Class GridTreeControl

A ContentControl derived class that aggregates the functionality of a GridTreeControlImpl object into a ContentControl. GridTreeControlImpl is a GridControl derived class that displays multicolumn tree data in a tree-like grid. You populate the tree by handling a single event, RequestTreeItems in which you return a list of objects that belong to a particular node. GridTreeControl wraps this tree grid into a ContentControl object that allows you access to its control Template.

Inheritance
System.Object
GridTreeControl
GanttGrid
Implements
System.IDisposable
Namespace: Syncfusion.Windows.Controls.Grid
Assembly: Syncfusion.Grid.Wpf.dll
Syntax
public class GridTreeControl : ContentControl, IDisposable
Remarks

While handling RequestTreeItems is the only thing required for data to appear in your tree, you can use additional property setting to customized the look and feel of the tree. You use the Columns collection to define content and order of the multiple columns appearing in the tree. For each column, you can specify Column.StyleInfo which is a GridStyleInfo object that controls the grid cell display properties (like BackColor, Format, Fonts, etc.) of a the column.

The TreeGridControl also supports sorting by clicking on a column header. There are also tree-wide properties like ReadOnly, SupportRowSizing, MarkRowBrush, ColumnHeaderStyle, FreezeExpandColumn, LevelStyles, RowHeaderWidth, ShowColumnHeaders, ShowColumnHeaderBorders, AllowSorting and ShowRowHeaders that allow you to control the look and feel of the tree grid.

The TreeGridControlImpl is bound to a collection of GridNode objects found in TreeGridControl.Nodes. There is a one to one mapping between the rows in the underlying GridControl and GridNodes in TreeGridControlImpl.Nodes. Given a GridNode, you can get at the underlying data object passed in via the RequestTreeItems event by referencing GridNode.Item. The property, GridTreeControl.InternalGrid gives you access to the associated TreeGridControlImpl object.

Constructors

GridTreeControl()

Default constructor.

Declaration
public GridTreeControl()

Fields

AllowDragColumnsProperty

DependencyProperty for AllowDragColumns.

Declaration
public static readonly DependencyProperty AllowDragColumnsProperty
Field Value
Type Description
System.Windows.DependencyProperty

AllowSortProperty

DependencyProperty for AllowSort.

Declaration
public static readonly DependencyProperty AllowSortProperty
Field Value
Type Description
System.Windows.DependencyProperty

AutoGenerateColumnsInfoProperty

Declaration
public static readonly DependencyProperty AutoGenerateColumnsInfoProperty
Field Value
Type Description
System.Windows.DependencyProperty

ChildPropertyNameChangedEvent

Declaration
public static readonly RoutedEvent ChildPropertyNameChangedEvent
Field Value
Type Description
System.Windows.RoutedEvent

ChildPropertyNameProperty

DependencyProperty for ChildPropertyName.

Declaration
public static readonly DependencyProperty ChildPropertyNameProperty
Field Value
Type Description
System.Windows.DependencyProperty

ContextMenuStyleProperty

Declaration
public static readonly DependencyProperty ContextMenuStyleProperty
Field Value
Type Description
System.Windows.DependencyProperty

CustomVisualStyleProperty

DependencyProperty for VisualStyle.

Declaration
public static readonly DependencyProperty CustomVisualStyleProperty
Field Value
Type Description
System.Windows.DependencyProperty

DefaultColumnWidthProperty

DependencyProperty for DefaultColumnWidth.

Declaration
public static readonly DependencyProperty DefaultColumnWidthProperty
Field Value
Type Description
System.Windows.DependencyProperty

EnableLegacyStyleProperty

Declaration
public static readonly DependencyProperty EnableLegacyStyleProperty
Field Value
Type Description
System.Windows.DependencyProperty

EnableRenderOptimizationProperty

DependencyPropery for EnableRenderOptimizationProperty.

