Save data instead of adding to database - asp.net

Question

I'm trying to edit an article in my asp.net mvc project. This is what I do when I create a project:
public ActionResult Create(ArticleViewModel model)
{
if (ModelState.IsValid)
{
try
{
// Get the userID who created the article
User usr = userrepo.FindByUsername(User.Identity.Name);
model.UsernameID = usr.user_id;
repository.AddArticle(model.Title, model.Description, model.ArticleBody);
}
catch (ArgumentException ae)
{
ModelState.AddModelError("", ae.Message);
}
return RedirectToAction("Index");
}
return View(model);
}
In my repository:
public void AddArticle(string Title, string Description, string ArticleBody)
{
item Item = new item()
{
item_title = Title,
item_description = Description,
article_body = ArticleBody,
item_createddate = DateTime.Now,
item_approved = false,
user_id = 1,
district_id = 2,
link = "",
type = GetType("Article")
};
try
{
AddItem(Item);
}
catch (ArgumentException ae)
{
throw ae;
}
catch (Exception)
{
throw new ArgumentException("The authentication provider returned an error. Please verify your entry and try again. " +
"If the problem persists, please contact your system administrator.");
}
Save();
// Immediately persist the User data
}
public void AddItem(item item)
{
entities.items.Add(item);
}
But now I want to edit an article, this is what I have till now:
public ActionResult Edit(int id)
{
var model = repository.GetArticleDetails(id);
return View(model.ToList());
}
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Edit(ArticleViewModel model)
{
if (ModelState.IsValid)
{
// Attempt to register the User
try
{
item Item = repository.GetArticleDetailsByTitle(model.Title);
Item.item_title = model.Title;
Item.item_description = model.Description;
Item.article_body = model.ArticleBody.
// HERE I NEED TO SAVE THE NEW DATA
return RedirectToAction("Index", "Home");
}
catch (ArgumentException ae)
{
ModelState.AddModelError("", ae.Message);
}
}
// If we got this far, something failed, redisplay form
return View(model);
}
As you can see I check the adjusted text and drop it in "Item". But how can I save this in my database? (the function in my repository)

Answer 1

I think your save() method had entityobject.SaveChanches()
So you want to call that save() method in here
try
{
item Item = repository.GetArticleDetailsByTitle(model.Title);
Item.item_title = model.Title;
Item.item_description = model.Description;
Item.article_body = model.ArticleBody.
**Save();**
return RedirectToAction("Index", "Home");
}
should be need to only Save() method, could not need to AddItem() method .

Answer 2

I'm afraid you'll need to get article again from database, update it and save changes. Entity framework automatically tracks changes to entites so in your repository should be:
public void EditArticle(Item article)
{
var dbArticle = entities.items.FirstOrDefault(x => x.Id == article.Id);
dbArticle.item_title = article.item_title;
//and so on
//this is what you call at the end
entities.SaveChanges();
}