Class DependencyObjectCollection<T>

Represents a collection of DependencyObject instances of a specified type.

Inheritance

System.Object

DependencyObject

DependencyObjectCollection<T>

ConditionCollection

AttachableCollection<T>

Implements

System.Collections.Generic.IList<T>

System.Collections.Generic.ICollection<T>

System.Collections.Generic.IEnumerable<T>

System.Collections.IList

System.Collections.ICollection

System.Collections.IEnumerable

System.Collections.Specialized.INotifyCollectionChanged

Inherited Members

DependencyObject.GetValue(DependencyProperty)

DependencyObject.SetCurrentValue(DependencyProperty, Object)

DependencyObject.ReadLocalValue(DependencyProperty)

DependencyObject.SetValue(DependencyProperty, Object)

DependencyObject.SetValue(DependencyPropertyKey, Object)

DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs)

DependencyObject.CoerceValue(DependencyProperty)

DependencyObject.Dispatcher

DependencyObject.INTERNAL_OnAttachedToVisualTree()

DependencyObject.INTERNAL_OnDetachedFromVisualTree()

DependencyObject.ClearValue(DependencyProperty)

DependencyObject.ClearValue(DependencyPropertyKey)

DependencyObject.CheckAccess()

DependencyObject.GetAnimationBaseValue(DependencyProperty)

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.ToString()

Namespace: System.Windows

Assembly: OpenSilver.dll

Syntax

public class DependencyObjectCollection<T> : DependencyObject, IDependencyObject, IList<T>, ICollection<T>, IEnumerable<T>, IList, ICollection, IEnumerable, INotifyCollectionChanged

Type Parameters

Name	Description
T	The type of items in the collection.

Constructors

DependencyObjectCollection()

Initializes a new instance of the DependencyObjectCollection<T> class.

Declaration

public DependencyObjectCollection()

Properties

Count

Gets the number of objects in the collection.

Declaration

public int Count { get; }

Property Value

Type	Description
System.Int32

IsReadOnly

Gets a value that indicates whether the collection can be modified.

Declaration

public bool IsReadOnly { get; }

Property Value

Type	Description
System.Boolean

Item[Int32]

Gets or sets the object at the specified index.

Declaration

public T this[int index] { get; set; }

Parameters

Type	Name	Description
System.Int32	index	The index of the object to get or set.

Property Value

Type	Description
T	The object at the specified index.

Exceptions

Type	Condition
System.ArgumentOutOfRangeException	index is less than zero or greater than the number of items in the collection.
System.ArgumentException	The specified value when setting this property is not a DependencyObject.
System.InvalidOperationException	The property is being set in a CollectionChanged event handler.

Methods

Add(T)

Adds the specified object to the end of the collection.

Declaration

public void Add(T item)

Parameters

Type	Name	Description
T	item	The object to add to the collection.

Exceptions

Type	Condition
System.ArgumentNullException	item is not a DependencyObject.
System.InvalidOperationException	The method is being called in a CollectionChanged event handler.

Clear()

Removes all objects from the collection.

Declaration

public void Clear()

Exceptions

Type	Condition
System.InvalidOperationException	The method is being called in a CollectionChanged event handler.

Contains(T)

Gets a value that indicates whether the specified object is in the collection.

Declaration

public bool Contains(T item)

Parameters

Type	Name	Description
T	item	The object to check for in the collection.

Returns

Type	Description
System.Boolean	true if the object is in the collection; otherwise, false.

Exceptions

Type	Condition
System.ArgumentException	item is not a DependencyObject.

CopyTo(T[], Int32)

Copies the objects in the collection to the specified array, starting at the specified index.

Declaration

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

Parameters

Type	Name	Description
T[]	array	The destination array.
System.Int32	arrayIndex	The index of the first object to copy.

GetEnumerator()

Gets an enumerator that iterates through the collection.

Declaration

public IEnumerator<T> GetEnumerator()

Returns

Type	Description
System.Collections.Generic.IEnumerator<T>	An enumerator for the collection.

IndexOf(T)

Gets the index of the specified object within the collection, or -1 if the object is not in the collection.

Declaration

public int IndexOf(T item)

Parameters

Type	Name	Description
T	item	The object to locate in the collection.

Returns

Type	Description
System.Int32	The index of the first occurrence of item within the collection, or -1 if item is not in the collection.