Declaration
public static readonly DependencyProperty EnableRenderOptimizationProperty
Field Value
Type Description
System.Windows.DependencyProperty

ExpandGlyphTypeProperty

Declaration
public static readonly DependencyProperty ExpandGlyphTypeProperty
Field Value
Type Description
System.Windows.DependencyProperty

ExpandStateAtStartUpProperty

Declaration
public static readonly DependencyProperty ExpandStateAtStartUpProperty
Field Value
Type Description
System.Windows.DependencyProperty

FooterRowsProperty

Declaration
public static readonly DependencyProperty FooterRowsProperty
Field Value
Type Description
System.Windows.DependencyProperty

FrozenRowsProperty

Declaration
public static readonly DependencyProperty FrozenRowsProperty
Field Value
Type Description
System.Windows.DependencyProperty

HideEmptyChildGlyphsProperty

DependencyProperty for .

Declaration
public static readonly DependencyProperty HideEmptyChildGlyphsProperty
Field Value
Type Description
System.Windows.DependencyProperty

IgnoreResetOnListChangedProperty

Gets or sets whether no action is taken by the GridTreeControl on the occurrence of an IBindingList.ListChangedType.Reset event. If you are binding to a DataTable/DataView, when you call DataTable.AcceptChanges(), the corresponding DataView raises a IBindingList.ListChanged Reset event. When the GridTreeControl responds to this event, its default action is to just reload the entire tree which will cause the expand state of the existing nodes to be lost. So, if you are calling DataTable.AcceptChanges, you can set IgnoreResetOnListChanged = true to avoid losing the existing expand states.

Declaration
public static readonly DependencyProperty IgnoreResetOnListChangedProperty
Field Value
Type Description
System.Windows.DependencyProperty

ItemsSourceChangedEvent

Declaration
public static readonly RoutedEvent ItemsSourceChangedEvent
Field Value
Type Description
System.Windows.RoutedEvent

ItemsSourceProperty

DependencyProperty for ItemsSource.

Declaration
public static readonly DependencyProperty ItemsSourceProperty
Field Value
Type Description
System.Windows.DependencyProperty

NotifyPropertyChangesProperty

DependencyProperty for NotifyPropertyChanges.

Declaration
public static readonly DependencyProperty NotifyPropertyChangesProperty
Field Value
Type Description
System.Windows.DependencyProperty

ParentPropertyNameChangedEvent

Declaration
public static readonly RoutedEvent ParentPropertyNameChangedEvent
Field Value
Type Description
System.Windows.RoutedEvent

ParentPropertyNameProperty

DependencyProperty for ParentPropertyName.

Declaration
public static readonly DependencyProperty ParentPropertyNameProperty
Field Value
Type Description
System.Windows.DependencyProperty

RequestNodeImageEvent

Declaration
public static readonly RoutedEvent RequestNodeImageEvent
Field Value
Type Description
System.Windows.RoutedEvent

RequestTreeItemsEvent

Declaration
public static readonly RoutedEvent RequestTreeItemsEvent
Field Value
Type Description
System.Windows.RoutedEvent

ScrollViewerStyleProperty

Declaration
public static readonly DependencyProperty ScrollViewerStyleProperty
Field Value
Type Description
System.Windows.DependencyProperty

SelectedNodeProperty

DependencyProperty for SelectedNode property.

Declaration
public static readonly DependencyProperty SelectedNodeProperty
Field Value
Type Description
System.Windows.DependencyProperty

ShowRowHeaderProperty

DependencyProperty for ShowRowHeader.

Declaration
public static readonly DependencyProperty ShowRowHeaderProperty
Field Value
Type Description
System.Windows.DependencyProperty

SortClickActionProperty

Declaration
public static readonly DependencyProperty SortClickActionProperty
Field Value
Type Description
System.Windows.DependencyProperty

SortingOptionsProperty

Declaration
public static readonly DependencyProperty SortingOptionsProperty
Field Value
Type Description
System.Windows.DependencyProperty

StyleManagerProperty

Declaration
public static readonly DependencyProperty StyleManagerProperty
Field Value
Type Description
System.Windows.DependencyProperty

TemplateGrid

Name used for the GridTreeControlImpl object in the default template.

