TreeNodeItemCollection Class

public class TreeNodeItemCollection : ISelectedTreeItemCollection

public TreeNodeItemCollection(bool useHashSet)

Parameter	Type	Description
useHashSet	bool	Whether to use a hash set to handle ActiproSoftware.Windows.Controls.Grids.Primitives.TreeNodeItemCollection.Contains(ActiproSoftware.Windows.Controls.Grids.Primitives.TreeNode) checks faster. Only use for selection collections.

public bool CanFilter { get; }

Property Value

bool:

true if this view support filtering; otherwise, false.

public bool CanGroup { get; }

Property Value

bool:

true if this view supports grouping; otherwise, false.

public bool CanSort { get; }

Property Value

bool:

true if this view supports sorting; otherwise, false.

public int Count { get; }

Property Value

int:

The number of elements contained in the ICollection<T>.

public CultureInfo Culture { get; set; }

Property Value

CultureInfo:

The culture to use during sorting.

public object? CurrentItem { get; }

Property Value

object:

The current item of the view or null if there is no current item.

public int CurrentPosition { get; }

Property Value

int:

The ordinal position of the System.ComponentModel.ICollectionView.CurrentItem within the view.

public Predicate<object>? Filter { get; set; }

Property Value

Predicate<object>:

A method used to determine if an item is suitable for inclusion in the view.

public ObservableCollection<GroupDescription> GroupDescriptions { get; }

Property Value

ObservableCollection<GroupDescription>:

A collection of System.ComponentModel.GroupDescription objects that describe how the items in the collection are grouped in the view.

public ReadOnlyObservableCollection<object>? Groups { get; }

Property Value

ReadOnlyObservableCollection<object>:

A read-only collection of the top-level groups or null if there are no groups.

public bool IsCurrentAfterLast { get; }

Property Value

bool:

true if the System.ComponentModel.ICollectionView.CurrentItem of the view is beyond the end of the collection; otherwise, false.

public bool IsCurrentBeforeFirst { get; }

Property Value

bool:

true if the System.ComponentModel.ICollectionView.CurrentItem of the view is beyond the beginning of the collection; otherwise, false.

public bool IsEmpty { get; }

Property Value

bool:

true if the resulting view is empty; otherwise, false.

public bool IsReadOnly { get; }

Property Value

bool:

true if the ICollection<T> is read-only; otherwise, false.

public object this[int index] { get; }

Parameter	Type	Description
index	int	The index of the item to return.

Property Value

object

public SortDescriptionCollection SortDescriptions { get; }

Property Value

SortDescriptionCollection:

A collection of System.ComponentModel.SortDescription objects that describe how the items in the collection are sorted in the view.

public IEnumerable SourceCollection { get; }

Property Value

IEnumerable:

An IEnumerable object that is the underlying collection.

public bool Contains(object item)

Parameter	Type	Description
item	object	The object to locate in the ICollection<T>.

Returns

bool:

true if item is found in the ICollection<T>; otherwise, false.

public void CopyTo(object[] array, int arrayIndex)

Parameter	Type	Description
array	object[]	The one-dimensional Array that is the destination of the elements copied from List<T>. The Array must have zero-based indexing.
arrayIndex	int	The zero-based index in array at which copying begins.

Exceptions

Type	Condition
ArgumentNullException	array is null.
ArgumentOutOfRangeException	arrayIndex is less than 0.
ArgumentException	The number of elements in the source List<T> is greater than the available space from arrayIndex to the end of the destination array.

public IDisposable DeferRefresh()

Returns

IDisposable:

An IDisposable object that you can use to dispose of the calling object.

public IEnumerator<object> GetEnumerator()

Returns

IEnumerator<object>:

An IEnumerator object that can be used to iterate through the collection.

public int IndexOf(object item)

Parameter	Type	Description
item	object	The object to locate in the IList<T>.

Returns

int:

The index of item if found in the list; otherwise, -1.

public bool MoveCurrentTo(object? item)

Parameter	Type	Description
item	object	The item to set as the System.ComponentModel.ICollectionView.CurrentItem.

Returns

bool:

true if the resulting System.ComponentModel.ICollectionView.CurrentItem is within the view; otherwise, false.

public bool MoveCurrentToFirst()

Returns

bool:

true if the resulting System.ComponentModel.ICollectionView.CurrentItem is within the view; otherwise, false.

public bool MoveCurrentToLast()

Returns

bool:

true if the resulting System.ComponentModel.ICollectionView.CurrentItem is an item within the view; otherwise, false.

public bool MoveCurrentToNext()

Returns

bool:

true if the resulting System.ComponentModel.ICollectionView.CurrentItem is an item within the view; otherwise, false.

public bool MoveCurrentToPosition(int position)

Parameter	Type	Description
position	int	The index to set the System.ComponentModel.ICollectionView.CurrentItem to.

Returns

bool:

true if the resulting System.ComponentModel.ICollectionView.CurrentItem is an item within the view; otherwise, false.

public bool MoveCurrentToPrevious()

Returns

bool:

true if the resulting System.ComponentModel.ICollectionView.CurrentItem is an item within the view; otherwise, false.

public void Refresh()

public event NotifyCollectionChangedEventHandler? CollectionChanged

Event Type

NotifyCollectionChangedEventHandler

public event EventHandler? CurrentChanged

Event Type

EventHandler

public event CurrentChangingEventHandler? CurrentChanging

Event Type

CurrentChangingEventHandler