ASP.NET Core in Action, Second Edition

5 Mapping URLs to Razor Pages using routing

This chapter covers

• Mapping URLs to Razor Pages
• Using constraints and default values to match URLs
• Generating URLs from route parameters

In chapter 4 you learned about the MVC design pattern and how ASP.NET Core uses it to generate the UI for an application using Razor Pages. Razor Pages contain page handlers that act as mini controllers for a request. The page handler calls the application model to retrieve or save data. The handler then passes data from the application model to the Razor view, which generates an HTML response.

Although not part of the MVC design pattern per se, one crucial part of Razor Pages is selecting which Razor Page to invoke in response to a given request. This process ...