Declaration
public const string TemplateGrid = "PART_GridControl"
Field Value
Type Description
System.String

TrackSelectionOnCollectionChangeProperty

Declaration
public static readonly DependencyProperty TrackSelectionOnCollectionChangeProperty
Field Value
Type Description
System.Windows.DependencyProperty

UnboundRowPositionProperty

Declaration
public static readonly DependencyProperty UnboundRowPositionProperty
Field Value
Type Description
System.Windows.DependencyProperty

UnboundRowsCountProperty

Declaration
public static readonly DependencyProperty UnboundRowsCountProperty
Field Value
Type Description
System.Windows.DependencyProperty

UpdateModeProperty

DependencyProperty for UpdateMode property.

Declaration
public static readonly DependencyProperty UpdateModeProperty
Field Value
Type Description
System.Windows.DependencyProperty

VisualStyleProperty

DependencyProperty for VisualStyle.

Declaration
public static readonly DependencyProperty VisualStyleProperty
Field Value
Type Description
System.Windows.DependencyProperty

Properties

AllowAutoSizingNodeColumn

Gets or sets whether the tree node column's width is automatically adjusted as the node levels increase.

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

This property is ignored is PercentageSizing is enabled and the node column is marked to participate in the percentage sizing calculations.

AllowDragColumns

Gets or sets a value indicating whether [allow drag columns].

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

true if [allow drag columns]; otherwise, false.

AllowSort

Gets or sets a value indicating whether [allow sort].

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

true if [allow sort]; otherwise, false.

AutoGenerateColumnsInfo

Gets or sets a value indicating whether to generate the CellType automatically

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

true if [auto generate columns info]; otherwise, false.

AutoPopulateColumns

If AutoPopulateColumns is set to True, then visible column defined will be populated in the View. else all the columns in the itemsource will be populated in the view

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

AutosizingNodeColumnOption

Gets or sets whether Sizing of nodes based on NodeCount or Level

Declaration
public GridNodeAutosizingOption AutosizingNodeColumnOption { get; set; }
Property Value
Type Description
GridNodeAutosizingOption

ChildPropertyName

Declaration
public string ChildPropertyName { get; set; }
Property Value
Type Description
System.String

ColumnHeaderStyle

Gets or sets a GridStyleInfo object that defines the style information for the column headers.

Declaration
public GridStyleInfo ColumnHeaderStyle { get; set; }
Property Value
Type Description
GridStyleInfo

Columns

A collection of the TreeColumns that control the number and order of the columns that appear in the Tree.

Declaration
public ObservableCollection<GridTreeColumn> Columns { get; set; }
Property Value
Type Description
System.Collections.ObjectModel.ObservableCollection<GridTreeColumn>

ContextMenuStyle

Declaration
public Style ContextMenuStyle { get; set; }
Property Value
Type Description
System.Windows.Style

CustomVisualStyle

Gets or sets the visual style.

Declaration
public IGridTreeVisualStyle CustomVisualStyle { get; set; }
Property Value
Type Description
IGridTreeVisualStyle

The visual style.

DefaultColumnWidth

Gets or sets the default width of the column.

Declaration
public double DefaultColumnWidth { get; set; }
Property Value
Type Description
System.Double

The default width of the column.

EnableHotRowMarker

Gets or sets whether the row under the current mouse position is redrawn using the HotRowMarker as a background brush.

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

EnableLegacyStyle

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

EnableMultiColumnSorting

Gets or sets a value indicating whether [enable multi column sorting].

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

true if [enable multi column sorting]; otherwise, false.

EnableNodeSelection

Gets or sets whether your user can select whole row when a cell is clicked with the mouse.

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

Setting this property to true also sets GridTreeControl.InternalGrid.Model.Options.ListBoxSelectionMode to MultiExtended. If you want the selected behavior to be something other than MultiExtended, you will need to explicitly set it after setting this property.

