asp.net menu to show only parent, siblings and children as static menus

[Clint]

Anyone have any idea how to have an asp.net menu show only the parent,
siblings and immediate children of the current node?

It seems like the ultimate way to navigate a large sitemap. I've set
the StartFromCurrentNode="true" and StartingNodeOffset="-1" on the
SitemapDataSource and set the number of static menu levels to 3 on the
menu. However, this ends up displaying the children of all the
siblings as well (which makes the menu much too large).

Ideas?

Thanks,
Clint

 

[Kelly Leahy]

Clint,

I'm sure this isn't the best solution, but it's what I had time to come up
with. It could definitely use a better test in the IsSamePage method, but I
couldn't come up with one at the moment.... Hopefully this will get you on
the right track.

protected void Page_Load(object sender, EventArgs e)
{
// Find the menu item (if any) that corresponds to this page...
MenuItem theItem = FindMenuItem(Menu1.Items);

// Now, figure out which parent item it belongs to.
MenuItem theParent = GetItemParent(theItem);

// Finally, remove all children from the other top-level menu items.
RemoveChildrenOfOthers(Menu1.Items, theParent);
}

private bool IsSamePage(string TargetUrl)
{
return Server.MapPath(Request.Url.LocalPath) ==
Server.MapPath(TargetUrl);
}

private MenuItem FindMenuItem(MenuItemCollection mis)
{
foreach (MenuItem mi in mis)
{
if (IsSamePage(mi.NavigateUrl))
return mi;
else
{
MenuItem mi2 = FindMenuItem(mi.ChildItems);
if (mi2 != null) return mi2;
}
}
return null;
}

private MenuItem GetItemParent(MenuItem mi)
{
if (mi.Parent == null)
return mi;
else
return GetItemParent(mi.Parent);
}

private void RemoveChildrenOfOthers(MenuItemCollection all, MenuItem keep)
{
foreach (MenuItem mi in all)
{
if (mi != keep)
mi.ChildItems.Clear();
}
}

Cheers,
Kelly

 

[Clint]

That's awesome Kelly. Thank you!

I just need to figure out how to encapsulate that with a master page.

Any ideas where to start? The best I can come up with is to put this
in a subclass of Page that all my pages inherit from.

Thanks again,
Clint