IPublishedContent Collections

    All collections of IPublishedContent are IEnumerable<IPublishedContent>. This means that all c# LINQ statements can be used to filter and query the collections.

    Collections

    .Children

    Returns a collection of items below the current content item

    <ul>
    @foreach(var item in Model.Content.Children)
    {
        <li><a href="@item.Url">@item.Name</a></li>
    }
</ul>

    .Ancestors

    Returns all ancestors of the current page (parent page, grandparent and so on)

    <ul>
    @*Order items by their Level*@
    @foreach(var item in Model.Content.Ancestors().OrderBy(x => x.Level))
    {
        <li><a href="@item.Url">@item.Name</a></li>
    }
</ul>

    .Ancestor

    Returns the first ancestor of the current page

    @* return the first ancestor item from the current page *@
var nodes = Model.Content.Ancestor();

@* return the first item, of a specific type, from the current page *@
var nodes = Model.Content.Ancestor<DocumentTypeAlias>();

    .AncestorsOrSelf

    Returns a collection of all ancestors of the current page (parent page, grandparent and so on), and the current page itself

    @* Get the top item in the content tree, this will always be the Last ancestor found *@
var websiteRoot = Model.Content.AncestorsOrSelf().Last();

    .Descendants

    Returns all descendants of the current page (children, grandchildren etc)

    <ul>
    @* Filter collection by content that has a template assigned *@
    @foreach(var item in Model.Content.Descendants().Where(x = x.TemplateId > 0))
    {
        <li><a href="@item.Url">@item.Name</a></li>
    }
</ul>

    .DescendantsOrSelf

    Returns all descendants of the current page (children, grandchildren etc), and the current page itself

    <ul>
    @* Filter collection by content that has a template assigned *@
    @foreach(var item in Model.Content.DescendantsOrSelf().Where(x = x.TemplateId > 0))
    {
        <li><a href="@item.Url">@item.Name</a></li>
    }
</ul>

    .OfTypes

    Filters a collection of content by content type alias

    <ul>
    @* Filter collection by content type alias (you can pass in any number of aliases) *@
    @foreach(var item in Model.Content.DescendantsOrSelf().OfTypes("widget1", "widget2"))
    {
        <li><a href="@item.Url">@item.Name</a></li>
    }
</ul>

    Filtering, Ordering & Extensions

    Filtering and Ordering are done with LINQ.

    Some examples:

    .Where

    @* Returns all items in the collection that have a template assigned and have a name starting with 'S' *@
var nodes = Model.Content.Descendants().Where(x => x.TemplateId > 0 && x.Name.StartsWith("S"))

    .OrderBy

    @* Orders a collection by the property name "title" *@
var nodes = Model.Content.Children.OrderBy(x => x.GetPropertyValue<string>("title"))

    .GroupBy

    Groups collection by content type alias

    @{
    var groupedItems = Model.Content.Descendants().GroupBy(x => x.DocumentTypeAlias);
    foreach (var group in groupedItems)
    {
        <h2>@group.Key</h2>
        foreach(var item in group)
        {
            <h3>@item.Name</h3>
        }
    }
}

    .Take(int)

    Return only the number of items for a collection specified by the integer value.

    @* return the first 3 items from the child collection *@
var nodes = Model.Content.Children.Take(3);

    .Skip(int)

    Return items from the collection after skipping the specified number of items.

    @* Skip the first 3 items in the collection and return the rest *@
var nodes = Model.Content.Children.Skip(3);

    You can combine Skip and Take when using for paging operations

    @* using skip and take together you can perform paging operations *@
var nodes = Model.Content.Skip(10).Take(10);

    .Count()

    Returns the number of items in the collection

    int numberOfChildren =  Model.Content.Children.Count();

    .Any()

    Returns a boolean True/False value determined by whether there are any items in the collection

    bool hasChildren =  Model.Content.Children.Any();

    Filtering Conventions

    Some filtering and routing behaviour is dependent upon a set of special naming conventions for certain properties. See also: Routing Property Conventions

    .IsVisible()

    If you create a checkbox property on a document type with an alias umbracoNaviHide then the value of this property is used by the IsVisible() extension method when filtering.

    IEnumerable<IPublishedContent> sectionPages =  Model.Content.Children.Where(x => x.IsVisible());

    Use case: When displaying a navigation menu for a section of the site, following this convention gives editors the option to 'hide' certain pages from appearing in the section navigation. (hence the unusual umbracoNaviHide property alias!)