Class PageTreeData

Base data control for accessing page tree's PageControlBase

Inheritance

System.Object

PageTreeData

MenuList

PageTree

Implements

System.Collections.Generic.IEnumerable<PageData>

System.Collections.IEnumerable

IPageSource

IPageControl

Namespace: EPiServer.Web.WebControls

Assembly: EPiServer.dll

Version: 9.12.2

Syntax

public class PageTreeData : Control, IEnumerable<PageData>, IEnumerable, IPageSource, IPageControl

Remarks

You can derive from this class to create custom controls generating any type of trees.

Constructors

PageTreeData()

Initializes a new instance of the PageTreeData class.

Declaration

public PageTreeData()

Properties

AutoBind

Gets or sets a value indicating whether the control should DataBind automatically before rendering if the state of the control allows it.

Declaration

public bool AutoBind { get; set; }

Property Value

Type	Description
System.Boolean	`true` if control should DataBind automatically; otherwise, `false`.

CurrentPage

The current PageData.

Declaration

public PageData CurrentPage { get; }

Property Value

Type	Description
PageData

EnableVisibleInMenu

Gets or sets whether the tree should filter page based on the "Visible in menus" property.

Declaration

public bool EnableVisibleInMenu { get; set; }

Property Value

Type	Description
System.Boolean

EvaluateHasChildren

Gets or sets a value indicating whether a page should do an evaluation to see if it has children.

Declaration

public bool EvaluateHasChildren { get; set; }

Property Value

Type	Description
System.Boolean	`true` if a page should do an evaluation to see if it has children; otherwise, `false`.

Remarks

Turning this check on results in a performance penalty since each page has to check for children.

ExpandAll

Expand all tree nodes.

Declaration

public bool ExpandAll { get; set; }

Property Value

Type	Description
System.Boolean

Remarks

If ExpandAll is false, the branch where CurrentPage is located in is expanded. To find the right branch a search is being made from CurrentPage and up, towards the root page. Note, if a non-published page is encountered during the search and the current user is not allowed to access the page, the search fails and a login prompt is shown to the user.

If ExpandAll is true, all branches are expanded. The pages in the tree are crawled from top to bottom. If a non-published page is encountered in a branch and the current user is not allowed to access the page, that particular branch is not expanded any further.

FilterPagesWithoutTemplate

Gets or sets whether pages that does not have a template should be removed.

Declaration

public bool FilterPagesWithoutTemplate { get; set; }

Property Value

Type	Description
System.Boolean

Remarks

Default value is true.

NumberOfLevels

Number of levels to show in tree.

Declaration

public int NumberOfLevels { get; set; }

Property Value

Type	Description
System.Int32

OpenPages

The pages that should be expanded

Declaration

public PageReferenceCollection OpenPages { get; }

Property Value

Type	Description
PageReferenceCollection

OpenTopPage

Gets the open top page.

Declaration

public PageReference OpenTopPage { get; }

Property Value

Type	Description
PageReference	The open top page.

PageLink

The root page to read data from

Declaration

public PageReference PageLink { get; set; }

Property Value

Type	Description
PageReference

Examples

This example shows how to assign a value to the PageLink property of the PageTree control through code. This code is a modified version of the UserControl prefix.ascx.cs code-behind file in the EPiServer sample site.

We cannot assign to the PageLink property in the Page_Load event as it will be to late for the control to see it. Instead we use the Control.Init event.

        private void Page_Init(object sender, System.EventArgs e)
{
    // Set the tree to start at the site start page
    PageDataTree.PageLink = EPiServer.Core.PageReference.StartPage;
}

private void Page_Load(object sender, System.EventArgs e)
{
    //if (((EPiServer.PageBase)Page).CurrentPage["ListingContainer"] == null)
    //    MainBodyWidth = 410 + 170;
    // This is too late, we need to change the PageLink property in the Page_Init method
    // Pagedatatree1.PageLink = ((EPiServer.PageBase)Page).Configuration.StartPage;
}

private void InitializeComponent()
{
    this.Load += new System.EventHandler(this.Page_Load);
    this.Init += new System.EventHandler(this.Page_Init);
}

PageLinkProperty

Set PageLinkProperty to automatically populate PageLink from a given property.

Declaration

public string PageLinkProperty { get; set; }

Property Value

Type	Description
System.String

Remarks

Set to the name of the page property that you want to fetch the page link from.

Examples

This code snippet assumes that CalendarContainer is defined as a page type property of type Page reference.

