// GET: Articles/Create
public ActionResult Create()
{
ViewModels.ArticleViewModel vm = new ViewModels.ArticleViewModel();
vm.AllTopics = db.Topics.Select(c => new SelectListItem {
Text = c.Name, Value = c.ID.ToString()
}).ToList();
vm.AllAuthors = db.Authors.Select(c => new SelectListItem {
Text = c.FirstName + " " + c.MiddleName + " " + c.LastName, Value = c.ID.ToString()
}).ToList();
return(View(vm));
}
public ActionResult Edit([Bind(Include = "ID,Name,SelectedTopicIds,SelectedAuthorId,DateCreated,DateUpdated")] ViewModels.ArticleViewModel articleVM)
{
if (ModelState.IsValid)
{
Article existingArticle = db.Articles.Find(articleVM.ID);
existingArticle.ID = articleVM.ID;
existingArticle.Name = articleVM.Name;
//existingArticle.DateCreated = articleVM.DateCreated;
existingArticle.DateUpdated = DateTime.Today;
//existingArticle.Topics = db.Topics.Where(c => articleVM.SelectedTopicIds.Contains(c.ID)).ToList();
existingArticle.Author = db.Authors.Where(c => articleVM.SelectedAuthorId.Equals(c.ID)).SingleOrDefault();
var existingTopicIds = existingArticle.Topics.Select(c => c.ID);
var deletedTopicIds = existingTopicIds.Except(articleVM.SelectedTopicIds).ToList();
var addedTopicIds = articleVM.SelectedTopicIds.Except(existingTopicIds);
foreach (var item in deletedTopicIds)
{
var deletedItem = db.Topics.Where(c => c.ID == item).SingleOrDefault();
existingArticle.Topics.Remove(deletedItem);
}
foreach (var item in addedTopicIds)
{
var addedItem = db.Topics.Where(c => c.ID == item).SingleOrDefault();
existingArticle.Topics.Add(addedItem);
}
db.Entry(existingArticle).State = EntityState.Modified;
db.SaveChanges();
return(RedirectToAction("Index"));
}
return(View(articleVM));
}
