How can I use attributes for logging in ASP.NET Core?

How can I use attributes for logging in ASP.NET Core?

You can use custom attributes to log specific actions or data in your ASP.NET Core application. For example, you can create an attribute that logs method execution time.

Can you show me an example of a custom logging attribute?

Sure! Here's a simple example:

public class LogExecutionTimeAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext context)
    {
        // Start timing
    }
    public override void OnActionExecuted(ActionExecutedContext context)
    {
        // Log the execution time
    }
}

How do I apply this attribute to a controller action?

You can apply it by adding the attribute above your action method like this:

[LogExecutionTime]
public IActionResult MyAction()
{
    // Action logic
}

What if I want to log additional information?

You can modify the attribute to accept parameters, allowing you to log different types of information based on the context.