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Class HierarchicalPageLoader

Serves as a support class for loading hierarchical page structures. This class is used in Hierarchical controls like PageTreeData deriving classes and PageDataSource classes.

Inheritance
System.Object
HierarchicalPageLoader
Inherited Members
System.Object.ToString()
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
Namespace: EPiServer.Web.WebControls
Assembly: EPiServer.dll
Version: 8.11.0
Syntax
public class HierarchicalPageLoader : IHierarchicalPageDataSource, IPageSource

Constructors

HierarchicalPageLoader()

Declaration
public HierarchicalPageLoader()

HierarchicalPageLoader(IContentRepository)

Declaration
public HierarchicalPageLoader(IContentRepository contentRepository)
Parameters
Type Name Description
IContentRepository contentRepository

Properties

AccessLevel

Gets/sets the page access level for datasource.

Declaration
public AccessLevel AccessLevel { get; set; }
Property Value
Type Description
AccessLevel

The page access level.

EvaluateHasChildren

Gets or sets whether the hierarchical view should preevaluate the existens of child pages or always return true to let the HierarchicalDataBoundControl evaluate it as needed.

Declaration
public bool EvaluateHasChildren { get; set; }
Property Value
Type Description
System.Boolean

GetChildrenCallback

Gets or sets the method used to retreive children for a specific page.

Declaration
public HierarchicalPageLoader.GetChildrenMethod GetChildrenCallback { get; set; }
Property Value
Type Description
HierarchicalPageLoader.GetChildrenMethod

A GetChildrenMethod instance.
Remarks

If GetChildrenCallback is undefined, the GetChildren(PageReference) method of DataFactory is used.

GetPageCallback

Gets or sets the method used for retreiving page data for a specific page.

Declaration
public HierarchicalPageLoader.GetPageMethod GetPageCallback { get; set; }
Property Value
Type Description
HierarchicalPageLoader.GetPageMethod

A GetPageMethod instance.
Remarks

If no callback is provided the GetPage(PageReference) method will be used.

IncludeRootPage

Gets or sets a value indicating whether the root page should be included in the hierarchy or not.

Declaration
public bool IncludeRootPage { get; set; }
Property Value
Type Description
System.Boolean

true if root page should be included in the hierarchy; otherwise, false.

InitializeCallback

Gets or sets the method used to initialize the the Loader instance.

Declaration
public HierarchicalPageLoader.InitializeMethod InitializeCallback { get; set; }
Property Value
Type Description
HierarchicalPageLoader.InitializeMethod

A InitializeMethod instance.

Gets or sets the root page for a hierarchical view.

Declaration
public PageReference PageLink { get; set; }
Property Value
Type Description
PageReference

Methods

ExecFilters(PageDataCollection)

Execs the filters registered in Filter on a collection of PageData.

Declaration
public void ExecFilters(PageDataCollection pages)
Parameters
Type Name Description
PageDataCollection pages

The collection of PageData.

GetFilteredChildren(PageReference)

Gets the filtered children of a specified page. Used when retreiving data for a hierarchical view.

Declaration
public PageDataCollection GetFilteredChildren(PageReference pageLink)
Parameters
Type Name Description
PageReference pageLink

pagelink representing the current node in the tree view
Returns
Type Description
PageDataCollection

A collection of child pages

HierarchicalSelect(String)

Performs the selection of pages based on the viewPath parameter.

Declaration
public virtual PageHierarchicalEnumerable HierarchicalSelect(string viewPath)
Parameters
Type Name Description
System.String viewPath

The hierarchical path of the node to enumerate.
Returns
Type Description
PageHierarchicalEnumerable

An IHierarchicalEnumerable representing the child structure of the specified path.
Remarks

Override this method to implement custom hierarchical behavior.

IsRoot(PageData)

Determines if a PageData instance represents a root in the current hierarchicla view.

Declaration
public virtual bool IsRoot(PageData page)
Parameters
Type Name Description
PageData page

The PageData instance to match with.
Returns
Type Description
System.Boolean

true if instance is a root node in the hierarchy, otherwise false.

Events

Filter

Occurs when child page data has been loaded. Typically you attach an eventhandler to this event in order to exclude part of the result or sort the result.

Declaration
public event FilterEventHandler Filter
Event Type
Type Description
FilterEventHandler

Explicit Interface Implementations

IPageSource.CurrentPage

Declaration
PageData IPageSource.CurrentPage { get; }
Returns
Type Description
PageData

IPageSource.GetChildren(PageReference)

Declaration
PageDataCollection IPageSource.GetChildren(PageReference pageLink)
Parameters
Type Name Description
PageReference pageLink
Returns
Type Description
PageDataCollection

IPageSource.GetPage(PageReference)

Declaration
PageData IPageSource.GetPage(PageReference pageLink)
Parameters
Type Name Description
PageReference pageLink
Returns
Type Description
PageData

Implements

Extension Methods