private void GetBooksFromBasket()
{
//this method binds the book id to dataveiw after the final choice of book ahas been made so when the user removes an item this updates the gridview accordingly
if (Session["Cart"] != null)
{
using (booksDataContext data = new booksDataContext())
{
List <int> Cart = (List <int>)Session["Cart"];
var book = data.Books.Where(Book => Cart.Contains(Book.bookid));
GridView1.DataSource = book;
GridView1.DataBind();
}
}
}
protected void Button1_Click(object sender, EventArgs e)
{
try
{
using (booksDataContext Data = new booksDataContext())
{
//this is used to query the database from the linq datacontext class
string bookTitle = TextBoxBookTitle.Text;
var searchResults = Data.Books.Where(Books => (Books.bookTitle.Contains(bookTitle) || bookTitle.Length == 0));
GridView1.DataSource = searchResults;
GridView1.DataBind();
}
}
catch (Exception)
{
//to redirect the user to the error page if any erros occur in executing the search function
Response.Redirect("~/error.aspx");
}
}