IComponent 介面

定義

提供所有元件必須的功能。Provides functionality required by all components.

public interface class IComponent : IDisposable
[System.ComponentModel.TypeConverter(typeof(System.ComponentModel.ComponentConverter))]
[System.Runtime.InteropServices.ComVisible(true)]
public interface IComponent : IDisposable
type IComponent = interface
    interface IDisposable
Public Interface IComponent
Implements IDisposable
衍生
屬性
實作

範例

下列程式碼範例示範如何執行IComponentISiteIContainer介面。The following code example demonstrates how to implement the IComponent, ISite, and IContainer interfaces.

/// <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
{
    private IComponent m_curComponent;
    private IContainer m_curContainer;
    private bool m_bDesignMode;
    private 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
    {
        get
        {
            return m_curComponent;
        }
    }

    public virtual IContainer Container
    {
        get
        {
            return m_curContainer;
        }
    }
    
    public virtual bool DesignMode
    {
        get
        {
            return m_bDesignMode;
        }
    }

    public virtual string Name
    {
        get
        {
            return m_ISBNCmpName;
        }

        set
        {
            m_ISBNCmpName = value;
        }
    }

    //Support the IServiceProvider interface.
    public virtual object GetService(Type serviceType)
    {
        //This example does not use any service object.
        return 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;
    private ISite m_curISBNSite;
    private string m_bookTitle;
    private string m_bookAuthor;

    public BookComponent(string Title, string Author)
    {
        m_curISBNSite = null;
        Disposed = null;
        m_bookTitle = Title;
        m_bookAuthor = Author;
    }

    public string Title
    {
        get
        {
            return m_bookTitle;
        }
    }

    public string Author
    {
        get
        {
            return m_bookAuthor;
        }
    }

    public virtual void Dispose()
    {	
        //There is nothing to clean.
        if(Disposed != null)
            Disposed(this,EventArgs.Empty);
    }

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

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

        return false;
    }

    public override int GetHashCode()
    {
        return 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

備註

Component是的預設實IComponent作為, 並可作為 common language runtime 中所有元件的基類。Component is the default implementation of IComponent and serves as the base class for all components in the common language runtime.

您可以在容器中包含元件。You can contain components in a container. 在此內容中, 內含專案是指邏輯內含專案, 而不是視覺化內含專案。In this context, containment refers to logical containment, not visual containment. 在各種情況下, 您可以使用 visual 和非視覺效果的元件和容器。You can use components and containers in a variety of scenarios, both visual and non visual.

System.Windows.Forms.Control繼承自Component, 預設的IComponent執行。System.Windows.Forms.Control inherits from Component, the default implementation of IComponent.

元件主要是透過容器所提供ISite的來與其容器互動, 這是容器特定的每個元件資訊的存放庫。A component interacts with its container primarily through a container-provided ISite, which is a repository of container-specific per-component information.

給實施者的注意事項

若要成為元件, 類別必須執行IComponent介面, 並提供不需要任何參數或單一參數類型IContainer的基本函式。To be a component, a class must implement the IComponent interface and provide a basic constructor that requires no parameters or a single parameter of type IContainer. 如需有關如何執行IComponent的詳細資訊, 請參閱使用元件進行程式設計For more information about implementing IComponent, see Programming with Components.

屬性

Site

取得或設定與 ISite 相關聯的 IComponentGets or sets the ISite associated with the IComponent.

方法

Dispose()

執行與釋放 (Free)、釋放 (Release) 或重設 Unmanaged 資源相關聯之應用程式定義的工作。Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

(繼承來源 IDisposable)

事件

Disposed

表示處理元件的 Disposed 事件的方法。Represents the method that handles the Disposed event of a component.

適用於

另請參閱