EnableRenderCheckIfGlyphNeeded

Gets or sets whether Sorting are allowed while editing the cells in GridTreeControl.

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

EnableRenderOptimization

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

EnableSelections

Gets or sets whether selections are allowed in teh GridTreeControl.

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

EnableSortOnEdit

Gets or sets whether Sorting are allowed while editing the cells in GridTreeControl.

Declaration
[Obsolete]
public bool EnableSortOnEdit { get; set; }
Property Value
Type Description
System.Boolean

EnableTriStateSorting

Gets or sets a value indicating whether [enable tri state sorting].

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

true if [enable tri state sorting]; otherwise, false.

ExpandGlyphType

Gets or sets the type of the glyph shown in the expand cell.

Declaration
public GridTreeExpandGlyph ExpandGlyphType { get; set; }
Property Value
Type Description
GridTreeExpandGlyph
Remarks

The default value is a triangle. You can also set a +- glyph, or a +-glyph with tree lines, or a custom drawn glyph. The property NodeColumnWidth reserves the required width of your glyph. The default value of NodeColumnWidth is 10 which is the setting used for the triangle glyph. For the +- glyph, the value of NodeColumnWidth is set to 14. If you want to explicitly provide a particular NodeColumnWidth, then you need to explicitly reset its value after you set ExpandGlyphType as setting ExpandGlypType also possibly resets NodeColumnWidth.

ExpandStateAtStartUp

Gets / Sets the ExandStateAtStartUp property.

Declaration
public GridTreeStartUpExpandState ExpandStateAtStartUp { get; set; }
Property Value
Type Description
GridTreeStartUpExpandState

FooterRows

Gets or sets the number of non-scrolling rows at bottom of the GridTreeControl.

Declaration
public int FooterRows { get; set; }
Property Value
Type Description
System.Int32

The number of non-scrolling rows at bottom. The default value is zero.
Remarks

Footer rows are always displayed and it can’t be scrolled out of visibility.

FreezeExpandColumn

Gets of sets whether the column with the expand/contract glyph is scrollable.

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

FrozenRows

Gets or sets the FrozenRows count.

Declaration
public int FrozenRows { get; set; }
Property Value
Type Description
System.Int32

HideEmptyChildGlyphs

Gets or sets whether empty child nodes show the +/- cells when they are initially displayed.

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

true if empty child nodes should not show the +/- ; otherwise, false.
Remarks

The default GridTreeControl raises the RequestTreeItem event for each child node as it becomes visible the first time so the GridTreeControl will not display the +/- for nodes that have no children. If you set this property to false, the GridTreeControl will not raise the RequestTreeItems for the child until the child node is clicked to be expanded. At that point, if the child node has no children, the +/- will go away.

IgnoreResetOnListChanged

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

ItemsSource

Declaration
public object ItemsSource { get; set; }
Property Value
Type Description
System.Object

LevelStyles

Gets or sets a collection of GridStyleInfo objects that will be applied to specific levels.

Declaration
public List<GridStyleInfo> LevelStyles { get; set; }
Property Value
Type Description
System.Collections.Generic.List<GridStyleInfo>

Model

Gets the GridTreeModel model.

Declaration
public GridTreeModel Model { get; }
Property Value
Type Description
Syncfusion.Windows.Controls.Grid.GridTreeModel

The model.

NotifyPropertyChanges

Gets or sets a value indicating whether NotifyPropertyChanges is true / false. Set this to true, GridTreeControl will listen to property changes.

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

true if [notify property changes]; otherwise, false.

ParentPropertyName

Declaration
public string ParentPropertyName { get; set; }
Property Value
Type Description
System.String

PercentSizingBehavior

Gets or sets the percentage sizing behavior in the GridTreeControl.

