c# - 如何在ASP.NET MVC中为属性路由添加默认参数

我正在尝试更改此基于约定的路由：

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

归因于路线：

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

但是我看不到如何像第一种方式那样定义默认参数。

最佳答案

您可以结合使用多个[Route]属性和可为空的参数来实现您的目标。

[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;
}

当您向电影/不带年份的电影发送请求时，该年份将使用默认值。将请求发送到movie / released / 2000时，URL参数将覆盖默认值。