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you're using Visual Studio, you'll need to open the .csproj
project file directly. Visual Studio will later prompt you to save the
Solution file, which you should save in the root directory (the first
AspNetCoreTodo folder). You can also create an ASP.NET Core
project directly within Visual Studio using the templates in File -
New Project.
A note about Git
If you use Git or GitHub to manage your source code, now is a good time
to do git init and initialize a Git repository in the project root
directory:
cd ..
git init
Make sure you add a .gitignore file that ignores the bin and obj
directories. The Visual Studio template on GitHub's gitignore template
repo (https://github.com/github/gitignore) works great.
18
Create an ASP.NET Core project
There's plenty more to explore, so let's dive in and start building an
application!
19
MVC basics
MVC basics
In this chapter, you'll explore the MVC system in ASP.NET Core. MVC
(Model-View-Controller) is a pattern for building web applications that's
used in almost every web framework (Ruby on Rails and Express are
popular examples), plus frontend JavaScript frameworks like Angular.
Mobile apps on iOS and Android use a variation of MVC as well.
As the name suggests, MVC has three components: models, views, and
controllers. Controllers handle incoming requests from a client or web
browser and make decisions about what code to run. Views are
templates (usually HTML plus a templating language like Handlebars,
Pug, or Razor) that get data added to them and then are displayed to the
user. Models hold the data that is added to views, or data that is entered
by the user.
A common pattern for MVC code is:
The controller receives a request and looks up some information in a
database
The controller creates a model with the information and attaches it
to a view
The view is rendered and displayed in the user's browser
The user clicks a button or submits a form, which sends a new
request to the controller, and the cycle repeats
If you've worked with MVC in other languages, you'll feel right at home
in ASP.NET Core MVC. If you're new to MVC, this chapter will teach you
the basics and will help get you started.
What you'll build
20
MVC basics
The "Hello World" exercise of MVC is building a to-do list application. It's
a great project since it's small and simple in scope, but it touches each