Book Image

ASP.NET Core MVC 2.0 Cookbook

By : Jason De Oliveira, Engin Polat, Stephane Belkheraz
Book Image

ASP.NET Core MVC 2.0 Cookbook

By: Jason De Oliveira, Engin Polat, Stephane Belkheraz

Overview of this book

The ASP.NET Core 2.0 Framework has been designed to meet all the needs of today’s web developers. It provides better control, support for test-driven development, and cleaner code. Moreover, it’s lightweight and allows you to run apps on Windows, OSX and Linux, making it the most popular web framework with modern day developers. This book takes a unique approach to web development, using real-world examples to guide you through problems with ASP.NET Core 2.0 web applications. It covers Visual Studio 2017- and ASP.NET Core 2.0-specifc changes and provides general MVC development recipes. It explores setting up .NET Core, Visual Studio 2017, Node.js modules, and NuGet. Next, it shows you how to work with Inversion of Control data pattern and caching. We explore everyday ASP.NET Core MVC 2.0 patterns and go beyond it into troubleshooting. Finally, we lead you through migrating, hosting, and deploying your code. By the end of the book, you’ll not only have explored every aspect of ASP.NET Core MVC 2.0, you’ll also have a reference you can keep coming back to whenever you need to get the job done.
Table of Contents (26 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
Index

Creating and using a resource filter


In this recipe, you will learn how to create a resource filter and when to use it.

Getting ready

Let's create an empty web application with VS 2017.

How to do it...

After authorization filters, resource filters are the first filters executed on the filter pipeline. This filter is executed after the ActionFilter if no exception occurs. It's also the last filter eventually executed, leaving the filter pipeline.

A common resource filter implementation is cache managing. The OutputCache attribute in MVC is an example of a resource filter.

To create our own resource filter, we have to create a class that derives from IResourceFilter or IAsyncResourceFilter, depending on whether we want to create a synchronous or asynchronous filter.

  1. First, let's create an empty synchronous resource filter:
public class MyResourceFilter : IResourceFilter
{
  public void OnResourceExecuted(ResourceExecutedContext context)
  {
    // code executed before the filter executes
  }
  public...