public async Task Init()
{
if (!TocItems.Any())
{
ITocItem root = await Book.QueryToc(null, null);
ListChildren(root);
}
}
public bool Back()
{
if (TocItems.Any() && TocItems.First().Level > 1)
{
ListChildren(TocItems.First().Parent.Parent);
return(true);
}
return(false);
}