//文章
endpoints.MapControllerRoute(
   name: "Article",
   pattern:  "p/{id}",
   defaults: new { controller = "Article", action = "Index" });
//分类
endpoints.MapControllerRoute(
   name: "Category",
   pattern: "category/{cid}-{pageindex?}",
   defaults: new { controller = "Category", action = "Index"});

文章是可以匹配到，但是分类就报错了，不能用-吗？我用/是没问题的，但是用-就不行。

报错信息
RoutePatternException: In the segment '{cid}-{pageindex?}', the optional parameter 'pageindex' is preceded by an invalid segment '-'. Only a period (.) can precede an optional parameter.