protected void btnSearch_ClickLINQ(object sender, EventArgs e)
        {
            BooklistDataContext context = new BooklistDataContext(SPContext.Current.Web.Url);

            List <BookView> bookList = (from B in context.Books
                                        where B.Author == ddlAuthor.SelectedValue
                                        select new BookView {
                Title = B.Title, Author = B.Author
            }).ToList();

            gvResults.DataSource = bookList;
            gvResults.DataBind();
        }
        protected void PopulateAuthorListLINQ()
        {
            BooklistDataContext context = new BooklistDataContext(SPContext.Current.Web.Url);



            var authorList = (from B in context.Books
                              select B.Author);

            foreach (string author in authorList)
            {
                ddlAuthor.Items.Add(author);
            }

            //ddlAuthor.DataSource = authorList;
            //ddlAuthor.DataBind();
        }