Hi Bendik

I'm afraid that I don't know how to do this using the C# API's but I'm wondering wether what you're doing could be achieved easier using the backoffice UI api and then making use of the notifications service here https://our.umbraco.org/apidocs/ui/#/api/umbraco.services.notificationsService - Then you could perhaps just set the "sticky" option to true if you're using the "add" method?

Hope this helps.

/Jan

Hi Jan and thank you for your advice!

I am using the notificationService in my plugin controller, but here I am stuck down in this server-side event handler. And I don't know any way to pass information from here up to the controller. But maybe you can help? Here's my code:

public class SaveContentEventHandler : ApplicationEventHandler
{
    protected override void ApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
    {
        ContentService.Saving += ContentServiceSaving;
    }

    private void ContentServiceSaving(IContentService sender, SaveEventArgs<IContent> e)
    {
        e.Messages.Add(new EventMessage("My message title", "My message", EventMessageType.Error));
    }
}
}

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