// GET: Comics/Edit/5
//edit comic by comic id
public async Task <IActionResult> Edit(int?id)
{
//if no comic id return notfound
if (id == null)
{
return(NotFound());
}
//get the comic id
var comic = await _context.Comics
.FindAsync(id);
if (comic == null)
{
return(NotFound());
}
//use the editcomicimageviewmodel to be able to add a new image to comic
var viewModel = new EditComicImageViewModel()
{
comic = comic
};
//return the view of the viewmodel
return(View(viewModel));
}
public async Task <IActionResult> Edit(int id, EditComicImageViewModel viewModel)
{
//use the editcomicimageviewmodel to edit a comic with an image get the comic id
var comicWithImage = await _context.Comics.AsNoTracking().FirstOrDefaultAsync(c => c.Id == id);
//if comic id cant be found return not found
if (id != viewModel.comic.Id)
{
return(NotFound());
}
//remove the userid because the editcomicimageviewmodel does not have userid
ModelState.Remove("comic.UserId");
if (ModelState.IsValid)
{
try
{
//get the current user
var currentUser = await GetCurrentUserAsync();
//check to see if the comic in inventory has an image attached view the image in the edit page
if (viewModel.ImageFile == null && comicWithImage.ComicImage != null)
{
viewModel.comic.ComicImage = comicWithImage.ComicImage;
}
//if no image add one to the comic inventory
else
{
using (var memoryStream = new MemoryStream())
{
await viewModel.ImageFile.CopyToAsync(memoryStream);
viewModel.comic.ComicImage = memoryStream.ToArray();
}
}
;
//add the user id, update the new image and data, and save the changes
viewModel.comic.UserId = currentUser.Id;
_context.Update(viewModel.comic);
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
//if no comic exists with a matching id in the inventory return not found
if (!ComicExists(viewModel.comic.Id))
{
return(NotFound());
}
else
{
throw;
}
}
//if comic edit page is updated properly and submited return user back to comic inventory index
return(RedirectToAction(nameof(Index)));
}
else
{
}
//if comic is not updated properly return view of the edit comic by id page
return(View(viewModel));
}
