ISite 接口

定义

命名空间:

System.ComponentModel

程序集:

System.ComponentModel.Primitives.dll

提供站点所需的功能。

public interface class ISite : IServiceProvider

public interface ISite : IServiceProvider

type ISite = interface
    interface IServiceProvider

Public Interface ISite
Implements IServiceProvider

派生

System.ComponentModel.INestedSite

System.Workflow.ComponentModel.Design.TypeBrowserDialog

实现

IServiceProvider

示例

以下示例演示在库容器中使用的 、 IComponent和 IContainer 的ISite实现。

/// <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

站点将 绑定到 Component 并 Container 启用它们之间的通信，并为容器管理其组件提供一种方法。

站点还可以充当特定于容器、每个组件的信息（例如组件名称）的存储库。

实施者说明

若要成为站点，类必须实现 ISite 接口。

属性

Component	当由类实现时，获取与 ISite 关联的组件。
Container	当由类实现时，获取与 IContainer 关联的 ISite。
DesignMode	确定组件在由类实现时是否处于设计模式。
Name	当由类实现时，获取或设置与 ISite 关联的组件的名称。

方法

GetService(Type)

获取指定类型的服务对象。 (继承自 IServiceProvider)

扩展方法

GetKeyedService<T>(IServiceProvider, Object)	从 IServiceProvider获取 类型的T服务。
GetKeyedServices(IServiceProvider, Type, Object)	从 IServiceProvider获取 类型的serviceType服务的枚举。
GetKeyedServices<T>(IServiceProvider, Object)	从 IServiceProvider获取 类型的T服务的枚举。
GetRequiredKeyedService(IServiceProvider, Type, Object)	从 IServiceProvider获取 类型的serviceType服务。
GetRequiredKeyedService<T>(IServiceProvider, Object)	从 IServiceProvider获取 类型的T服务。
CreateAsyncScope(IServiceProvider)	新建可用于解析作用域内服务的 AsyncServiceScope。
CreateScope(IServiceProvider)	新建可用于解析作用域内服务的 IServiceScope。
GetRequiredService(IServiceProvider, Type)	从 IServiceProvider 获取类型 serviceType 的服务。
GetRequiredService<T>(IServiceProvider)	从 IServiceProvider 获取类型 T 的服务。
GetService<T>(IServiceProvider)	从 IServiceProvider 获取类型 T 的服务。
GetServices(IServiceProvider, Type)	从 IServiceProvider 获取 serviceType 类型服务的枚举。
GetServices<T>(IServiceProvider)	从 IServiceProvider 获取 T 类型服务的枚举。
GetFakeLogCollector(IServiceProvider)	获取对象，该对象收集发送到假记录器中的日志记录。
GetFakeRedactionCollector(IServiceProvider)	从依赖项注入容器中获取假的重设函数收集器实例。

另请参阅

• Component
• IComponent
• Container
• IContainer
• 扩展设计时支持