// helper that renders a menu item at the correct indentation level.
void RecursiveRender(HtmlTextWriter output, MenuCompositeItem item, int depth)
{
if (depth > 0) // skip root node
{
if (depth == 1)
{
output.Write("<li>"); // main menu
}
else
{
output.Write(@"<li class=""indented"">"); // sub menu
}
output.Write(@"<a href=""" + item.Link + @""">");
if (item.Item == SelectedItem) // selected item
{
output.Write(@"<span class=""selected"">" + item.Item + "</span>");
}
else
{
output.Write(item.Item); // unselected item.
}
output.Write("</a>");
}
// recursively iterate over its children
for (int i = 0; i < item.Children.Count; i++)
{
RecursiveRender(output, item.Children[i], depth + 1);
}
}
// helper that renders a menu item at the correct indentation level.
void RecursiveRender(HtmlTextWriter output, MenuCompositeItem item, int depth)
{
if (depth > 0) // skip root node
{
if (depth == 1)
output.Write("<li>"); // main menu
else
output.Write(@"<li class=""indented"">"); // sub menu
output.Write(@"<a href=""" + item.Link + @""">");
if (item.Item == SelectedItem) // selected item
output.Write(@"<span class=""selected"">" + item.Item + "</span>");
else
output.Write(item.Item); // unselected item.
output.Write("</a>");
}
// recursively iterate over its children
for (int i = 0; i < item.Children.Count; i++)
{
RecursiveRender(output, item.Children[i], depth + 1);
}
}
// establishes the composite menu hierarchy which is present on all pages.
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
// build the composite menu tree
// this tree implements the Composite Design Pattern
var root = new MenuCompositeItem("root", null);
var home = new MenuCompositeItem("home", UrlMaker.ToDefault());
var shop = new MenuCompositeItem("shopping", UrlMaker.ToShopping());
var prod = new MenuCompositeItem("products", UrlMaker.ToProducts());
var srch = new MenuCompositeItem("search", UrlMaker.ToSearch());
var admn = new MenuCompositeItem("administration", UrlMaker.ToAdmin());
var cust = new MenuCompositeItem("members", UrlMaker.ToMembers());
var ordr = new MenuCompositeItem("orders", UrlMaker.ToOrders());
MenuCompositeItem auth;
if (Request.IsAuthenticated)
auth = new MenuCompositeItem("logout", UrlMaker.ToLogout());
else
auth = new MenuCompositeItem("login", UrlMaker.ToLogin());
shop.Children.Add(prod);
shop.Children.Add(srch);
admn.Children.Add(cust);
admn.Children.Add(ordr);
root.Children.Add(home);
root.Children.Add(shop);
root.Children.Add(admn);
root.Children.Add(auth);
TheMenuComposite.MenuItems = root;
}
}