IComponent Schnittstelle

Definition

Namespace:

System.ComponentModel

Assembly:

System.dll

Stellt Funktionen bereit, die für alle Komponenten erforderlich sind.

public interface class IComponent : IDisposable

[System.ComponentModel.TypeConverter(typeof(System.ComponentModel.ComponentConverter))]
[System.Runtime.InteropServices.ComVisible(true)]
public interface IComponent : IDisposable

[<System.ComponentModel.TypeConverter(typeof(System.ComponentModel.ComponentConverter))>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type IComponent = interface
    interface IDisposable

Public Interface IComponent
Implements IDisposable

Abgeleitet

System.ComponentModel.Component

System.ComponentModel.MarshalByValueComponent

System.Web.HttpApplication

System.Web.UI.Control

System.Windows.Forms.Control

System.Windows.Forms.DataGridViewColumn

System.Windows.Forms.IBindableComponent

System.Windows.Forms.ScrollableControl

System.Windows.Forms.ToolStrip

System.Windows.Forms.ToolStripItem

System.Windows.Forms.ToolStripOverflow

System.Windows.Forms.ToolStripPanel

System.Windows.Forms.ToolStripPanelRow

System.Workflow.ComponentModel.DependencyObject

Attribute

TypeConverterAttribute ComVisibleAttribute

Implementiert

IDisposable

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie die IComponentSchnittstellen ISiteimplementiert werden IContainer .

/// <summary>
/// The following example demonstrates the implementation of
/// ISite, IComponent, and IContainer for use in a simple library container.
///
/// This example uses the System, System.ComponentModel, and System.Collections
/// namespaces.
/// </summary>
//This code segment implements the ISite and IComponent interfaces.
//The implementation of the IContainer interface can be seen in the documentation
//of IContainer.

//Implement the ISite interface.

// The ISBNSite class represents the ISBN name of the book component
class ISBNSite : ISite
{
    readonly IComponent m_curComponent;
    readonly IContainer m_curContainer;
    readonly bool m_bDesignMode;
    string m_ISBNCmpName;

    public ISBNSite(IContainer actvCntr, IComponent prntCmpnt)
    {
        m_curComponent = prntCmpnt;
        m_curContainer = actvCntr;
        m_bDesignMode = false;
        m_ISBNCmpName = null;
    }

    //Support the ISite interface.
    public virtual IComponent Component => m_curComponent;

    public virtual IContainer Container => m_curContainer;

    public virtual bool DesignMode => m_bDesignMode;

    public virtual string Name
    {
        get => m_ISBNCmpName;

        set => m_ISBNCmpName = value;
    }

    //Support the IServiceProvider interface.
    public virtual object GetService(Type serviceType) =>
        //This example does not use any service object.
        null;
}

// The BookComponent class represents the book component of the library container.

// This class implements the IComponent interface.

class BookComponent : IComponent
{
    public event EventHandler Disposed;
    ISite m_curISBNSite;

    public BookComponent(string Title, string Author)
    {
        m_curISBNSite = null;
        Disposed = null;
        this.Title = Title;
        this.Author = Author;
    }

    public string Title { get; }

    public string Author { get; }

    public virtual void Dispose() =>
        //There is nothing to clean.
        Disposed?.Invoke(this, EventArgs.Empty);

    public virtual ISite Site
    {
        get => m_curISBNSite;
        set => m_curISBNSite = value;
    }

    public override bool Equals(object cmp)
    {
        BookComponent cmpObj = (BookComponent)cmp;
        return Title.Equals(cmpObj.Title) && Author.Equals(cmpObj.Author);
    }

    public override int GetHashCode() => base.GetHashCode();
}

    'The following example demonstrates the implementation of 
    'ISite, IComponent, and IContainer for use in a simple library container.
    '
    'This example imports the System, System.ComponentModel, and System.Collections
    'namespaces.

    'This code segment implements the ISite and IComponent interfaces.
    'The implementation of the IContainer interface can be seen in the documentation 
    'of IContainer.

    'Implement the ISite interface.

