public ActionResult Edit(NewsViewModel newsViewModel, HttpPostedFileBase ImageFile)
{
if (ModelState.IsValid)
{
var newNews = db.News.Find(newsViewModel.NewsID);
if (newNews == null)
{
return(HttpNotFound());
}
// save image to disk
// /NewsImages/imagename.png
if (ImageFile != null)
{
// create relative path
string relativePath = "/NewsImages/" + DateTime.Now.Ticks.ToString() + "_" + ImageFile.FileName;
// map the relative to physical path
string physicalPath = Server.MapPath(relativePath);
// check if the image folder exists
string imageFolder = Path.GetDirectoryName(physicalPath);
if (!Directory.Exists(imageFolder))
{
Directory.CreateDirectory(imageFolder);
}
// save the image to physical path
ImageFile.SaveAs(physicalPath);
newsViewModel.ImageUrl = relativePath;
}
newsViewModel.UpdateNews(newNews);
newNews.Categories.Clear();
//always check if the object null before usage
if (newsViewModel.CategoryID != null)
{
foreach (var cID in newsViewModel.CategoryID)
{
var category = db.Categories.Find(cID);
if (category != null)
{
newNews.Categories.Add(category);
}
}
}
db.Entry(newNews).State = EntityState.Modified;
db.SaveChanges();
return(RedirectToAction("Index"));
}
ViewBag.UserID = new SelectList(db.Users, "UserID", "UserName", newsViewModel.UserID);
return(View(newsViewModel));
}
public NewsPage()
{
InitializeComponent();
var vm = new NewsViewModel(Navigation, new NewsDataStore());
BindingContext = vm;
vm.IsBusy = true;
Task.Run(() =>
{
vm.UpdateNews();
vm.IsBusy = false;
});
}
