private bool HasValidTitle(PreviewContentModel model, int? contentId)
{
var content = new Content();
content.GetContentByKey(FromString.UrlKey(model.PreviewTitle));
if (content.ContentID == 0 ||
(contentId != null && Convert.ToInt32(contentId) == content.ContentID))
return true;
// already exists
ModelState.AddModelError("PreviewTitle", "An article with this title already exists");
return false;
}
