public IActionResult AddDocPage(string returnUrl, int GroupID)
        {
            var model = new AddDocPageViewModel {
                returnUrl = returnUrl, GroupID = GroupID, GroupName = Repository.Groups.FirstOrDefault(x => x.GroupID == GroupID)?.GroupName ?? "Public"
            };

            return(View(model));
        }
 public IActionResult AddDocPage(AddDocPageViewModel model)
 {
     if (ModelState.IsValid)
     {
         Documentation.AddPage(new DocPage {
             GroupID = model.GroupID, Name = model.Name, Date = model.Date
         });
         return(LocalRedirect(model.returnUrl));
     }
     return(View(model));
 }