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c#.netasp.net-mvcattributerouting

how to add default parameters to attribute routes in asp.net mvc

I am trying to change this convention based route:

routes.MapRoute(
    "MovieByReleaseDate",
    "movies/released/{year}/{month}",
    new { controller = "Movies", action = "ByReleasedDate" },
);

to attribute route:

[Route("movies/released/{year}/{month}")]

but I can't see how I can define default parameters like in the first way.

Solution

  • You can use multiple [Route] attributes coupled with nullable parameters to achieve your goal.

    [HttpGet]
[Route("movies/released/")]
[Route("movies/released/{year}")]
[Route("movies/released/{year}/{month}")]
public string Test(int? year = 2018, int? month = 1)
{
    return "The year is " + year;
}

    When you send a request to movies/released without a year, the default value is used for the year. When you send a request to movies/released/2000, the URL parameter overrides the default value.