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  • Chriztian Steinmeier 2800 posts 8790 karma points MVP 8x admin c-trib
    May 28, 2019 @ 17:05
    Chriztian Steinmeier
    0

    MegaNav: Getting context while rendering navigation

    Hi all,

    I consider myself an expert in rendering navigations using XSLT, and using Razor I've come quite far as well - as long as they're based on the Content structure it's no problem.

    Now I have a site which is using Cogworks' MegaNav package for the navigation, and here's where I get stuck:

    I need to add a class on a top level item if the currently rendered page is somewhere below it. Easy when using the content structure, but when using MegaNav, I don't have access to any Ancestor/Descendant helper methods that works within the structure built by the editor. At least not as far as I can tell...

    How do you handle this scenario (if at all)?

    /Chriztian

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  • Søren Kottal 712 posts 4570 karma points MVP 6x c-trib
    May 30, 2019 @ 12:46
    Søren Kottal
    0

    Hi Chriztian

    I have not used MegaNav myself, but it seems like the MeganavItem class has a Content property, where the node of the item is stored (if not external).

    So assuming you do something like this:

    <ul>
  @foreach (var item in Model.Content.GetPropertyValue<IEnumerable<MeganavItem>("mainNavigation")))
{
<li>
...
</li>
}
</ul>

    You should be able to test for ancestors like (Model is the current page rendered) 

    if (item.Content != null && item.Content.IsAncestorOf(Model))
{
   // something to do if current page is in the path of item
}
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  • Chriztian Steinmeier 2800 posts 8790 karma points MVP 8x admin c-trib
    May 30, 2019 @ 12:56
    Chriztian Steinmeier
    0

    Brilliant, Søren — had forgot about the Is* helpers, actually.

    Will try it out right away.

    /Chriztian

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  • Chriztian Steinmeier 2800 posts 8790 karma points MVP 8x admin c-trib
    May 30, 2019 @ 13:21
    Chriztian Steinmeier
    0

    Ah, but no :(

    I forgot the original problem again: Because the Meganav structure can be totally different from the actual content structure, I really can't use IsAncestorOf() etc.

    E.g.:

    Even with a simple content structure like this:

    Home
  - About
  - Products

    I can create a Meganav structure that looks like this:

    Our company
  - Who we are (link to /about/)
Our products
  - All of them (link to /products/)

    When rendering the Products page, I need to set a .currentpath class (or similar) on the Our products item and I can't get that info without traversing the actual Meganav model...

    /Chriztian

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  • Søren Kottal 712 posts 4570 karma points MVP 6x c-trib
    May 30, 2019 @ 13:30
    Søren Kottal
    100

    How about this?

    if (item.Children.SelectRecursive(x => x.Children).Select(x => x.Id).Contains(Model.Id)

    This one gets all descendants id's of item, and then checks if the current node's id (Model.Id) is one of them.

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  • Chriztian Steinmeier 2800 posts 8790 karma points MVP 8x admin c-trib
    May 30, 2019 @ 13:41
    Chriztian Steinmeier
    0

    It's works!

    Never heard of SelectRecursive() before - but it's perfect here :)

    Thanks a ton!

    (Thankfully, the Meganav allows setting a max. level, so I don't think there will be any performance concerns with this.)

    /Chriztian

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  • Søren Kottal 712 posts 4570 karma points MVP 6x c-trib
    May 30, 2019 @ 18:39
    Søren Kottal
    0

    Haha, I never used it before - but Intellisense is your friend :)

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