/// <summary>
/// Recursive function that renders a menu item at the correct
/// indentation level. This is a private helper function.
/// </summary>
/// <param name="output">The HTML output stream.</param>
/// <param name="item">Menu item.</param>
/// <param name="depth">Indentation depth.</param>
private 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);
}
}
/// <summary>
/// Establishes the composite menu hierarchy which is present on all pages.
/// </summary>
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
// Build the composite menu tree
// This tree implements the Composite Design Pattern.
MenuCompositeItem root = new MenuCompositeItem("root", null);
MenuCompositeItem home = new MenuCompositeItem("home", ResolveUrl("~/Default.aspx"));
MenuCompositeItem shop = new MenuCompositeItem("shopping", ResolveUrl("~/WebShop/Shopping.aspx"));
MenuCompositeItem prod = new MenuCompositeItem("products", ResolveUrl("~/WebShop/Products.aspx"));
MenuCompositeItem srch = new MenuCompositeItem("search", ResolveUrl("~/WebShop/Search.aspx"));
MenuCompositeItem cart = new MenuCompositeItem("cart", ResolveUrl("~/WebShop/Cart.aspx"));
MenuCompositeItem admn = new MenuCompositeItem("administration", ResolveUrl("~/WebAdmin/Admin.aspx"));
MenuCompositeItem cust = new MenuCompositeItem("customers", ResolveUrl("~/WebAdmin/Customers.aspx"));
MenuCompositeItem ordr = new MenuCompositeItem("orders", ResolveUrl("~/WebAdmin/Orders.aspx"));
MenuCompositeItem auth;
if (Request.IsAuthenticated)
auth = new MenuCompositeItem("logout", ResolveUrl("~/Logout.aspx"));
else
auth = new MenuCompositeItem("login", ResolveUrl("~/Login.aspx"));
shop.Children.Add(prod);
shop.Children.Add(srch);
shop.Children.Add(cart);
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;
}
}
/// <summary>
/// Renders the entire menu structure.
/// </summary>
/// <param name="output">The HTML output stream</param>
protected override void RenderContents(HtmlTextWriter output)
{
MenuCompositeItem root = this.MenuItems;
output.Write(@"<div id=""navcontainer"">");
output.Write(@" <ul id=""navlist"">");
RecursiveRender(output, root, 0);
output.Write(@" </ul>");
output.Write(@"</div>");
}
/// <summary>
/// Recursive function that renders a menu item at the correct
/// indentation level. This is a private helper function.
/// </summary>
/// <param name="output">The HTML output stream.</param>
/// <param name="item">Menu item.</param>
/// <param name="depth">Indentation depth.</param>
private 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);
}
}
