Class ObservableCollection<T>

Represent a collection of items that fire events when it is modified.

Inheritance

System.Object

ObservableCollection<T>

Implements

System.Collections.Generic.IList<T>

System.Collections.Generic.ICollection<T>

System.Collections.Generic.IEnumerable<T>

System.Collections.IEnumerable

Inherited Members

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: netDxf.Collections

Assembly: CADability.dll

Syntax

public class ObservableCollection<T> : IList<T>, ICollection<T>, IEnumerable<T>, IEnumerable

Type Parameters

Name	Description
T	Type of items.

Constructors

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ObservableCollection()

Initializes a new instance of ObservableCollection.

Declaration

public ObservableCollection()

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ObservableCollection(Int32)

Initializes a new instance of ObservableCollection and has the specified initial capacity.

Declaration

public ObservableCollection(int capacity)

Parameters

Type	Name	Description
System.Int32	capacity	The number of items the collection can initially store.

Properties

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Count

Gets the number of object contained in the collection.

Declaration

public int Count { get; }

Property Value

Type	Description
System.Int32

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IsReadOnly

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

Declaration

public virtual bool IsReadOnly { get; }

Property Value

Type	Description
System.Boolean

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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 zero-based index of the element to get or set.

Property Value

Type	Description
T	The object at the specified index.

Methods

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Add(T)

Adds an object to the collection.

Declaration

public void Add(T item)

Parameters

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

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AddRange(IEnumerable<T>)

Adds an object list to the end of the collection.

Declaration

public void AddRange(IEnumerable<T> collection)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T>	collection	The collection whose elements should be added.

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Clear()

Removes all object from the collection.

Declaration

public void Clear()

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Contains(T)

Determines whether an object is in the collection.

Declaration

public bool Contains(T item)

Parameters

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

Returns

Type	Description
System.Boolean	True if item is found in the collection; otherwise, false.

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CopyTo(T[], Int32)

Copies the entire collection to a compatible one-dimensional array, starting at the specified index of the target array.

Declaration

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

Parameters

Type	Name	Description
T[]	array	The one-dimensional System.Array that is the destination of the elements copied from the collection. The System.Array must have zero-based indexing.
System.Int32	arrayIndex	The zero-based index in array at which copying begins.

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GetEnumerator()

Returns an enumerator that iterates through the collection.

Declaration

public IEnumerator<T> GetEnumerator()

Returns

Type	Description
System.Collections.Generic.IEnumerator<T>	An enumerator that can be used to iterate through the collection.

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IndexOf(T)

Searches for the specified object and returns the zero-based index of the first occurrence within the entire 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 zero-based index of the first occurrence of item within the entire collection, if found; otherwise, –1.

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Insert(Int32, T)

Inserts an object into the collection at the specified index.

Declaration

public void Insert(int index, T item)

Parameters

Type	Name	Description
System.Int32	index	The zero-based index at which item should be inserted.
T	item	The object to insert. The value can not be null.

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OnAddItemEvent(T)

Declaration

protected virtual void OnAddItemEvent(T item)

Parameters

Type	Name	Description
T	item

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OnBeforeAddItemEvent(T)

Declaration

protected virtual bool OnBeforeAddItemEvent(T item)

Parameters

Type	Name	Description
T	item

Returns

Type	Description
System.Boolean

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OnBeforeRemoveItemEvent(T)

Declaration

protected virtual bool OnBeforeRemoveItemEvent(T item)

Parameters

Type	Name	Description
T	item

Returns

Type	Description
System.Boolean

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OnRemoveItemEvent(T)

Declaration

protected virtual void OnRemoveItemEvent(T item)

Parameters

Type	Name	Description
T	item

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Remove(T)

Removes the first occurrence of a specific object from the collection

Declaration

public bool Remove(T item)

Parameters

Type	Name	Description
T	item	The object to remove from the collection.

Returns

Type	Description
System.Boolean	True if object is successfully removed; otherwise, false.

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Remove(IEnumerable<T>)

Removes the first occurrence of a specific object from the collection

Declaration

public void Remove(IEnumerable<T> items)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T>	items	The list of objects to remove from the collection.

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RemoveAt(Int32)

Removes the object at the specified index of the collection.

Declaration

public void RemoveAt(int index)

Parameters

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

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Reverse()

Reverses the order of the elements in the entire list.

Declaration

public void Reverse()

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Sort()

Sorts the elements in the entire System.Collections.Generic.List<T> using the default comparer.

Declaration

public void Sort()

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Sort(IComparer<T>)

Sorts the elements in a range of elements in System.Collections.Generic.List<T> using the specified comparer.

Declaration

public void Sort(IComparer<T> comparer)

Parameters

Type	Name	Description
System.Collections.Generic.IComparer<T>	comparer	The System.Collections.Generic.IComparer<T> implementation to use when comparing elements, or null to use the default comparer System.Collections.Generic.Comparer<T>.Default.

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Sort(Comparison<T>)

Sorts the elements in the entire System.Collections.Generic.List<T> using the specified System.Comparison<T>.

Declaration

public void Sort(Comparison<T> comparision)

Parameters

Type	Name	Description
System.Comparison<T>	comparision	The System.Comparison<T> to use when comparing elements.

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Sort(Int32, Int32, IComparer<T>)

Sorts the elements in a range of elements in System.Collections.Generic.List<T> using the specified comparer.

Declaration

public void Sort(int index, int count, IComparer<T> comparer)

Parameters

Type	Name	Description
System.Int32	index	The zero-based starting index of the range to sort.
System.Int32	count	The length of the range to sort.
System.Collections.Generic.IComparer<T>	comparer	The System.Collections.Generic.IComparer<T> implementation to use when comparing elements, or null to use the default comparer System.Collections.Generic.Comparer<T>.Default.

Events

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AddItem

Declaration

public event ObservableCollection<T>.AddItemEventHandler AddItem

Event Type

Type	Description
ObservableCollection.AddItemEventHandler<>

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BeforeAddItem

Declaration

public event ObservableCollection<T>.BeforeAddItemEventHandler BeforeAddItem

Event Type

Type	Description
ObservableCollection.BeforeAddItemEventHandler<>

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BeforeRemoveItem

Declaration

public event ObservableCollection<T>.BeforeRemoveItemEventHandler BeforeRemoveItem

Event Type

Type	Description
ObservableCollection.BeforeRemoveItemEventHandler<>

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RemoveItem

Declaration

public event ObservableCollection<T>.RemoveItemEventHandler RemoveItem

Event Type

Type	Description
ObservableCollection.RemoveItemEventHandler<>

Explicit Interface Implementations

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ICollection<T>.Add(T)

Declaration

void ICollection<T>.Add(T item)

Parameters

Type	Name	Description
T	item

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IList<T>.Insert(Int32, T)

Declaration

void IList<T>.Insert(int index, T item)

Parameters

Type	Name	Description
System.Int32	index
T	item

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IEnumerable.GetEnumerator()

Declaration

IEnumerator IEnumerable.GetEnumerator()

Returns

Type	Description
System.Collections.IEnumerator

Implements

System.Collections.Generic.IList<T>

System.Collections.Generic.ICollection<T>

System.Collections.Generic.IEnumerable<T>

System.Collections.IEnumerable