Declaration
public GridPercentColumnSizingBehavior PercentSizingBehavior { get; set; }
Property Value
Type Description
GridPercentColumnSizingBehavior
Remarks

Set the GridTreeColumn.PercentWidth property to enable a particular column to participate in the automatic sizing as the TreeGridControl client width changes. Depending upon the value of PercentSizingBehavior, the free client width left after all the columns whose PrecentWidth is not set has been subtracted, is proportionally allocated among all those columns whose PercentWidth is set.

ReadOnly

Gets or sets whether the GridTreeControl is ReadOnly.

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

RowHeaderWidth

Gets or sets the width of the row header column.

Declaration
public double RowHeaderWidth { get; set; }
Property Value
Type Description
System.Double

ScrollViewerStyle

Declaration
[Obsolete("Not sure if needed")]
public Style ScrollViewerStyle { get; set; }
Property Value
Type Description
System.Windows.Style

SelectedNode

Gets or sets the selected Node.

Declaration
public object SelectedNode { get; set; }
Property Value
Type Description
System.Object

The selected Node.

SelectedNodes

Gets a collection of the selected nodes within the GridTreeControl.

Declaration
public GridSelectedTreeNodes SelectedNodes { get; }
Property Value
Type Description
GridSelectedTreeNodes
Remarks

If this property is acessed before the InternalGrid has been initialized, it will return null.

SelfRelationRootValue

Gets or sets the value that defines the root object in a self-related tree when ItemsSource is used to define the underlying tree data.

Declaration
public object SelfRelationRootValue { get; set; }
Property Value
Type Description
System.Object

ShowColumnHeaders

Gets or sets whether a header row is visible

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

ShowExpandColumnBorders

Gets or sets whether the grid lines are seen in the expand column.

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

ShowRowHeader

Gets or sets a value indicating whether [show row header].

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

true if [show row header]; otherwise, false.

SortClickAction

Enables/Disables the sorting on mouse double click.

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

The sort click action.

SortingOptions

Declaration
public GridTreeSortingOptions SortingOptions { get; set; }
Property Value
Type Description
GridTreeSortingOptions

SourceType

Declaration
public Type SourceType { get; set; }
Property Value
Type Description
System.Type

StyleManager

Declaration
public GridTreeStyleManager StyleManager { get; set; }
Property Value
Type Description
GridTreeStyleManager

SupportNodeImages

Gets or sets whether an event is raised to request an image to be displayed for a node.

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

SupportRowSizing

Gets or sets whether your user can size row heights with the mouse.

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

SupportsVisualStyles

Gets or sets whether the GridTreeControl should adjust its appearance according to the setting.

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

TrackSelectionOnCollectionChange

Gets or Sets whether to track the selection when the binded collection changed

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

UnboundRowPosition

Gets or sets the UnboundRowPosition

Declaration
public Position UnboundRowPosition { get; set; }
Property Value
Type Description
Position

UnboundRowsCount

Gets or sets the Bnbound Row Count for the Model. This would add additional rows to the Top of the Grid after the Column headers or Bottom of the Grid based on UnboundRowPosition

Declaration
public int UnboundRowsCount { get; set; }
Property Value
Type Description
System.Int32

UpdateMode

Gets or sets the update mode.

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

The update mode.

VisualStyle

Gets or sets the visual style.

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

The visual style.

Methods

AutoPopulateColumnInfo()

This method is only called if the Columns collection has not been explicitly populated by the user before the initial raising of the RequestTreesItems event in OnLoad.

Declaration
public void AutoPopulateColumnInfo()

CollapseAllNodes()

Collapses all expanded nodes.

Declaration
public void CollapseAllNodes()

CollapseAllNodes(GridTreeNode)

Collapse all passed-in node as well as child nodes of the passed-in node.

Declaration
public void CollapseAllNodes(GridTreeNode n)
Parameters
Type Name Description
GridTreeNode n

The node to be collapsed.

CollapseNode(GridTreeNode)

Collapses a single node.

Declaration
public void CollapseNode(GridTreeNode n)
Parameters
Type Name Description
GridTreeNode n

The node to be collapsed.

