How to display search results on a separate page

On my search.aspx I'm using a ListView to display search results:
Markup:
<asp:TextBox runat="server" ID="txtSearch" placeholder="search" /> <asp:Button runat="server" ID="btnSubmit" Text="Search" OnClick="btnSubmit_Click" /> <asp:ListView ID="ListView1" runat="server"> <ItemTemplate> <asp:HyperLink ID="HyperLink1" runat="server" ImageUrl='<%# String.Format("../Images/books/{0}.jpg", Eval("Id").ToString()) %>' NavigateUrl='<%# "../books/bookdetails.aspx?BookId=" + Eval("Id").ToString() %>'></asp:HyperLink> <asp:Label ID="TitleLabel" runat="server" Text='<%# Eval("Title") %>' /> <asp:Label ID="Label1" runa ...