    'The ISBNSite class represents the ISBN name of the book component
    
Class ISBNSite
    Implements ISite
    Private m_curComponent As IComponent
    Private m_curContainer As IContainer
    Private m_bDesignMode As Boolean
    Private m_ISBNCmpName As String

    Public Sub New(ByVal actvCntr As IContainer, ByVal prntCmpnt As IComponent)
        m_curComponent = prntCmpnt
        m_curContainer = actvCntr
        m_bDesignMode = False
        m_ISBNCmpName = Nothing
    End Sub

    'Support the ISite interface.
    Public ReadOnly Property Component() As IComponent Implements ISite.Component
        Get
            Return m_curComponent
        End Get
    End Property

    Public ReadOnly Property Container() As IContainer Implements ISite.Container
        Get
            Return m_curContainer
        End Get
    End Property

    Public ReadOnly Property DesignMode() As Boolean Implements ISite.DesignMode
        Get
            Return m_bDesignMode
        End Get
    End Property

    Public Property Name() As String Implements ISite.Name
        Get
            Return m_ISBNCmpName
        End Get
        Set(ByVal Value As String)
            m_ISBNCmpName = Value
        End Set
    End Property

    'Support the IServiceProvider interface.
    Public Function GetService(ByVal serviceType As Type) As Object Implements IServiceProvider.GetService
        'This example does not use any service object.
        GetService = Nothing
    End Function
End Class

'The BookComponent class represents the book component of the library container.
Class BookComponent
    Implements IComponent
    Public Event Disposed As EventHandler Implements IComponent.Disposed
    Private m_curISBNSite As ISite
    Private m_bookTitle As String
    Private m_bookAuthor As String

    Public Sub New(ByVal Title As String, ByVal Author As String)
        m_curISBNSite = Nothing
        m_bookTitle = Title
        m_bookAuthor = Author
    End Sub

    Public ReadOnly Property Title() As String
        Get
            Return m_bookTitle
        End Get
    End Property

    Public ReadOnly Property Author() As String
        Get
            Return m_bookAuthor
        End Get
    End Property

    Public Sub Dispose() Implements IDisposable.Dispose
        'There is nothing to clean.
        RaiseEvent Disposed(Me, EventArgs.Empty)
    End Sub

    Public Property Site() As ISite Implements IComponent.Site
        Get
            Return m_curISBNSite
        End Get
        Set(ByVal Value As ISite)
            m_curISBNSite = Value
        End Set
    End Property

    Public Overloads Function Equals(ByVal cmp As Object) As Boolean
        Dim cmpObj As BookComponent = CType(cmp, BookComponent)
        If (Me.Title.Equals(cmpObj.Title) And Me.Author.Equals(cmpObj.Author)) Then
            Equals = True
        Else
            Equals = False
        End If
    End Function

    Public Overrides Function GetHashCode() As Integer
        GetHashCode = MyBase.GetHashCode()
    End Function

End Class

Hinweise

Component ist die Standardimplementierung von IComponent und dient als Basisklasse für alle Komponenten in der Common Language Runtime.

Sie können Komponenten in einem Container enthalten. In diesem Kontext bezieht sich ein Eindämmung auf logische Eindämmung, nicht auf visuelle Eindämmung. Sie können Komponenten und Container in einer Vielzahl von Szenarien verwenden, sowohl visuell als auch nicht visuell.

System.Windows.Forms.Control erbt von Component, der Standardimplementierung von IComponent.

Eine Komponente interagiert in erster Linie über einen container bereitgestellten ISiteContainer, der ein Repository von containerspezifischen Informationen pro Komponente ist.

Hinweise für Ausführende

Um eine Komponente zu sein, muss eine Klasse die IComponent Schnittstelle implementieren und einen einfachen Konstruktor bereitstellen, der keine Parameter oder einen einzelnen Parameter vom Typ IContainererfordert.

Eigenschaften

Name	Beschreibung
Site	Dient zum Abrufen oder Festlegen des ISite zugeordneten mit der IComponent.

Methoden

Name	Beschreibung
Dispose()	Führt anwendungsdefinierte Aufgaben aus, die mit dem Freigeben, Freigeben oder Zurücksetzen nicht verwalteter Ressourcen verknüpft sind. (Geerbt von IDisposable)

Ereignisse

Name	Beschreibung
Disposed	Stellt die Methode dar, die das Disposed Ereignis einer Komponente behandelt.

Weitere Informationen

• Container
• IContainer
• ISite
• Control