Hi Dennis,

You have to extend your if statement to also check if the category is a parent of your current category. I would write a helper that can check every category from current node to topnode. 

It could be done in this way:

public bool IsParentOf(Category parentCandidate, Category child)
{
    var cat = child.Parent;

    while (cat != null)
    {
        if (cat == parentCandidate)
        {
            return true;
        }
        else
        {
            cat = cat.ParentCategory;
        }
    }
    return false;
}  

I have not tested the code but something similar should do it.

If you have any questions just ask :)

EDIT: 
Then you extend this line:

if(currentCategory !=null&& currentCategory.CategoryId== category.CategoryId)

with:

if(currentCategory !=null&& currentCategory.CategoryId== category.CategoryId || IsParentOf(category, currentCategory)) 

Best regards
Martin 

Hi Martin,

I have tried your code, but I get that the IsParentOf can not be resolve, so maybe I have placed helper method at the wrong place?

My code looks like this now:

@using UCommerce.Api
@using UCommerce.EntitiesV2
@using UCommerce.Extensions
@using UCommerce.Runtime


@helper bool IsParentOf(Category parentCandidate, Category child){

    var cat = child.ParentCategory;

    while (cat != null)
    {
        if (cat == parentCandidate)
        {
            return true;
        }
        else
        {
            cat = cat.ParentCategory;
        }
    }
    return false;
 }

@helper RenderNavigation(ICollection<Category> categories){

    if (categories.Any()){


        <ul class="nav nav-list">
            @foreach (var category in categories.OrderBy(x => x.SortOrder)) {
                var currentCategory = SiteContext.Current.CatalogContext.CurrentCategory;

                var css = "";


               if(currentCategory !=null&& currentCategory.CategoryId== category.CategoryId || IsParentOf(category, currentCategory)) 
                {
                    css = " class=\"selected\"";
                }

                <li @Html.Raw(css)>

                    <span>                
                        <a href="@CatalogLibrary.GetNiceUrlForCategory(category)">@category.DisplayName()</a>
                     </span>
                    @RenderNavigation(category.Categories)


                </li>

            }
        </ul>
    }
}

@{
    var allowedProductCatalog = umbraco.cms.businesslogic.member.Member.GetCurrentMember().getProperty("allowedProductCatalog").Value;
    @RenderNavigation(CatalogLibrary.GetRootCategories(Convert.ToInt32(allowedProductCatalog)))
}

Maybe you can spot what I´am doing wrong.

/Dennis

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