VisualCollection Класс

Определение

Represents an ordered collection of Visual objects.Represents an ordered collection of Visual objects.

public ref class VisualCollection sealed : System::Collections::ICollection
public sealed class VisualCollection : System.Collections.ICollection
type VisualCollection = class
    interface ICollection
    interface IEnumerable
Public NotInheritable Class VisualCollection
Implements ICollection
Наследование
VisualCollection
Реализации

Примеры

В следующем примере показано, как создать VisualCollection и добавить в него элементы.The following example shows how to create a VisualCollection and add members to it.

// Create a host visual derived from the FrameworkElement class.
// This class provides layout, event handling, and container support for
// the child visual objects.
public class MyVisualHost : FrameworkElement
{
    // Create a collection of child visual objects.
    private VisualCollection _children;

    public MyVisualHost()
    {
        _children = new VisualCollection(this);
        _children.Add(CreateDrawingVisualRectangle());
        _children.Add(CreateDrawingVisualText());
        _children.Add(CreateDrawingVisualEllipses());

        // Add the event handler for MouseLeftButtonUp.
        this.MouseLeftButtonUp += new System.Windows.Input.MouseButtonEventHandler(MyVisualHost_MouseLeftButtonUp);
    }
' Create a host visual derived from the FrameworkElement class.
' This class provides layout, event handling, and container support for
' the child visual objects.
Public Class MyVisualHost
    Inherits FrameworkElement
    ' Create a collection of child visual objects.
    Private _children As VisualCollection

    Public Sub New()
        _children = New VisualCollection(Me)
        _children.Add(CreateDrawingVisualRectangle())
        _children.Add(CreateDrawingVisualText())
        _children.Add(CreateDrawingVisualEllipses())

        ' Add the event handler for MouseLeftButtonUp.
        AddHandler MouseLeftButtonUp, AddressOf MyVisualHost_MouseLeftButtonUp
    End Sub

Примечание

Полный пример см. в разделе Проверка попадания с помощью примера DrawingVisuals.For the complete sample, see Hit Test Using DrawingVisuals Sample.

Комментарии

VisualCollection имеет неявное сходство контекстов.A VisualCollection has implied context affinity. Если процедура пытается получить доступ к VisualCollection из контекста, отличного от контекстного ContainerVisual, создается исключение.If a procedure attempts to access the VisualCollection from a different context than the context of the owning ContainerVisual, an exception is thrown.

Конструкторы

VisualCollection(Visual)

Initializes a new instance of the VisualCollection class.Initializes a new instance of the VisualCollection class.

Свойства

Capacity

Gets or sets the number of elements that the VisualCollection can contain.Gets or sets the number of elements that the VisualCollection can contain.

Count

Gets the number of elements in the collection.Gets the number of elements in the collection.

IsReadOnly

Gets a value that indicates whether the VisualCollection is read-only.Gets a value that indicates whether the VisualCollection is read-only.

IsSynchronized

Gets a value that indicates whether access to the VisualCollection is synchronized (thread-safe).Gets a value that indicates whether access to the VisualCollection is synchronized (thread-safe).

Item[Int32]

Gets or sets the Visual that is stored at the zero-based index of the VisualCollection.Gets or sets the Visual that is stored at the zero-based index of the VisualCollection.

SyncRoot

Gets an object that can be used to synchronize access to the VisualCollection.Gets an object that can be used to synchronize access to the VisualCollection.

Методы

Add(Visual)

Appends a Visual to the end of the VisualCollection.Appends a Visual to the end of the VisualCollection.

Clear()

Removes all elements from the VisualCollection.Removes all elements from the VisualCollection.

Contains(Visual)

Returns a Boolean value that indicates whether the specified Visual is contained in the collection.Returns a Boolean value that indicates whether the specified Visual is contained in the collection.

CopyTo(Array, Int32)

Copies the items in the collection to an array, starting at a specific array index.Copies the items in the collection to an array, starting at a specific array index.

CopyTo(Visual[], Int32)

Copies the current collection into the passed Visual array.Copies the current collection into the passed Visual array.

Equals(Object)

Определяет, равен ли заданный объект текущему объекту.Determines whether the specified object is equal to the current object.

(Унаследовано от Object)
GetEnumerator()

Retrieves an enumerator that can iterate through the VisualCollection.Retrieves an enumerator that can iterate through the VisualCollection.

GetHashCode()

Служит хэш-функцией по умолчанию.Serves as the default hash function.

(Унаследовано от Object)
GetType()

Возвращает объект Type для текущего экземпляра.Gets the Type of the current instance.

(Унаследовано от Object)
IndexOf(Visual)

Returns the zero-based index of the Visual.Returns the zero-based index of the Visual.

Insert(Int32, Visual)

Inserts an element into the VisualCollection at the specified index.Inserts an element into the VisualCollection at the specified index.

MemberwiseClone()

Создает неполную копию текущего объекта Object.Creates a shallow copy of the current Object.

(Унаследовано от Object)
Remove(Visual)

Removes the specified Visual object from the VisualCollection.Removes the specified Visual object from the VisualCollection.

RemoveAt(Int32)

Removes the visual object at the specified index in the VisualCollection.Removes the visual object at the specified index in the VisualCollection.

RemoveRange(Int32, Int32)

Removes a range of visual objects from the VisualCollection.Removes a range of visual objects from the VisualCollection.

ToString()

Возвращает строку, представляющую текущий объект.Returns a string that represents the current object.

(Унаследовано от Object)

Явные реализации интерфейса

IEnumerable.GetEnumerator()

This member supports the WPFWPF infrastructure and is not intended to be used directly from your code.This member supports the WPFWPF infrastructure and is not intended to be used directly from your code. For a description of this member, see GetEnumerator().For a description of this member, see GetEnumerator().

Методы расширения

Cast<TResult>(IEnumerable)

Приводит элементы объекта IEnumerable к заданному типу.Casts the elements of an IEnumerable to the specified type.

OfType<TResult>(IEnumerable)

Выполняет фильтрацию элементов объекта IEnumerable по заданному типу.Filters the elements of an IEnumerable based on a specified type.

AsParallel(IEnumerable)

Позволяет осуществлять параллельный запрос.Enables parallelization of a query.

AsQueryable(IEnumerable)

Преобразовывает коллекцию IEnumerable в объект IQueryable.Converts an IEnumerable to an IQueryable.

Применяется к