DevReach site: Create MySessions custom widget
You create a custom widget that gives the user the ability to attend a session from a list of available sessions.
By clicking Will Attend, you claim that you will attend the current session and the Attended by counter will increase by 1. If you click the Attending button, you state that you no longer want to attend that session and the counter drops with 1.
The following screenshot displays the final looks of the MySessions widget:
MySessions is a custom widget that you must register by its virtual path in the toolbox.
For more information about registering a widget, see Register a new widget in Sitefinity CMS toolbox.
For more information about custom widgets, see Overview: Types of widgets.