ASP.NET Core Route attributes available in entire controller class

Question

Is there a way to make attributes specified in the route available in the whole class? For instance, consider this Controller:

[Route(\"api/store/{storeId}/         


        

Answer 1

If the controller inherits from Controller class then you can override OnActionExecuting method, if the controller inherits from ControllerBase you need to implement IActionFilter interface to make it work

[Route("api/store/{storeId}/[controller]")]
public class BookController : ControllerBase, IActionFilter
{
    private int storeId;

    [HttpGet("{id:int:min(1)}")]
    public async Task<IActionResult> GetBookById(int id)
    {
        // use value of storeId here
    }

    public void OnActionExecuted(ActionExecutedContext context)
    {
        //empty
    }

    public void OnActionExecuting(ActionExecutingContext context)
    {
        string value = context.RouteData.Values["storeId"].ToString();
        int.TryParse(value, out storeId);
    }
}

Or there is a better solution for this using [FromRoute] attribute on a controller property (as desribed here)

[Route("api/store/{storeId}/[controller]")]
public class BookController : ControllerBase
{
    [FromRoute(Name = "storeId")] 
    public int StoreId { get; set; }

    [HttpGet("{id:int:min(1)}")]
    public async Task<IActionResult> GetBookById(int id)
    {
        // use value of storeId here
    }       
}