Class HierarchyPropertyDescriptor

Represents a class that holds information of type and property name of data objects. TreeView generates the child nodes based ChildPropertyName if the type of data object matches TargetType.

Inheritance

System.Object

HierarchyPropertyDescriptor

Namespace: Syncfusion.UI.Xaml.TreeView.Engine

Assembly: Syncfusion.SfTreeView.WPF.dll

Syntax

public class HierarchyPropertyDescriptor : Object

Constructors

HierarchyPropertyDescriptor()

Declaration

public HierarchyPropertyDescriptor()

Properties

ChildPropertyName

Gets or sets the property name based on that child nodes created for a node in treeview.

Declaration

public string ChildPropertyName { get; set; }

Property Value

Type	Description
System.String	The property name of the child.

IsExpandedPropertyName

Gets or sets property name which is associated with expanded/collapsed state of the node.

Declaration

public string IsExpandedPropertyName { get; set; }

Property Value

Type	Description
System.String	The underlying property name associated with expanded/collapsed state of node.

Remarks

This is applicable for bound mode alone. Also this will accept only boolean property, otherwise exception will be thrown.

Examples

This example demonstrates how to set IsExpandedPropertyName in both XAML.

<syncfusion:SfTreeView x:Name="treeView"
        ItemsSource="{Binding Folders}">
    <syncfusion:SfTreeView.HierarchyPropertyDescriptors>
        <treeviewengine:HierarchyPropertyDescriptor ChildPropertyName = "Files" TargetType="local:Folder" IsExpandedPropertyName ="IsFolderOpen"/>
        <treeviewengine:HierarchyPropertyDescriptor ChildPropertyName = "SubFiles" TargetType="local:File" IsExpandedPropertyName ="IsFileOpen"/>
    </syncfusion:SfTreeView.HierarchyPropertyDescriptors>
</syncfusion:SfTreeView>

See Also

NodePopulationMode

IsSelectedPropertyName

Gets or sets property name in data object which is associated with selection state of the node.

Declaration

public string IsSelectedPropertyName { get; set; }

Property Value

Type	Description
System.String	The underlying property name in data object associated with selection state of node.

Remarks

IsSelectedPropertyName mapping with selection state of the node is applicable only when treeview populated using Syncfusion.UI.Xaml.TreeView.Engine and it not applicable when treeview populated using Nodes. Also, type of IsSelectedPropertyName property in data object should be of type bool, otherwise exception is thrown.
SelectedItems are updated based on the IsSelectedPropertyName property value in data object, only for the nodes populated. When NodePopulationMode is OnDemand, only visible nodes are populated, so SelectedItems updated only based on visible nodes and it will get further updated when the user expand the nodes further. It is recommended to set NodePopulationMode as Instant where all level of nodes are populated in initial load itself.So, When NodePopulationMode is Instant, SelectedItems are updated based on all the nodes including nodes which are not visible. Changing the IsSelectedPropertyName property value in data object at runtime is not supported.

Examples

This example demonstrates how to set IsSelectedPropertyName in both XAML.

<syncfusion:SfTreeView x:Name="treeView"
        ItemsSource="{Binding Folders}">
           <syncfusion:SfTreeView.HierarchyPropertyDescriptors>
               <treeviewengine:HierarchyPropertyDescriptor ChildPropertyName = "Files"
TargetType="local:Folder"
IsSelectedPropertyName ="IsSelected"/>
               <treeviewengine:HierarchyPropertyDescriptor ChildPropertyName = "SubFiles"
TargetType="local:File"
IsSelectedPropertyName ="IsSelected"/>
           </syncfusion:SfTreeView.HierarchyPropertyDescriptors>
</syncfusion:SfTreeView>

See Also

SelectionMode

TargetType

Gets or sets the type of data object bound with nodes of the Syncfusion.UI.Xaml.TreeView.

Declaration

public Type TargetType { get; set; }

Property Value

Type	Description
System.Type	The type of the data object bounded.