void MoveDown()
{
int itemIndex = AllBooks.IndexOf(SelectedBook);
AllBooks.Move(itemIndex + 1, itemIndex);
SelectedBook.BookID++;
AllBooks[itemIndex].BookID--;
}
void MoveUp()
{
int itemIndex = AllBooks.IndexOf(SelectedBook);
AllBooks.Move(itemIndex - 1, itemIndex);
SelectedBook.BookID--;
AllBooks[itemIndex].BookID++;
}
public bool MoveDownCanExecute()
{
if (SelectedBook == null)
{
return(false);
}
if (AllBooks.IndexOf(SelectedBook) == AllBooks.Count - 1)
{
return(false);
}
return(true);
}
public bool MoveUpCanExecute()
{
if (SelectedBook == null)
{
return(false);
}
if (AllBooks.IndexOf(SelectedBook) == 0)
{
return(false);
}
return(true);
}