How to log information in MVC asp.net 3.0 on the controller level rather then wrting the samething on each action.

Question

Hello All,

I am using MVC asp.net core 3.1 application. I am implementing the log. I do have some informational logs that log some messages but then I want to log information everything each action is called with the information with controller and action.
I have tried many solution out there but I am getting issues. I tried filters on controller level but my code breaks. If anyone can point me to the solution.

Thanks

Answer 1

Hi @Amir Saleem ,

If you want to log the infomation before action is called,you could custom ActionFilter to meet your requirement.

Here is a working demo:

1.Custom ActionFilter:

public class CustomFilter: IActionFilter  
{  
    private readonly ILogger<CustomFilter> _logger;  
    public CustomFilter(ILogger<CustomFilter> logger)  
    {  
        _logger = logger;  
    }  
    public void OnActionExecuting(ActionExecutingContext context)  
    {  
        var controllerName = ((Microsoft.AspNetCore.Mvc.ControllerBase)context.Controller)  
                                .ControllerContext  
                                .ActionDescriptor  
                                .ControllerName;  
        var actionName = ((Microsoft.AspNetCore.Mvc.ControllerBase)context.Controller)  
                                .ControllerContext  
                                .ActionDescriptor  
                                .ActionName;  
        _logger.LogInformation("Get into "+actionName+" action in "+ controllerName + " controller");  
    }  
    public void OnActionExecuted(ActionExecutedContext context)  
    {  
    }  
}  

2.Register the filter:

services.AddControllers(  
    config =>  
    {  
        config.Filters.Add<CustomFilter>();  
    });  

3.Result:

---

If the answer is helpful, please click "Accept Answer" and upvote it.

Note: Please follow the steps in our  documentation  to enable e-mail notifications if you want to receive the related email notification for this thread.

Best Regards,
Rena