Sitefinity MVC Feather Widgets - prevent caching

Question

I'm using the feather package and building feather widgets for Sitefinity 9.1. I can't seem to override the Output Cache for the widgets using the OutputCache attribute: [OutputCache(NoStore = true, Duration = 0, VaryByParam = "*")]. I don't want to have to disable caching at the page level, just at the widget level. How do I disable caching at the widget level in Sitefinity?

Answer 1

Better do it on the client-side, especially given that the Sitefinity's team is doing exactly that in the Login Status feather widget which should not be output cached:

The View contains two divs that are initially hidden and shown via javascript on the client depending on the status of the user (which is retrieved via web service):

https://github.com/Sitefinity/feather-widgets/blob/master/Telerik.Sitefinity.Frontend.Identity/Mvc/Views/LoginStatus/LoginStatus.LoginName.cshtml

The js code:

https://github.com/Sitefinity/feather-widgets/blob/master/Telerik.Sitefinity.Frontend.Identity/Mvc/Scripts/LoginStatus/login-status.js

EDIT: What you can try is to subscribe to the PageManager.Executing event and see if the page that was changed was your parent/group page. If so, then you can get all its child pages (PageData) with the API and increase their BuildStamp property with 1. This will invalidate their cache. More info here: http://docs.sitefinity.com/tutorial-subscribe-to-events-using-dataprovider-or-manager-class