# Getting Started

# Quick start

If you already have the .NET Core SDK version 3.1 or 5.0+ installed, run the following sequence of command line steps:

dotnet new -i Ext.NET.Templates  # Install dotnet templates
mkdir ExtDemo1                   # Make a new folder
cd ExtDemo1                      # Move into that new folder
dotnet new extnet                # Create a new Ext.NET app
dotnet watch run                 # Start the new web app

Within seconds, your new app should be available at http://localhost:5000.

Here's a Getting Started video demonstrating how to install the Ext.NET Template and create a new web app using the above commands.

# Installation options

There are several options for quickly creating new Ext.NET Classic projects by using Templates, the Visual Studio Extension, or adding Ext.NET to your project using NuGet packages.

  1. Install the dotnet templates (details), or
  2. Install the VSIX Extension for Visual Studio (details), or
  3. Add the NuGet packages to your project (details)

We'll run through each of these setup techniques, although which to choose will depend on your requirements and personal preference. We use the dotnet command-line templates and Visual Studio Templates almost exclusively, so it would be our recommendation to start with either of the first two options detailed below.

# Install dotnet CLI templates

With multi-platform support, including Windows and Mac OS, the dotnet CLI is a handy collection of tools for creating, compiling, running, and publishing .NET applications. With one simple command, Ext.NET can be installed into that toolbox.

We're making the assumption here that you already have .NET Core installed locally, but if not, download and install .NET Core 3.1 SDK first. The dotnet CLI is installed automatically during that process.

With .NET Core installed on your local machine, open a Command-Line or Mac OS Terminal window, run the following command to install the Ext.NET Templates:

dotnet new --install Ext.NET.Templates

Two new project templates will be installed, extnet and extnet-mvc.

The extnet template will create a basic Razor Pages project with Ext.NET installed. The extnet-mvc template creates the same Ext.NET application but with an ASP.NET MVC (Model-View-Controller) project layout.

Templates                      Short Name    Language    Tags
Ext.NET MVC Web App            extnet-mvc    [C#]        Ext.NET/Web/MVC
Ext.NET Razor Pages Web App    extnet        [C#]        Ext.NET/Web/Razor Pages

The next step is to create a new folder for your project and move into that folder:

mkdir Demo1
cd Demo1

With those few simple commands, we're now ready to create a new Ext.NET web app from our newly installed templates and open the app in a web browser.

dotnet new extnet
dotnet watch run

Your new Ext.NET project is now created and the localhost webserver is running.

The above dotnet watch run command will start a local webserver at http://localhost:5000. You can now view the app in a web browser and your new Ext.NET web app should be working correctly.

To view the new project source code, open the project in Visual Studio, or run the code . command to open with Visual Studio Code.

code .

For creating another new app, just create a new folder somewhere then run one command:

dotnet new extnet && dotnew watch run

Within seconds your new Ext.NET project is created and running on a local webserver.

# Tips

Do you already have the Ext.NET dotnet tools installed? Upgrading to the latest release of Ext.NET is oh so simple, just run the same command:

dotnet new --install Ext.NET.Templates

The templates can be removed by running the following command:

dotnet new --uninstall Ext.NET.Templates

The version number of your installed dotnet templates can be retrieved using:

dotnet new -u

# Install VSIX Visual Studio Extension

The VSIX project template installer is available from the Ext.NET download page or the Visual Studio Marketplace. Running the installer will add the two Ext.NET project templates into your Visual Studio File > New > Project... menu.

Once installed, two new Project templates will be available in Visual Studio:

VSIX create new project

The Visual Studio project templates can also be installed from within Visual Studio using Extensions > Manage Extensions, then searching for Ext.NET. A few clicks and the new project templates will be available.

VS manage extensions

# Add using NuGet

Ext.NET Classic can be installed into your project using NuGet, although as outlined below, some manual configuration of your projects Startup.cs and _ViewImports.cshtml files are required.

In general, the easiest way to get started is by installing the dotnet Ext.NET Templates or VSIX installer for Visual Studio (Windows only).

# NuGet

Install Ext.NET Classic NuGet package using the NuGet CLI.

Install-Package Ext.NET.Classic

# dotnet CLI

Install Ext.NET Classic NuGet package using the dotnet CLI.

dotnet add package Ext.NET.Classic

# Project setup

Within your ASP.NET Core web project, a few configuration options must be included.

After installing the Ext.NET.Classic package using NuGet or the dotnet CLI, please add the following individual Ext.Net related configurations within your projects Startup.cs file:

// 1. Add the following using statements:
using Ext.Net;
using Ext.Net.Core;
using Westwind.AspNetCore.LiveReload;

namespace Your_Namespace_Here
    public class Startup
        public Startup(IConfiguration configuration)
            Configuration = configuration;

        public IConfiguration Configuration { get; }

        public void ConfigureServices(IServiceCollection services)
            // Optional to include LiveReload service
            // See https://github.com/RickStrahl/Westwind.AspnetCore.LiveReload

            // 2. Register Ext.NET services

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
            // Optional LiveReload
            if (env.IsDevelopment())

            // 3. Use Ext.NET resources
            //    To be added prior to app.UseStaticFiles()
            app.UseExtNetResources(config =>
                if (env.IsDevelopment())


            // 4. Enable Ext.NET localization [not required]
            //    If included, localization will be handled automatically
            //    based on client browser preferences


            // 5. Ext.NET middleware
            //    To be added prior to app.UseEndpoints()
            app.UseExtNet(config =>
                config.Theme = ThemeKind.Spotless;

            app.UseEndpoints(endpoints =>
                endpoints.MapControllers(); // If MVC
                endpoints.MapRazorPages();  // If Razor

Additional details for configuring app.UseExtNetLocalization() are available in the Localization guide.

Your projects _ViewImports.cshtml file requires the addition of a few items as well.

@using Ext.Net
@using Ext.Net.Core
@using Ext.Net.HtmlHelpers
@using Ext.Net.HtmlHelpers.Charts

@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

@removeTagHelper Microsoft.AspNetCore.Mvc.Razor.TagHelpers.UrlResolutionTagHelper, Microsoft.AspNetCore.Mvc.Razor

@addTagHelper Ext.Net.TagHelpers.*, Ext.Net
@addTagHelper Ext.Net.TagHelpers.*, Ext.Net.Core
@addTagHelper Ext.Net.TagHelpers.*, Ext.Net.Charts

Once installed, you should now have access to all Ext.NET components, the entire Ext.NET API, and Intellisense.

Try adding a simple <ext-button> to a page:

<ext-button text="Click Me!" handler="Ext.toast('Hello, world')" />

Check out the download page for links to all installation options and previous releases.