Developer forum

namespace ParagraphDeletedObserver
{
    [Dynamicweb.Extensibility.Subscribe(Dynamicweb.Notifications.Standard.Paragraph.Deleted)]
    public class ParagraphDeletedObserver : Dynamicweb.Extensibility.NotificationSubscriber
    {
        internal const string CustomModuleSystemName = "MyCustomModuleSystemName";

        public override void OnNotify(string notification, Dynamicweb.Extensibility.NotificationArgs args)
        {
            // Cast to proper argument type
            var myArgs = (Dynamicweb.Notifications.Standard.Paragraph.ParagraphNotificationArgs)args;

            // Check whether the Custom Module is attached to the deleted paragraph
            // myArgs.Target is the Paragraph object being deleted
            if (myArgs.Target.ModuleSystemName.Equals(CustomModuleSystemName, System.StringComparison.InvariantCultureIgnoreCase))
            {
                ChangeSearchSettings(myArgs.Target);
            }
        }

        internal static void ChangeSearchSettings(Dynamicweb.Content.Paragraph p)
        {
            // Implement code to change the boolean value in search
        }
    }

    [Dynamicweb.Extensibility.Subscribe(Dynamicweb.Notifications.Standard.Page.Deleted)]
    public class PageDeletedObserver : Dynamicweb.Extensibility.NotificationSubscriber
    {
        public override void OnNotify(string notification, Dynamicweb.Extensibility.NotificationArgs args)
        {
            // Cast to proper argument type
            var myArgs = (Dynamicweb.Notifications.Standard.Page.PageNotificationArgs)args;

            // Check whether a paragraph on this page has the Custom Module attached
            foreach (Dynamicweb.Content.Paragraph p in Dynamicweb.Content.Paragraph.GetParagraphsByPageID(myArgs.Target.ID))
            {
                if (p.ModuleSystemName.Equals(ParagraphDeletedObserver.CustomModuleSystemName, System.StringComparison.InvariantCultureIgnoreCase))
                {
                    ParagraphDeletedObserver.ChangeSearchSettings(p);
                }
            }
        }
    }
}