public async Task <IActionResult> Edit(BookCreateViewModel ViewModel)
{
if (!ModelState.IsValid)
{
try
{
DateTime?PublishDate;
if (ViewModel.IsPublish == true && ViewModel.RecentIsPublish == false)
{
PublishDate = DateTime.Now;
}
else if (ViewModel.RecentIsPublish == true && ViewModel.IsPublish == false)
{
PublishDate = null;
}
else
{
PublishDate = ViewModel.PublishDate;
}
BookStor book = new BookStor()
{
BookId = ViewModel.BookId,
Title = ViewModel.Title,
ISBN = ViewModel.ISBN,
NumOfPages = ViewModel.NumOfPages,
Price = ViewModel.Price,
Stock = ViewModel.Stock,
IsPublish = ViewModel.IsPublish,
LanguageID = ViewModel.LanguageID,
PublisherID = ViewModel.PublisherID,
PublishYear = ViewModel.PublishYear,
Summary = ViewModel.Summary,
Weight = ViewModel.Weight,
PublishDate = PublishDate,
Delete = false,
};
_context.Update(book);
var RecentAuthors = (from a in _context.Auther_Books
where (a.BookId == ViewModel.BookId)
select a.AutherId).ToArray();
var RecentTranslators = (from a in _context.Translator_Books
where (a.BookId == ViewModel.BookId)
select a.TranslaorId).ToArray();
var DeletedAuthors = RecentAuthors.Except(ViewModel.AuthorID);
var DeletedTranslators = RecentTranslators.Except(ViewModel.TranslatorID);
var AddedAuthors = ViewModel.AuthorID.Except(RecentAuthors);
var AddedTranslators = ViewModel.TranslatorID.Except(RecentTranslators);
if (DeletedAuthors.Count() != 0)
{
_context.RemoveRange(DeletedAuthors.Select(a => new Auther_book {
AutherId = a, BookId = ViewModel.BookId
}).ToList());
}
if (DeletedTranslators.Count() != 0)
{
_context.RemoveRange(DeletedTranslators.Select(a => new Translator_Book {
TranslaorId = a, BookId = ViewModel.BookId
}).ToList());
}
if (AddedAuthors.Count() != 0)
{
_context.AddRange(AddedAuthors.Select(a => new Auther_book {
AutherId = a, BookId = ViewModel.BookId
}).ToList());
}
if (AddedTranslators.Count() != 0)
{
_context.AddRange(AddedTranslators.Select(a => new Translator_Book {
TranslaorId = a, BookId = ViewModel.BookId
}).ToList());
}
await _context.SaveChangesAsync();
ViewBag.MsgSuccess = "ذخیره تغییرات با موفقیت انجام شد.";
return(View(ViewModel));
}
catch
{
ViewBag.MsgFailed = "در ذخیره تغییرات خطایی رخ داده است.";
}
}
ViewBag.AuthorID = new SelectList(_context.Authers.Select(r => new ListAuther {
AutherId = r.AutherId, NameFamily = r.Name + " " + r.LastName
}), "AutherId", "NameFamily");
ViewBag.LanguageID = new SelectList(_context.Languges, "LanguegeName", "LanguegeName");
ViewBag.PublisherID = new SelectList(_context.Publishers, "PublisherId", "PublisherName");
ViewBag.TranslatorID = new SelectList(_context.Translators.Select(r => new ListTranslator {
TranslatorId = r.TranslaorId, NameFamily = r.Name + " " + r.LastName
}), "TranslatorId", "NameFamily");
return(View(ViewModel));
}
