What are custom attributes in ASP.NET MVC?

What are custom attributes in ASP.NET MVC?

Custom attributes in ASP.NET MVC are user-defined metadata that can be applied to classes, methods, or properties to add additional information or behavior.

Can you give me an example of how to create a custom attribute?

Sure! You can create a custom attribute by defining a class that inherits from the Attribute class. For example:

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method)]
public class MyCustomAttribute : Attribute
{
    public string Description { get; set; }
}

How do I use this custom attribute in a controller?

You can apply the custom attribute to a controller or action method like this:

[MyCustomAttribute(Description = "This is my custom attribute")]
public class HomeController : Controller
{
    public ActionResult Index()
    {
        return View();
    }
}

What are some common use cases for custom attributes?

Common use cases include validation, authorization, and providing metadata for documentation or UI generation.