Exceptions

Type	Condition
System.ArgumentException	item is not a DependencyObject.

Insert(Int32, T)

Adds the specified object to the collection at the specified index.

Declaration

public void Insert(int index, T item)

Parameters

Type	Name	Description
System.Int32	index	The index at which to add the object.
T	item	The object to add.

Exceptions

Type	Condition
System.ArgumentOutOfRangeException	index is less than zero or greater than the number of items in the collection.
System.ArgumentException	item is not a DependencyObject.
System.InvalidOperationException	The method is being called in a CollectionChanged event handler.

Remove(T)

Removes the specified object from the collection.

Declaration

public bool Remove(T item)

Parameters

Type	Name	Description
T	item	The object to remove.

Returns

Type	Description
System.Boolean	true if the object was removed; false if the object was not found in the collection.

Exceptions

Type	Condition
System.ArgumentException	item is not a DependencyObject.
System.InvalidOperationException	The method is being called in a CollectionChanged event handler.

RemoveAt(Int32)

Removes the object at the specified index from the collection.

Declaration

public void RemoveAt(int index)

Parameters

Type	Name	Description
System.Int32	index	The index of the object to remove.

Exceptions

Type	Condition
System.ArgumentOutOfRangeException	index is less than zero or greater than the highest index in the collection.
System.InvalidOperationException	The method is being called in a CollectionChanged event handler.

Events

CollectionChanged

Occurs when items in the collection are added, removed, or replaced.

Declaration

public event NotifyCollectionChangedEventHandler CollectionChanged

Event Type

Type	Description
System.Collections.Specialized.NotifyCollectionChangedEventHandler

Explicit Interface Implementations

ICollection.CopyTo(Array, Int32)

Declaration

void ICollection.CopyTo(Array array, int arrayIndex)

Parameters

Type	Name	Description
System.Array	array
System.Int32	arrayIndex

ICollection.IsSynchronized

Declaration

bool ICollection.IsSynchronized { get; }

Returns

Type	Description
System.Boolean

ICollection.SyncRoot

Declaration

object ICollection.SyncRoot { get; }

Returns

Type	Description
System.Object

IEnumerable.GetEnumerator()

Declaration

IEnumerator IEnumerable.GetEnumerator()

Returns

Type	Description
System.Collections.IEnumerator

IList.Add(Object)

Declaration

int IList.Add(object item)

Parameters

Type	Name	Description
System.Object	item

Returns

Type	Description
System.Int32

IList.Contains(Object)

Declaration

bool IList.Contains(object item)

Parameters

Type	Name	Description
System.Object	item

Returns

Type	Description
System.Boolean

IList.IndexOf(Object)

Declaration

int IList.IndexOf(object value)

Parameters

Type	Name	Description
System.Object	value

Returns

Type	Description
System.Int32

IList.Insert(Int32, Object)

Declaration

void IList.Insert(int index, object value)

Parameters

Type	Name	Description
System.Int32	index
System.Object	value

IList.IsFixedSize

Declaration

bool IList.IsFixedSize { get; }

Returns

Type	Description
System.Boolean

IList.Item[Int32]

Declaration

object IList.this[int index] { get; set; }

Parameters

Type	Name	Description
System.Int32	index

Returns

Type	Description
System.Object

IList.Remove(Object)

Declaration

void IList.Remove(object value)

Parameters

Type	Name	Description
System.Object	value

Implements

System.Collections.Generic.IList<T>

System.Collections.Generic.ICollection<T>

System.Collections.Generic.IEnumerable<T>

System.Collections.IList

System.Collections.ICollection

System.Collections.IEnumerable

System.Collections.Specialized.INotifyCollectionChanged

Extension Methods

DependencyObjectHelper.GetSelfAndAncestors(DependencyObject)

VisualTreeExtensions.GetVisualAncestors(DependencyObject)

VisualTreeExtensions.GetVisualAncestorsAndSelf(DependencyObject)

VisualTreeExtensions.GetVisualChildren(DependencyObject)

VisualTreeExtensions.GetVisualChildrenAndSelf(DependencyObject)

VisualTreeExtensions.GetVisualDescendants(DependencyObject)

VisualTreeExtensions.GetVisualDescendantsAndSelf(DependencyObject)

VisualTreeExtensions.GetVisualSiblings(DependencyObject)

VisualTreeExtensions.GetVisualSiblingsAndSelf(DependencyObject)