CollapseNode(Int32)

Collapse the GridNode that corresponds to the given grid row index.

Declaration
public void CollapseNode(int gridRowIndex)
Parameters
Type Name Description
System.Int32 gridRowIndex

The rowIndex of the GridNode to be collapsed.

Dispose()

Declaration
public void Dispose()

ExpandAllNodes()

Expand all nodes.

Declaration
public void ExpandAllNodes()

ExpandAllNodes(GridTreeNode)

Expands the given node and all of its child nodes.

Declaration
public void ExpandAllNodes(GridTreeNode n)
Parameters
Type Name Description
GridTreeNode n

The node to be expanded.

ExpandNode(GridTreeNode)

Expands the single node.

Declaration
public void ExpandNode(GridTreeNode n)
Parameters
Type Name Description
GridTreeNode n

The node to be expanded.

ExpandNode(Int32)

Expand the GridNode that corresponds to the given grid row index.

Declaration
public void ExpandNode(int gridRowIndex)
Parameters
Type Name Description
System.Int32 gridRowIndex

The rowIndex of the GridNode to be expanded.

OnApplyTemplate()

Declaration
public override void OnApplyTemplate()

OnCreatingTreeNode(GridTreeCreatingNodeEventArgs)

Raises the CreatingNode event.

Declaration
protected virtual void OnCreatingTreeNode(GridTreeCreatingNodeEventArgs e)
Parameters
Type Name Description
GridTreeCreatingNodeEventArgs e

The event argument.

OnExpandStateChanged(GridTreeNode, GridTreeNodeActions)

Raises the ExpandStateChanged event.

Declaration
public void OnExpandStateChanged(GridTreeNode node, GridTreeNodeActions action)
Parameters
Type Name Description
GridTreeNode node

The node that was clicked.
GridTreeNodeActions action

The action that was taken.

OnExpandStateChanging(GridTreeNode, GridTreeNodeActions)

Raises the ExpandStateChanging event.

Declaration
public bool OnExpandStateChanging(GridTreeNode node, GridTreeNodeActions action)
Parameters
Type Name Description
GridTreeNode node

The node that was clicked.
GridTreeNodeActions action

The action to be taken.
Returns
Type Description
System.Boolean

True if the action should be completed, false otherwise.

OnNodesSorted()

Called after sorting the nodes in GridTreeControl

Declaration
protected virtual void OnNodesSorted()

OnQueryVisibleColumnInfo(GridTreeQueryVisibleColumnInfoEventArgs)

Raises the QueryVisibleColumnInfo event.

Declaration
protected virtual void OnQueryVisibleColumnInfo(GridTreeQueryVisibleColumnInfoEventArgs Args)
Parameters
Type Name Description
GridTreeQueryVisibleColumnInfoEventArgs Args

The GridTreeQueryVisibleColumnInfoEventArgs instance containing the event data.

Populate()

Call this method to repopulate a GridTreeControl if the GridTreeControl has been previously reset to an empty tree by calling the Reset() method.

Declaration
public void Populate()
Remarks

If you are using the RequestTreeItems event to populate your tree, just calling Populate() will raise the appropriate events. But if you are populating the tree by setting an ItemsSource property (along with possibly a ChildPropertyName, ParentPropertyName, or SelfRelationRootValue), then you also must set these properties properly before calling the Populate method.

RaiseCreatingTreeNode(GridTreeCreatingNodeEventArgs)

Raises the CreatingTreeNode event.

Declaration
public void RaiseCreatingTreeNode(GridTreeCreatingNodeEventArgs e)
Parameters
Type Name Description
GridTreeCreatingNodeEventArgs e

The event argument.

RaiseQueryVisibleColumnInfo(GridTreeQueryVisibleColumnInfoEventArgs)

Raises the query visible column info.

