我将在Controller中(最终在构造函数中)进行操作:

I would do in the Controller (eventually in the constructor):

 typeof(RoleViewModel).Assembly.MapTypes();

如果安装Automapper的版本4，则可以解决此问题，因为在最后一个版本中，属性不起作用.因此，请在Package-Manager控制台中添加以下说明:

The problem can be solved if you install version 4 of Automapper because in the last version Attributes are not working. So please add the following instructions in Package-Manager Console:

uninstall-package Automapper

install-package Automapper -version 4.2.1