IComponent IComponent IComponent IComponent Interface

定义

提供全部组件所需的功能。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
派生
属性
实现

示例

下面的代码示例演示如何实现IComponentISite,和IContainer接口。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

注解

Component 是的默认实现IComponent,并作为公共语言运行时中的所有组件的基类。Component is the default implementation of IComponent and serves as the base class for all components in the common language runtime.

可以包含在容器中的组件。You can contain components in a container. 在此上下文中,包含引用逻辑包容,而不是直观包容。In this context, containment refers to logical containment, not visual containment. 可以使用组件和中的各种方案,visual 和非直观的容器。You can use components and containers in a variety of scenarios, both visual and non visual.

System.Windows.Forms.Control 继承自Component的默认实现IComponentSystem.Windows.Forms.Control inherits from Component, the default implementation of IComponent.

与主要通过容器提供其容器的一个组件交互ISite,这是特定于容器的每个组件信息的存储库。A component interacts with its container primarily through a container-provided ISite, which is a repository of container-specific per-component information.

实施者说明

若要将一个组件,类必须实现IComponent接口,并提供基本的构造函数需要无参数或类型的单个参数IContainerTo 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. 有关实现详细信息IComponent,请参阅使用组件编程For more information about implementing IComponent, see Programming with Components.

属性

Site Site Site Site

获取或设置与 ISite 关联的 IComponentGets or sets the ISite associated with the IComponent.

事件

Disposed Disposed Disposed Disposed

表示处理组件的 Disposed 事件的方法。Represents the method that handles the Disposed event of a component.

方法

Dispose() Dispose() Dispose() Dispose()

执行与释放或重置非托管资源关联的应用程序定义的任务。Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

(Inherited from IDisposable)

适用于

另请参阅