<episerver:Calendar PageLinkProperty="CalendarContainer" runat="server" ID="Calendar1" />

PageLoader

Gets an HierarchicalPageLoader that is used for hierarchically loading pages.

Declaration

public HierarchicalPageLoader PageLoader { get; }

Property Value

Type	Description
HierarchicalPageLoader	A HierarchicalPageLoader.

Remarks

By default, the loader will use the GetPage and GetChildren methods of the DataFactory to load a page and child pages for a given PageReference. This default behavior can be changed by setting the GetPageCallback and GetChildrenCallback properties.

PageSource

Set or get where pages will be fetched from, defaults to base page on databind.

Declaration

public IPageSource PageSource { get; set; }

Property Value

Type	Description
IPageSource

Remarks

Normally you never need to modify PageSource, it will automatically be set.

PropertyResolver

Gets or sets the PropertyResolver that should be used by the current control instance.

Declaration

protected Injected<PropertyResolver> PropertyResolver { get; set; }

Property Value

Type	Description
Injected<PropertyResolver>

PublishedStatus

Set or get the level of "publish status" filtering that will be done.

Declaration

public PagePublishedStatus PublishedStatus { get; set; }

Property Value

Type	Description
PagePublishedStatus

Remarks

By default it will be set to Published, i e only pages that are published and is within the valid publish date range will be included.

RequiredAccess

Set or get the level of access rights filtering that will be done.

Declaration

public AccessLevel RequiredAccess { get; set; }

Property Value

Type	Description
AccessLevel

Remarks

By default it will be set to AccessLevel.Read, i e only pages that you have read access to will be included.

RootLink

Gets the PageReference that represents the root of the tree.

Declaration

public PageReference RootLink { get; }

Property Value

Type	Description
PageReference

ShowRootPage

Gets or sets wheter to render the root page as part of the tree

Declaration

public virtual bool ShowRootPage { get; set; }

Property Value

Type	Description
System.Boolean

Remarks

This setting is only useful when data is data bound to another control that does rendering of the tree structure.

SortBy

Gets or sets custom sorting on a property instead of using predefined sorting by setting SortOrder

Declaration

public string SortBy { get; set; }

Property Value

Type	Description
System.String

SortDirection

Direction for sorting listings specified by SortBy

Declaration

public FilterSortDirection SortDirection { get; set; }

Property Value

Type	Description
FilterSortDirection

SortOrder

Predefined sort orders instead of using custom sorting by setting SortBy

Declaration

public FilterSortOrder SortOrder { get; set; }

Property Value

Type	Description
FilterSortOrder

Methods

Collapse(PageReference)

Collapse tree node, will automatically expand all parent nodes up to root page.

Declaration

public virtual void Collapse(PageReference closePage)

Parameters

Type	Name	Description
PageReference	closePage	Page node to collapse.

CreatePostSortFilters()

Called once when the control needs access to post sort filters used for modifying a PageDataCollection.

Declaration

protected virtual void CreatePostSortFilters()

Remarks

Override this method to customize the population of filters to run after sorting occurs.

Typical use is to limit the number of pages, for example by using FilterCount or FilterSkipCount

CreatePreSortFilters()

Called once when the control needs access to pre sort filters used for modifying a PageDataCollection.

Declaration

protected virtual void CreatePreSortFilters()

Remarks

Override this method to customize the population of filters to run before sorting occurs.

Typical use is to add pages to create a combined list from two or more folders, or to remove pages based that should not appear in listing. For example by using FilterCompareTo

CreateSortFilters()

Called once when the control needs access to sort filters used for modifying a PageDataCollection.

Declaration

protected virtual void CreateSortFilters()

Remarks

Override this method to customize the population of sorting filters.

Typically used to change the order between pages, for example with FilterPropertySort.

CreateTemplateControl(PageData, ITemplate, Int32, Boolean)

Creates a template control based on template which is served with data from a PageData instance. If template is null no Control is added.

Declaration

protected void CreateTemplateControl(PageData page, ITemplate template, int level, bool hasChildren)

Parameters

Type	Name	Description
PageData	page	The page.
System.Web.UI.ITemplate	template	The template.
System.Int32	level	The indent level of the page.
System.Boolean	hasChildren	Specifies whether the page has children or not.

DataBind()

Binds a data source to the invoked server control and all its child controls.

Declaration

public override void DataBind()

Expand(PageReference)

Expand tree node, will automatically expand all parent nodes up to root page.

Declaration

public virtual void Expand(PageReference openPage)

Parameters

Type	Name	Description
PageReference	openPage	Page node to expand.

