protected void btn_Done_Click(object sender, EventArgs e)
{
string User_ID = Request.Cookies["CurrentLoggedInUser"].Value;
bookstorebo.uploadToHistory(User_ID, lbl_ReceiptNum.Text, lbl_ItemList.Text, Convert.ToDecimal(lbl_Cost.Text), lbl_PurchaseDate.Text);
bookstorebo.deleteAllFromCart();
Response.Redirect("Shopping Cart.aspx");
}