Your First ASP.NET Web Application: How to Get Started


ASP.NET is Microsoft’s free cross-platform framework for building web applications and services. The ASP.NET platform is an extension of .NET, a platform for developing tools, programming languages, and libraries used to build various applications.

As you have probably guessed, ASP.NET is a fantastic framework that beginners can use to build web applications. It offers a lot of flexibility and is easy to use. In this article, we’ll help you build your first web application in ASP.NET using Microsoft Visual Studio.

What is ASP.NET?

ASP stands for “Active Server Pages”; ASP and ASP.NET are server-side technologies used to display interactive web pages. ASP.NET offers developers a lot of flexibility in a large and versatile ecosystem with various libraries and tools. Developers can also create custom libraries that they can share with any application built on the .NET platform.

Related: Web Frameworks Worth Learning For Developers

You can write the main code for your ASP.NET applications in C #, Visual Basic, or even F #. This flexibility allows developers to efficiently code the business logic and the data access layer. Another great benefit of using ASP.NET is creating dynamic web pages using C # using a web page template syntax tool known as Razor.

Razor also provides syntax for creating interactive dynamic web pages incorporating HTML, CSS, JavaScript, and C #. Client-side code is typically written in JavaScript, and ASP.NET can even be integrated with other web frameworks such as Angular or React.

Related: Tailwind CSS vs Bootstrap: Which is the Best Framework?

ASP.NET also provides developers with an authentication system that includes database, libraries, login management templates, authentication external to Google, Facebook, etc., etc. Developers can use ASP.NET on all major platforms, including Windows, Linux, macOS, and even Docker.

How to Create an ASP.NET Web Application in Visual Studio

Before building a web application, it is best to familiarize yourself with HTML, CSS, JavaScript, and C #, in order to get the most out of ASP.NET. Let’s see how to create a web application in ASP.NET in Microsoft Visual Studio 2019.

Make sure the following software packages are installed:

  • Microsoft Visual Studio 2019 or higher

  • ASP.NET and Web Development Workload from Visual Studio Installer

Understand the components of the ASP.NET Web Application project

Before you can start developing your web application, it is essential to understand the essential components of ASP.NET and how to use them in your web application.

In this tutorial, we will use ASP.NET web forms to create the individual web pages such as Home page, Contact Us, etc. Each web form has three main components, an .aspx file for HTML / CSS, an .aspx file for .cs code file, and an .aspx.designer.cs file. We will be working mainly in the .aspx and .aspx.cs files for this tutorial.

code in an IDE

The .aspx file will contain all of the HTML and CSS code for your web pages. Make sure to use asp tags rather than HTML tags, as asp tags retrieve data from the server and send the input data to the server. This is the required feature characteristic in a dynamic web application.

The .aspx.cs file contains the C # code for your web pages, and it controls what happens when a particular event such as a web page is loaded, a button is clicked, etc. You can create separate functions for each function and link them to the appropriate asp tag in the corresponding .aspx file.

Master pages are beneficial for developers and add essential components like navigation bar and footer to every web page. Instead of adding the same code over and over, developers can add all the code required by the template into a master page, and then link each web page to the master page. We’ll show you how to do this in the following sections.

Create a new ASP.NET Web Application project

The first step in creating a web application in ASP.NET is to select a project template and create a new web application:

create a new web project

  1. Launch Microsoft Visual Studio and click Create a new project

  2. Type ASP.NET in the template search box, select ASP.NET Web Application (.NET Framework) and click Next. You will not get this model if you do not have the required installations mentioned in the previous section.

  3. In the next screen, configure the name and directory of your project and click on Next.

  4. Visual Studio will now create your template project, and you should be able to run the template app by clicking the green play button at the top of the screen.

Create a new ASP.NET web form


To help you better understand ASP.NET, we’re going to create a simple product page for a play store. The first step is to create a new web form. In the project you created earlier, navigate to File> New> File and select Web form. Once you’ve set it up, you should be able to see a blank .aspx file with just the header code.

To start developing the overall look of your web page, you can either use the HTML / CSS code yourself or use a template from Tailblocks.


We have configured the above product layout using a template. It displays a product image, product details, and a navigation bar. We added HTML and CSS for the navigation bar using the master page.

aspx.cs file function

In the code above (.aspx.cs file) we have configured the loading page function to define the details of the product in our reserved areas. You can create similar functions to login, register, add to cart, etc.

An example of an asp tag to display the product description is as follows:

The C # code description value will be displayed in this placeholder. You can also use the Visual Studio toolbox to add display elements like images, buttons, radio buttons, etc. There are several resources available online where you can learn ASP.NET syntax.

ASP.NET Web Application for Beginners

ASP.NET is a powerful platform for building web applications and services. You should be comfortable with JavaScript, HTML, CSS, and C # before developing a web application in ASP.NET.

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