Udostępnij za pośrednictwem

  • Artykuł

ReadOnlyObservableCollection<T> Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Represents a read-only ObservableCollection<T>.

Inheritance Hierarchy

System.Object
  System.Collections.ObjectModel.ReadOnlyCollection<T>
    System.Collections.ObjectModel.ReadOnlyObservableCollection<T>

Namespace:  System.Collections.ObjectModel
Assembly:  System.Windows (in System.Windows.dll)

Syntax

'Declaration
Public Class ReadOnlyObservableCollection(Of T) _
    Inherits ReadOnlyCollection(Of T) _
    Implements INotifyCollectionChanged, INotifyPropertyChanged

public class ReadOnlyObservableCollection<T> : ReadOnlyCollection<T>, 
    INotifyCollectionChanged, INotifyPropertyChanged

Type Parameters

  • T
    The type of objects that the collection holds.

The ReadOnlyObservableCollection<T> type exposes the following members.

Constructors

  Name Description
Public methodSupported by Silverlight for Windows Phone ReadOnlyObservableCollection<T> Initializes a new instance of the ReadOnlyObservableCollection<T> class that serves as a wrapper for the specified ObservableCollection<T>.

Top

Properties

  Name Description
Public propertySupported by Silverlight for Windows Phone Count Gets the number of elements contained in the ReadOnlyCollection<T> instance. (Inherited from ReadOnlyCollection<T>.)
Public propertySupported by Silverlight for Windows Phone Item Gets the element at the specified index. (Inherited from ReadOnlyCollection<T>.)
Protected propertySupported by Silverlight for Windows Phone Items Returns the IList<T> that the ReadOnlyCollection<T> wraps. (Inherited from ReadOnlyCollection<T>.)

Top

Methods

  Name Description
Public methodSupported by Silverlight for Windows Phone Contains Determines whether an element is in the ReadOnlyCollection<T>. (Inherited from ReadOnlyCollection<T>.)
Public methodSupported by Silverlight for Windows Phone CopyTo Copies the entire ReadOnlyCollection<T> to a compatible one-dimensional Array, starting at the specified index of the target array. (Inherited from ReadOnlyCollection<T>.)
Public methodSupported by Silverlight for Windows Phone Equals(Object) Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodSupported by Silverlight for Windows Phone Finalize Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone GetEnumerator Returns an enumerator that iterates through the ReadOnlyCollection<T>. (Inherited from ReadOnlyCollection<T>.)
Public methodSupported by Silverlight for Windows Phone GetHashCode Serves as a hash function for a particular type. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone GetType Gets the Type of the current instance. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone IndexOf Searches for the specified object and returns the zero-based index of the first occurrence within the entire ReadOnlyCollection<T>. (Inherited from ReadOnlyCollection<T>.)
Protected methodSupported by Silverlight for Windows Phone MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Protected methodSupported by Silverlight for Windows Phone OnCollectionChanged Raises the CollectionChanged event.
Protected methodSupported by Silverlight for Windows Phone OnPropertyChanged Raises the PropertyChanged event.
Public methodSupported by Silverlight for Windows Phone ToString Returns a string that represents the current object. (Inherited from Object.)

Top

Events

  Name Description
Protected eventSupported by Silverlight for Windows Phone CollectionChanged Occurs when an item is added or removed.
Protected eventSupported by Silverlight for Windows Phone PropertyChanged Occurs when a property value changes.

Top

Explicit Interface Implementations

  Name Description
Explicit interface implemetationPrivate methodSupported by Silverlight for Windows Phone ICollection<T>.Add Adds an item to the ICollection<T>. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate methodSupported by Silverlight for Windows Phone ICollection<T>.Clear Removes all items from the ICollection<T>. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate methodSupported by Silverlight for Windows Phone ICollection.CopyTo Copies the elements of the ICollection to an Array, starting at a particular Array index. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate propertySupported by Silverlight for Windows Phone ICollection<T>.IsReadOnly Gets a value indicating whether the ICollection<T> is read-only. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate propertySupported by Silverlight for Windows Phone ICollection.IsSynchronized Gets a value indicating whether access to the ICollection is synchronized (thread safe). (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate methodSupported by Silverlight for Windows Phone ICollection<T>.Remove Removes the first occurrence of a specific object from the ICollection<T>. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate propertySupported by Silverlight for Windows Phone ICollection.SyncRoot Gets an object that can be used to synchronize access to the ICollection. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate methodSupported by Silverlight for Windows Phone IEnumerable.GetEnumerator Returns an enumerator that iterates through a collection. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate methodSupported by Silverlight for Windows Phone IList.Add Adds an item to the IList. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate methodSupported by Silverlight for Windows Phone IList.Clear Removes all items from the IList. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate methodSupported by Silverlight for Windows Phone IList.Contains Determines whether the IList contains a specific value. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate methodSupported by Silverlight for Windows Phone IList.IndexOf Determines the index of a specific item in the IList. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate methodSupported by Silverlight for Windows Phone IList<T>.Insert Inserts an item to the IList<T> at the specified index. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate methodSupported by Silverlight for Windows Phone IList.Insert Inserts an item to the IList at the specified index. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate propertySupported by Silverlight for Windows Phone IList.IsFixedSize Gets a value indicating whether the IList has a fixed size. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate propertySupported by Silverlight for Windows Phone IList.IsReadOnly Gets a value indicating whether the IList is read-only. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate propertySupported by Silverlight for Windows Phone IList<T>.Item Gets or sets the element at the specified index. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate propertySupported by Silverlight for Windows Phone IList.Item Gets or sets the element at the specified index. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate methodSupported by Silverlight for Windows Phone IList.Remove Removes the first occurrence of a specific object from the IList. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate methodSupported by Silverlight for Windows Phone IList<T>.RemoveAt Removes the IList<T> item at the specified index. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate methodSupported by Silverlight for Windows Phone IList.RemoveAt Removes the IList item at the specified index. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection<T>.)
Explicit interface implemetationPrivate event INotifyCollectionChanged.CollectionChanged For a description of this member, see INotifyCollectionChanged.CollectionChanged.
Explicit interface implemetationPrivate event INotifyPropertyChanged.PropertyChanged For a description of this member, see INotifyPropertyChanged.PropertyChanged.

Top

Remarks

This class is a read-only wrapper for an ObservableCollection<T>.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.