Declaration
public void RaiseQueryVisibleColumnInfo(GridTreeQueryVisibleColumnInfoEventArgs e)
Parameters
Type Name Description
GridTreeQueryVisibleColumnInfoEventArgs e

The GridTreeQueryVisibleColumnInfoEventArgs instance containing the event data.

RaiseRequestNodeImage(GridTreeRequestNodeImageEventArgs)

Declaration
public void RaiseRequestNodeImage(GridTreeRequestNodeImageEventArgs e)
Parameters
Type Name Description
GridTreeRequestNodeImageEventArgs e

RaiseRequestTreeItems(GridTreeRequestChildListEventArgs)

Declaration
public void RaiseRequestTreeItems(GridTreeRequestChildListEventArgs e)
Parameters
Type Name Description
GridTreeRequestChildListEventArgs e

Reset()

This method clears the GridTreeControl of all nodes and column schema information.

Declaration
public void Reset()
Remarks

If you are using an ItemsSource property (along with possibly a ChildPropertyName, ParentPropertyName, or SelfRelationRootValue), then these properties will also be reset by a call to this Reset method.

Events

ChildPropertyNameChanged

Declaration
public event GridRoutedEventHandler ChildPropertyNameChanged
Event Type
Type Description
GridRoutedEventHandler

CreatingTreeNode

Event which is raised as GridTreeNodes are created so derived tree nodes can be used.

Declaration
public event GridTreeCreatingNodeHandler CreatingTreeNode
Event Type
Type Description
GridTreeCreatingNodeHandler

ExpandStateChanged

A notification event that is raised after a node has been expand or collapsed as the result of the user clicking the expand button.

Declaration
public event GridTreeNodeEventHandler ExpandStateChanged
Event Type
Type Description
GridTreeNodeEventHandler

ExpandStateChanging

A cancelable event raised before the expand state of a node changes as a result of the user clicking the expand button.

Declaration
public event GridTreeNodeCancelEventHandler ExpandStateChanging
Event Type
Type Description
GridTreeNodeCancelEventHandler

ItemsSourceChanged

Declaration
public event GridRoutedEventHandler ItemsSourceChanged
Event Type
Type Description
GridRoutedEventHandler

ModelLoaded

Occurs when the Model is loaded and the Template is applied. This is useful to listen to Model events when the control is initialized.

            
            this.treeControl.ModelLoaded += (sender, args) =>
            {
                this.treeControl.Model.QueryCellInfo += new
Syncfusion.Windows.Controls.Grid.GridQueryCellInfoEventHandler(Model_QueryCellInfo);
            };
Declaration
public event EventHandler ModelLoaded
Event Type
Type Description
System.EventHandler

NodesPopulated

Occurs after the Nodes are populated in the Grid.

Declaration
public event EventHandler NodesPopulated
Event Type
Type Description
System.EventHandler

ParentPropertyNameChanged

Declaration
public event GridRoutedEventHandler ParentPropertyNameChanged
Event Type
Type Description
GridRoutedEventHandler

QueryVisibleColumnInfo

Occurs when [query visible column info].

Declaration
public event GridTreeQueryVisibleColumnInfoEventHandler QueryVisibleColumnInfo
Event Type
Type Description
GridTreeQueryVisibleColumnInfoEventHandler

RequestNodeImage

This event is used to request an image for the specified node item. This event is only raised if SupportNodeImages is true.

Declaration
public event GridTreeRequestNodeImageHandler RequestNodeImage
Event Type
Type Description
GridTreeRequestNodeImageHandler

RequestTreeItems

This event is used to request an IEnumerable object that holds the child item objects for a particular parent item.

Declaration
public event GridTreeRequestTreeItemsHandler RequestTreeItems
Event Type
Type Description
GridTreeRequestTreeItemsHandler
Remarks

In order to see data displayed in the TreeGrid, you must handle this event. The events args pass in a parent object, and your event handler needs to provide an IEnumerable object that contains the childs objects for this pareent object. If the parent object is null, you should provide the collection of root objects for the tree.

Implements

System.IDisposable

Extension Methods