Answer
Action filters run before/after actions.
- Logging
- Validation
- Authentication
- Response modification
Quick Answer
Action filters run code before/after action execution. Use for: logging, input validation, performance timing, caching headers. Implement IActionFilter (sync) or IAsyncActionFilter (async). OnActionExecuting runs before the action, OnActionExecuted runs after. Apply as [attribute] on controller or action, or register globally in MVC options. Different from middleware: filters have access to action context (controller, action name, parameters).
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
Want to bookmark, take notes, or join discussions?
Sign in to access all features and personalize your learning experience.
Source: SugharaIQ