public bool UpdateBook(int ID, string title, string author, string publisher, int year)
{
using (LinqLibraryDataContext dataContext = new LinqLibraryDataContext())
{
if (dataContext.GetBook(ID) != null)
{
dataContext.UpdateTitle(ID, title);
dataContext.UpdateAuthor(ID, author);
dataContext.UpdatePublisher(ID, publisher);
dataContext.UpdateYear(ID, year);
return(true);
}
return(false);
}
}
public bool UpdateTitle(int id, string tit)
{
using (LinqLibraryDataContext dataContext = new LinqLibraryDataContext())
{
if (dataContext.GetBook(id) == null)
{
return(false);
}
else
{
dataContext.UpdateTitle(id, tit);
return(true);
}
}
}
public void TestUpdatingBooks()
{
using (LinqLibraryDataContext rep = new LinqLibraryDataContext(m_ConnectionString))
{
rep.AddBook("just a book", "with some author", "publisher", 2002);
Book hello = rep.GetBook("just a book");
rep.UpdateAuthor(hello.book_ID, "not a book");
rep.UpdatePublisher(hello.book_ID, "not a publisher");
rep.UpdateTitle(hello.book_ID, "not an author");
Book bye = rep.GetBook(hello.book_ID);
Assert.AreEqual("not a book", bye.author);
Assert.AreEqual("not a publisher", bye.publisher);
Assert.AreEqual("not an author", bye.title);
}
}
