An Introduction To ASP NET Razor Pages

In Razor Pages, a foreach loop is prepended by the @ symbol followed by a set of conditions wrapped in parentheses. Within the conditions, we can create a variable that will be used when rendering its value on the browser. In Razor Pages, a for loop is prepended by the @ symbol followed by a set of conditions wrapped in parentheses. Alex Wolf works as a .NET and Azure Content Developer at Microsoft, and is passionate about learning and teaching software development.

He has over a decade of experience and multiple certifications in the .NET ecosystem and related technologies. He is also highly engaged in DevOps and Cloud technologies to improve development workflows and infrastructure. Alex has worked for companies of nearly every size, ranging from small start-ups to very large enterprises. Moreinterest in other visual and interactive technologies such as digital animation and game development with Maya and Unity. Razor Pages is the default for building server-side web applications in ASP.NET Core. Components within the underlying MVC framework still have their uses such as using controllers for building RESTful APIs.

Razor Page Application Structure

In this tutorial we will learn how to create a simple Core Web Application step by step
to understand over all structure of core project folders, pages, , code behind etc. Razor syntax is based on the ASP.NET framework, the part of the Microsoft.NET Framework that’s specifically designed for creating web
applications. The _ViewImports.cshtml file is automatically generated under /Pages when we create a template with ASP.NET. A while loop repeats the execution of a sequence of statements as long as a set of conditions is true, once the condition becomes false we break out of the loop. Conditionals in Razor code can be written pretty much the same way you would in regular C# code.

  • A distinct change in the architectural design was the unification of the ASP.NET web API and ASP.NET MVC into ASP.NET Core.
  • Razor Syntax allows you to embed code (C#) into page views through the use of a few keywords (such as “@”), and then have the C# code be processed and converted at runtime to HTML.
  • It may be due to database configuration, but there could also be other factors, including complex operations on a large database or database server resource exhaustion.
  • The second line links the Razor page to a PageModel, IndexModel.
  • If you want a dynamic web site, that is one where the content is regularly being added to, you have a number of options available to you.
  • If not, then if the next condition is true, this condition will be executed.

Razor Pages is included within .NET Core from version 2.0 onwards, which is available as a free download as either an SDK (Software Development Kit) or a Runtime. The SDK includes the runtime and command line tools for creating .NET Core applications. The SDK is installed for you when you install Visual Studio 2017 Update 3 or later. The Runtime-only installation is intended for use on machines where no development takes place. It has simplified syntax which is easy to learn and code. You could very likely face performance issues if your webpage returns huge chunks of data at a time.


When @ symbol is used with razor syntax, it transits into Razor specific markup, otherwise it transitions into plain C#. We used it, to start single line expression, single statement block or multi-statement block. In Razor Pages, you can reduce code duplication by sharing layouts between view pages. A default layout is set up for your application in the _Layout.cshtml file located in Pages/Shared/.

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In order for the page to be treated as a Razor Page, and have ASP.NET parse the view syntax with the Razor engine, the directive @page should be added at the top of the file. Running our application, we can see our functionality in action. We can view our HTML, POST the form with our name, and display the Name property, which we stored in TempData. ASP.NET helpers are components that can be accessed by single lines of
Razor code. When we run the project, it will look for the named Razor page in the Pages folder. Right click on the Pages folder and add a new Razor page.

ASP.NET: Razor Syntax

An important feature of dynamic web pages is that you can determine what to
do based on conditions. ASP.NET web pages with Razor syntax have the special file extension cshtml asp net razor tutorial
(Razor using C#) or vbhtml (Razor using VB). Just like the _ViewStart.cshtml file, _ViewImports.cshtml is invoked for all your view pages before they are rendered.