GetChildren(PageReference)

Retrieve a PageData listing

Declaration

public PageDataCollection GetChildren(PageReference pageLink)

Parameters

Type	Name	Description
PageReference	pageLink	Reference to parent page

Returns

Type	Description
PageDataCollection	Returns a collection of pages directly below the page referenced by the PageReference parameter.

Examples

  The following code example demonstrates the usage of <strong>GetChildren</strong>.

            IContentRepository factory =  DataFactory.Instance;
PageReference parent = PageReference.StartPage; 
IEnumerable<PageData> pages = factory.GetChildren<PageData>(parent);
Response.Write("Count of pages: " + pages.Count());

GetEnumerator()

Returns an enumerator that iterates through the PageTreeData.

Declaration

public IEnumerator<PageData> GetEnumerator()

Returns

Type	Description
System.Collections.Generic.IEnumerator<PageData>	A System.Collections.Generic.IEnumerator<EPiServer.Core.PageData> that can be used to iterate through the collection.

GetExpandedPages(PageReference)

Gets the expanded pages.

Declaration

protected virtual List<PageReference> GetExpandedPages(PageReference pageLink)

Parameters

Type	Name	Description
PageReference	pageLink

Returns

Type	Description
System.Collections.Generic.List<PageReference>

GetPage(PageReference)

Retrieves a PageData object with information about a page, based on the PageReference parameter.

Declaration

public PageData GetPage(PageReference pageLink)

Parameters

Type	Name	Description
PageReference	pageLink	Reference to the page being retrieved

Returns

Type	Description
PageData	PageData object requested

Examples

  The following code example demonstrates how to get a start page.

            IContentRepository factory = DataFactory.Instance;
PageData page = factory.Get<PageData>(PageReference.StartPage);
Response.Write(page.PageName);

        The following code example demonstrates how to get a page by ID.

            IContentRepository factory = DataFactory.Instance;
PageData page = factory.Get<PageData>(new PageReference(30));
Response.Write(page.PageName);

GetRootLink()

Gets a PageReference that represents the root of the tree. This method considers (in order) PageLinkProperty, PageLink and CurrentPage to establish the root. Override this method to add your own root lookup mechanism.

Declaration

protected virtual PageReference GetRootLink()

Returns

Type	Description
PageReference	A PageReference representing the root in the tree.

IsExpanded(PageReference)

Determines whether the specified page is expanded. A page is considered expanded if the page is parent of the current page or the same as the current page and is part of the hierarchy having RootLink as root.

Declaration

protected virtual bool IsExpanded(PageReference page)

Parameters

Type	Name	Description
PageReference	page	The page.

Returns

Type	Description
System.Boolean	`true` if the specified page is expanded; otherwise, `false`.

IsExpanded(PageReference, PageHierarchyData)

Declaration

protected virtual bool IsExpanded(PageReference pageLink, PageHierarchyData pageHierarchyData)

Parameters

Type	Name	Description
PageReference	pageLink	The page link.
PageHierarchyData	pageHierarchyData	The page hierarchy data, used to check for children. If null PageSource is used to check for children instead

Returns

Type	Description
System.Boolean	`true` if the specified page link is expanded; otherwise, `false`.

OnPreRender(EventArgs)

Raises the System.Web.UI.Control.PreRender event.

Declaration

protected override void OnPreRender(EventArgs e)

Parameters

Type	Name	Description
System.EventArgs	e	An System.EventArgs object that contains the event data.

SetLoaderProperties()

Sets the loader properties. This method must be called prior to handing out the loader to the Hierarchical object model (PageHierarchicalEnumerable, PageHierarchicalView etc.)

Declaration

protected virtual void SetLoaderProperties()

Events

Filter

Exposes the Filter event of the underlying HierarchicalPageLoader.

Declaration

public event FilterEventHandler Filter

Event Type

Type	Description
FilterEventHandler

Explicit Interface Implementations

IEnumerable.GetEnumerator()

Declaration

IEnumerator IEnumerable.GetEnumerator()

Returns

Type	Description
System.Collections.IEnumerator

Implements

System.Collections.Generic.IEnumerable<T>

System.Collections.IEnumerable

IPageSource

IPageControl

Extension Methods

IdentityObjectExtensions.GetIdentity(Object)

IdentityObjectExtensions.SetIdentity(Object, Identity)

PropertyBagObjectsExtensions.ToPropertyBag(Object)

PropertyBagObjectsExtensions.ToPropertyBag(Object, IEnumerable<String>)

RuntimeModelExtensions.GetOriginalType(Object)