public int BorrowBook(int idPerson, int idBook, int idLib)
{
try
{
Object[] param = { idBook };
if (data.Borrows.Find(param).IDReader == idPerson)
{
data.Borrows.Remove(data.Borrows.Find(param));
data.SaveChanges();
return(1);
}
}catch (Exception ee)
{
if (checkBook(idBook))
{
Borrow br = new Borrow();
br.IDBook = idBook;
br.IDLibrarian = idLib;
br.IDReader = idPerson;
br.Date = DateTime.Now;
br.ExpertDate = DateTime.Now.AddMonths(5);
data.Borrows.Add(br);
data.SaveChanges();
return(0);
}
throw ee;
}
return(-1);
}
public void delete(Header l)
{
Header li = data.Headers.Find(l.ID);
data.Headers.Remove(li);
data.SaveChanges();
}
public void AddReader(Reader re)
{
data.Readers.Add(re);
data.SaveChanges();
}