Hi,

I'm trying to Show a Warning Message when deleting a content page from backoffice

I tried this "it is working on Umbraco 7 but not on Umbraco 8.1.1"

  private void ContentService_Trashing(IContentService sender, MoveEventArgs<IContent> e)
    {
        ///inform the user if the post is favorate 
        try
        {
            foreach (var content in e.MoveInfoCollection
               //Check if the content item type has a specific alias
               .Where(c => c.Entity.ContentType.Alias.InvariantEquals(Helper.PostContentTypeAlias))
               //Check if it is a new item
               //.Where(c => c.HasIdentity == false)
               )
            {
                //check if the item has a property called 'richText'
                if (DB_Oprs.DB_Oprs.IfFavoratePost(content.Entity.Id))
                {
                    e.Messages.Add(new EventMessage("Warning", string.Format("Can not delete {0}", " This Post Is Favorate"), EventMessageType.Warning));
                }
            }
        }
        catch (Exception ex)
        {
            Current.Logger.Error(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType, ex.Message, ex);
        }
    }

I Appreciate Any Help.