Pro ASP.NET Core 7, Tenth Edition

30 Using filters

This chapter covers

• Injecting logic into request pipelines
• Understanding the different filter types and when each is executed
• Creating and applying filters
• Managing the filter lifecycle and execution order

Filters inject extra logic into request processing. Filters are like middleware that is applied to a single endpoint, which can be an action or a page handler method, and they provide an elegant way to manage a specific set of requests. In this chapter, I explain how filters work, describe the different types of filters that ASP.NET Core supports, and demonstrate the use of custom filters and the filters provided by ASP.NET Core. Table 30.1 provides a guide to the chapter.

Table 30.1 Chapter guide

Problem	Solution ...