seattle USA). Joined our company on Friday , 01 May 2009"></AccordionItem>
    </AccordionItems>
</SfAccordion>
    • Press Ctrl+F5 (Windows) or ⌘+F5 (macOS) to launch the application. This will render the Syncfusion® Blazor Accordion component in your default web browser.

    Blazor Accordion Component