how to select menu item/sub item through c# code

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C#

I am developing c# web application .net frame work 4.5.

I have created a menue control through following code.

<asp:Menu ID="DropDownMenu" runat="server" OnMenuItemClick="DropDownMenu_MenuItemClick" Orientation="Horizontal">
            <DynamicHoverStyle BackColor="Green" />
            <Items>
                <asp:MenuItem Text="Home" Value="Item1">
                    <asp:MenuItem Text="Sub Item1" Value="Sub Item1"></asp:MenuItem>
                    <asp:MenuItem Text="Sub Item2" Value="Sub Item2"></asp:MenuItem>
                    <asp:MenuItem Text="Sub Item3" Value="Sub Item3"></asp:MenuItem>
                </asp:MenuItem>
                <asp:MenuItem Text="Functions" Value="Item5">
                    <asp:MenuItem Text="Reverse Complement" Value="Sub Item1"></asp:MenuItem>
                    <asp:MenuItem Text="Translation" Value="Sub Item2"></asp:MenuItem>
                    <asp:MenuItem Text="Reverse Translation" Value="Sub Item3"></asp:MenuItem>
                    <asp:MenuItem Text="Orf finder" Value="Sub Item4"></asp:MenuItem>
                    <asp:MenuItem Text="In Silico PCR" Value="Sub Item5"></asp:MenuItem>
                </asp:MenuItem>

The problem is that i dont know how to select a specific menu item or sub item.
e.g if i select menu sub item"translation", it should go on a new page.

would any one guide me please that how to select menue items and sub items through c# code ????

thanks