public void OpenWindowBookMethod()
{
if (CheckBook())
{
if (AuthorsOfBook.Count != 0)
{
AuthorsOfBook.Clear();
}
using (Model1 context = new Model1())
{
ObservableCollection <Author> Authors = context.Books.Where(c => (c.BookName == BookName)).Select(c => c.Authors).FirstOrDefault();
foreach (Author a in Authors)
{
AuthorsOfBook.Add(new AuthorViewModel()
{
SecondName = a.SecondName, FirstName = a.FirstName, FatherName = a.FatherName
});
}
}
NameOfBook = BookName;
SelectedAuthor = null;
WindowBooks WindowNew = new WindowBooks();
WindowNew.ShowDialog();
}
else
{
MessageBox.Show("Книга не найдена");
}
}
public void AddAuthorToBookMethod()
{
AuthorsOfBook.Add(SelectedAuthor);
if (CheckAuthor() == false)
{
AddAuthorMethod();
}
Add(NameOfBook, SelectedAuthor);
}
public void DeleteAuthorFromBookMethod()
{
Boolean proverca = false;
foreach (AuthorViewModel b in AuthorsOfBook)
{
if ((b.SecondName == SelectedAuthor.SecondName) & (b.FatherName == SelectedAuthor.FatherName) & (b.FirstName == SelectedAuthor.FirstName))
{
proverca = true;
}
}
if (proverca == true)
{
Delete(NameOfBook, SelectedAuthor);
AuthorsOfBook.Remove(SelectedAuthor);
}
else
{
MessageBox.Show("Автор в списке отсутствует");
}
}