How to make a Hello World on ASP.NET MVC?

Question

I already program but I’m starting with C# and ASP.NET MVC. I wanted to do a program Hello World and gradually add things as I’ve always done with any language I’ve learned.

I thought creating a project in Visual Studio would create a Hello World. but he created an entire application, has several folders, over 200 files, and that’s pretty crazy.

I wanted something very simple I know I can’t do just one Console.Write("Hello World"), but what would be the simplest possible MVC code? I wanted to have very small codes and with few files, I wanted a very small project, almost empty.

All the research I do gives very large codes.

Answer 1

To create a simple structure for an ASP.NET MVC site

The simplest for a Hello World.

Some folders are mandatory, such as Controllers, Models and Views folders.

I’m using Visual Studio 2013 Express for Web.

Create a new ASP.Net Web Application project:

Add basic MVC references (libraries, Global.asax, Routeconfig, etc.)

As a result, you will have a very basic Solution. One that if you run F5, will not display any page, because there are no pages, but there is the application Asp.NET. See how the structure looks:

No views, no controls, no script folder (where we usually have javascript files) and no image folder, ie no files "unnecessary".

To create a Hello World with a View

Now just create a new Controller :

I use the MVC 5 Controller - Empty

See that a controller was created, which I called Defaultcontroller, very simple:

Now we have a Controller with an action called Index, but we still need to create a view for this Action. To do this, just right-click on the Action Index and choose Add View. Fill the screen below: As a result you have a cshtml file that is the view of the Controller Defaultcontroller’s Index action.

Now just start debug, F5, and you’ll see a beautiful blank page. To include Hello World, simply write in the HTML file Index.cshtml the word Hello World.

If I don’t even want to create a View for my Hello World

If you don’t even want to have a View file, you can choose to do a Hello World as Laerte demonstrated in its reply:

public string HelloWorld()
{
    return "Hello World";
}

So just start the application and navigate to http://localhost:<suaPorta>/Default/HelloWorld

Answer 2

With Visual Studio open press: Ctrl + Shift + J or can simply create a New Project, select the Web tab and select the ASP MVC 4 Web Application as shown in the following image: Then in the next window you choose Internet Application, with the Homecontroller file opened you will add the code below, as shown in the image, then just run the program and access the method by URL.

By default when you create a ASP MVC Web Application, it also creates a standard Controller ("Homecontroller"), you can create a Action which is a method within the Controller:

public string HelloWorld()
{
    return "Hello World";
}

So just access the URL from your local server: /Home/Helloworld and you’ll see on the screen.

Answer 3

MVC is not something specific to ASP.NET, so much so that it is totally possible to work without MVC, because it is not a requirement, it is only a standard project software. To get a sense of this you see that there are other types of "patterns":

• MVP Model View Presenter
• MVVM Model View Viewmodel

In languages like PHP, who does not use framework, will rarely use MVC, but this is not the issue of language.

It is almost impossible to create an MVC (in your case it looks like a MVC and Routes) with 3 files on Asp.net mvc as you requested, as it is necessary several settings, as an example the file Web.config and all these files to which you refer, are parts of the settings necessary for everything to work and you is not required to understand one by one.

Therefore the minimum possible yet yes will still generate many files (emphasizing: you are not obliged to understand the meaning of each of them).

I’ll be honest I even understand you, I’m very similar, I like to be in "control", avoid letting Ides do my job (I think that’s how you think), but unfortunately there doesn’t seem to be enough clear material on how to create your own MVC (that works with "routes" of course), at first edit the file HomeController.cs would be the right thing to do, but if you really need alternatives, I believe this can help you:

• Asp.net from scratch
• aspx migration to mvc (I haven’t tested)

Note: Unfortunately in Portuguese I was unable to find anything.

If you want to try MVVM:

• Asp.net mvc mvvm creating a product session

Answer 4

You created a MVC Web project. Start with a simple Class Library.

Take a look at this tutorial from Microsoft Hello World Tutorial.

And if you want to get off to a really good start, study the new ASP.NET vNext, you will need to download the Visual Studio 2015 Preview or the KVM. He (Visual Studio) also has a Class Library project and will help you work with new ways to recover dependencies. (Bower and Grunt as JS Task Runner)