public string DeleteBook(string bookid)
{
if (!String.IsNullOrEmpty(bookid))
{
try
{
using (BookDBContext objContext = new BookDBContext())
{
int bookId = Int32.Parse(bookid);
var book = objContext.book.Find(bookid);
objContext.book.Remove(book);
objContext.SaveChanges();
return "Book record deleted successfully";
}
}
catch (Exception ex)
{
return "Book details not found";
}
}
else
{
return "Invalid operation";
}
}
public string AddBook(Book book)
{
if (book != null)
{
using (BookDBContext objContext = new BookDBContext())
{
objContext.book.Add(book);
objContext.SaveChanges();
return "Book record added Successfully";
}
}
else
{
return "Invalid book record";
}
}
public string UpdateBook(Book book)
{
if (book != null)
{
using (BookDBContext objContext = new BookDBContext())
{
var bookId = Convert.ToInt32(book.Id);
Book _book = objContext.book.Where(b => b.Id == bookId).FirstOrDefault();
_book.Title = book.Title;
_book.Publisher = book.Publisher;
_book.Isbn = book.Isbn;
_book.Author = book.Author;
objContext.SaveChanges();
return "Book record updated successfully";
}
}
else
{
return "invalid book record";
}
}