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title | author | description | monikerRange | ms.author | ms.custom | ms.date | uid |
---|---|---|---|---|---|---|---|
Get started with ASP.NET Core | tdykstra | A short tutorial using the .NET CLI to create and run a basic Hello World app using ASP.NET Core. | >= aspnetcore-3.1 | tdykstra | mvc | 03/07/2022 | getting-started |
Tutorial: Get started with ASP.NET Core
This tutorial shows how to create and run an ASP.NET Core web app using the .NET Core CLI.
You'll learn how to:
[!div class="checklist"]
- Create a web app project.
- Trust the development certificate.
- Run the app.
- Edit a Razor page.
At the end, you'll have a working web app running on your local machine.
:::image source="_static/home-page.png" alt-text="Web app home page":::
Prerequisites
:::moniker range=">= aspnetcore-7.0" [!INCLUDE] :::moniker-end :::moniker range=">= aspnetcore-6.0 < aspnetcore-7.0" [!INCLUDE] :::moniker-end :::moniker range=">= aspnetcore-5.0 < aspnetcore-6.0" [!INCLUDE] :::moniker-end :::moniker range="< aspnetcore-5.0" [!INCLUDE] :::moniker-end
Create a web app project
Open a command shell, and enter the following command:
dotnet new webapp -o aspnetcoreapp
The preceding command:
- Creates a new web app.
- The
-o aspnetcoreapp
parameter creates a directory namedaspnetcoreapp
with the source files for the app.
Trust the development certificate
Trust the HTTPS development certificate:
Windows
dotnet dev-certs https --trust
The preceding command displays the following dialog:
:::image source="~/getting-started/_static/cert.png" alt-text="Security warning dialog":::
Select Yes if you agree to trust the development certificate.
macOS
dotnet dev-certs https --trust
The preceding command displays the following message:
Trusting the HTTPS development certificate was requested. If the certificate isn't already trusted, we'll run the following command: 'sudo security add-trusted-cert -d -r trustRoot -k /Library/Keychains/System.keychain <<certificate>>'
This command might prompt you for your password to install the certificate on the system keychain. Enter your password if you agree to trust the development certificate.
Linux
See the documentation for your Linux distribution on how to trust the HTTPS development certificate.
For more information, see Trust the ASP.NET Core HTTPS development certificate
Run the app
Run the following commands:
cd aspnetcoreapp
dotnet watch run
After the command shell indicates that the app has started, browse to https://localhost:{port}
, where {port}
is the random port used.
Edit a Razor page
Open Pages/Index.cshtml
and modify and save the page with the following highlighted markup:
:::code language="cshtml" source="sample/index.cshtml" highlight="9":::
Browse to https://localhost:{port}
, refresh the page, and verify the changes are displayed.
Next steps
In this tutorial, you learned how to:
[!div class="checklist"]
- Create a web app project.
- Trust the development certificate.
- Run the project.
- Make a change.
To learn more about ASP.NET Core, see the following:
[!div class="nextstepaction"] xref:index#recommended-learning-path