Getting started with Blazor ASP.NET Core Hosted App in .NET CLI

30 Nov 20234 minutes to read

This articles provides a step-by-step instructions for building Blazor ASP.NET Core Hosted WebAssembly application with Blazor Calendar components using .NET CLI.


Latest version of the .NET Core SDK. If you previously installed the SDK, you can determine the installed version by executing the following command in a command prompt (Windows) or terminal (macOS) or command shell (Linux).

dotnet --version

Create a Blazor ASP.NET Core Hosted WebAssembly project using .NET CLI

Run the dotnet new blazorwasm command with option -ho or --hosted to create a new Blazor ASP.NET Core Hosted WebAssembly application in the command prompt (Windows) or terminal (macOS) or command shell (Linux).

dotnet new blazorwasm -o BlazorApp --hosted
cd BlazorApp

This command creates new Blazor WebAssembly App project and places it in a new directory called BlazorApp inside your current location. See Create Blazor App topic and dotnet new CLI command topics for more details.


If you have installed multiple SDK versions and need any specific framework version (.net6.0/.net7.0) project, then add -f flag along with dotnet new blazorwasm comment. Refer here for the available options.

Install Syncfusion Blazor Calendars and Themes NuGet in the App

Here’s an example of how to add Blazor Calendar component in the application using the following command in the command prompt (Windows) or terminal (Linux and macOS) to install a Syncfusion.Blazor.Calendars and Syncfusion.Blazor.Themes NuGet package. See Install and manage packages using the dotnet CLI topics for more details.

dotnet add package Syncfusion.Blazor.Calendars -Version 26.1.35
dotnet add package Syncfusion.Blazor.Themes -Version 26.1.35
dotnet restore


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

Register Syncfusion Blazor Service

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

@using Syncfusion.Blazor
@using Syncfusion.Blazor.Calendars

Now, Open the ~/Program.cs file and register the Syncfusion Blazor Service in the client web app.

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

var builder = WebAssemblyHostBuilder.CreateDefault(args);

builder.Services.AddScoped(serviceProvider => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });

await builder.Build().RunAsync();

Add stylesheet and script resources

The theme stylesheet and script can be accessed from NuGet through Static Web Assets. Reference the stylesheet and script in the <head> of the main page as follows:

  • For Blazor WebAssembly app, include it in the ~/index.html file.
    <link href="_content/Syncfusion.Blazor.Themes/bootstrap5.css" rel="stylesheet" />
    <script src="_content/Syncfusion.Blazor.Core/scripts/syncfusion-blazor.min.js" type="text/javascript"></script>


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 component

Add the Syncfusion Blazor Calendar component in the ~/Pages/Index.razor file.

<SfCalendar TValue="DateTime" />
  • In the command prompt (Windows) or terminal (Linux and macOS) to run the following command to build and start the app. The app listening on http://localhost:<port number> and view it in the browser.
dotnet run

Blazor Calendar Component


For Blazor ASP.NET Core Hosted WebAssembly application, the Server[BlazorApp.Server] project should be the startup project.

See also