Class TreeNodes

A collection of TreeNode elements. The collection maintains both a list of nodes and a binary tree collection with height of nodes and number of rows. When adding, removing or changing nodes this collection ensures the binary tree collection is kept in sync with changes.

The TreeNodes collection is accessed through the ChildNodes property of a TreeNode. TreeNode gets the counters from this collection when determining the total height of nested nodes and also the number of visible nested nodes.

Inheritance
System.Object
TreeNodes
Implements
System.Collections.Generic.IList<TreeNode>
System.Collections.Generic.ICollection<TreeNode>
System.Collections.Generic.IEnumerable<TreeNode>
System.Collections.IEnumerable
System.IDisposable
Namespace: Syncfusion.Windows.Controls.VirtualTreeView
Assembly: Syncfusion.GridCommon.WPF.dll
Syntax
public class TreeNodes : Object, IList<TreeNode>, ICollection<TreeNode>, IEnumerable<TreeNode>, IEnumerable, ITreeTableCounterSource, IDisposable

Constructors

TreeNodes(TreeNode)

Initializes a new instance of the TreeNodes class.

Declaration
public TreeNodes(TreeNode parentNode)
Parameters
Type Name Description
TreeNode parentNode

The parent node.

Properties

Count

Gets the number of nodes contained in the collection (not nested nodes).

Declaration
public int Count { get; }
Property Value
Type
System.Int32

IsFixedSize

Gets a value indicating whether this instance is fixed size.

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

true if this instance is fixed size; otherwise, false.

IsInitializing

Gets a value indicating whether this instance is initializing.

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

true if this instance is initializing; otherwise, false.

IsReadOnly

Gets a value indicating whether the collection is read-only.

Declaration
public bool IsReadOnly { get; }
Property Value
Type
System.Boolean

IsSynchronized

Gets a value indicating whether this instance is synchronized.

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

true if this instance is synchronized; otherwise, false.

Item[Int32]

Gets or sets the TreeNode at the specified index.

Declaration
public TreeNode this[int index] { get; set; }
Parameters
Type Name Description
System.Int32 index
Property Value
Type
TreeNode

ParentNode

Gets the parent node.

Declaration
public TreeNode ParentNode { get; }
Property Value
Type Description
TreeNode

The parent node.

TreeModel

Gets the tree model.

Declaration
public TreeModel TreeModel { get; }
Property Value
Type Description
TreeModel

The tree model.

Methods

Add(TreeNode)

Adds a tree node.

Declaration
public void Add(TreeNode treeNode)
Parameters
Type Name Description
TreeNode treeNode

The tree node.

Clear()

Removes all items from the collection.

Declaration
public void Clear()

Contains(TreeNode)

Determines whether the tree node is a direct child node (not grand child) of this collection.

Declaration
public bool Contains(TreeNode value)
Parameters
Type Name Description
TreeNode value

The value.
Returns
Type Description
System.Boolean

true if it is a child node; otherwise, false.

CopyTo(TreeNode[], Int32)

Copies to another array.

Declaration
public void CopyTo(TreeNode[] array, int index)
Parameters
Type Name Description
TreeNode[] array

The array.
System.Int32 index

The index.

Dispose()

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

Declaration
public void Dispose()

GetNext(TreeNode)

Gets the next tree node.

Declaration
public TreeNode GetNext(TreeNode treeNode)
Parameters
Type Name Description
TreeNode treeNode

The tree node.
Returns
Type
TreeNode

GetPrevious(TreeNode)

Gets the previous tree node.

Declaration
public TreeNode GetPrevious(TreeNode treeNode)
Parameters
Type Name Description
TreeNode treeNode

The tree node.
Returns
Type
TreeNode

IndexOf(TreeNode)

Returns the index of the node in this collection.

Declaration
public int IndexOf(TreeNode value)
Parameters
Type Name Description
TreeNode value

The value.
Returns
Type
System.Int32

Insert(Int32, TreeNode)

Inserts the node at the specified index.

Declaration
public void Insert(int index, TreeNode treeNode)
Parameters
Type Name Description
System.Int32 index

The index.
TreeNode treeNode

The tree node.

InvalidateCounterBottomUp()

Marks all counters dirty in this object and parent nodes.

Declaration
public void InvalidateCounterBottomUp()

InvalidateCounterTopDown(Boolean)

Marks all counters dirty in this object and child nodes.

Declaration
public void InvalidateCounterTopDown(bool notifyCounterSource)
Parameters
Type Name Description
System.Boolean notifyCounterSource

if set to true notify counter source.

Remove(TreeNode)

Removes the specified tree node.

Declaration
public bool Remove(TreeNode treeNode)
Parameters
Type Name Description
TreeNode treeNode

The tree node.
Returns
Type
System.Boolean

RemoveAt(Int32)

Removes the child node at the specified index.

Declaration
public void RemoveAt(int index)
Parameters
Type Name Description
System.Int32 index

The zero-based index of the item to remove.
Exceptions
Type Condition
System.ArgumentOutOfRangeException

index is not a valid index in the collection.

Explicit Interface Implementations

ITreeTableCounterSource.GetCounter()

Declaration
ITreeTableCounter ITreeTableCounterSource.GetCounter()
Returns
Type
ITreeTableCounter

Implements

System.Collections.Generic.IList<>
System.Collections.Generic.ICollection<>
System.Collections.Generic.IEnumerable<T>
System.Collections.IEnumerable
System.IDisposable