在自定义IRouteConstraint中传递参数

public class CustomRouteConstraint : IRouteConstraint
{
    private readonly string _param;

    public CustomRouteConstraint(string param)
    {
        _param = param;
    }

    public bool Match(
        HttpContext? httpContext,
        IRouter? route,
        string routeKey,
        RouteValueDictionary values,
        RouteDirection routeDirection)
    {
        // 使用 _param 进行匹配逻辑
        return values[routeKey]?.ToString() == _param;
    }
}

routes.Add(new Route(
    new RouteOptions(),
    new DefaultInlineConstraintResolver()
    {
        ConstraintMap = new RouteValueDictionary
        {
            { "custom", typeof(CustomRouteConstraint) }
        }
    },
    "https://localhost:5001",
    new Route(
        "api/{controller}/{action=Index}/{id?}",
        new RouteOptions
        {
            Constraints = new RouteValueDictionary
            {
                { "controller", "custom:myParam" }
            }
        },
        new DefaultInlineConstraintResolver()
    )
));