FeatureConnector<TFeatureProviderType> 类
更新：2007 年 11 月
为所有基于功能连接器的扩展性提供基实现。
命名空间： Microsoft.Windows.Design.Features
程序集： Microsoft.Windows.Design.Extensibility（在 Microsoft.Windows.Design.Extensibility.dll 中）
语法
声明
Public MustInherit Class FeatureConnector(Of TFeatureProviderType As FeatureProvider) _
Implements IDisposable
用法
Dim instance As FeatureConnector(Of TFeatureProviderType)
public abstract class FeatureConnector<TFeatureProviderType> : IDisposable
where TFeatureProviderType : FeatureProvider
generic<typename TFeatureProviderType>
where TFeatureProviderType : FeatureProvider
public ref class FeatureConnector abstract : IDisposable
JScript 不支持泛型类型或方法。
类型参数
- TFeatureProviderType
功能提供程序的类型。
备注
需要实现与 WPF 设计器最深层的集成时，可从 FeatureConnector<TFeatureProviderType> 抽象类派生。功能连接器可以订阅全局服务，并可以添加它们自己的服务。
功能提供程序使用 FeatureConnectorAttribute 指定相关联的功能连接器。
FeatureConnector<TFeatureProviderType> 基类为泛型并且使用 FeatureConnector<TFeatureProviderType> 所承载的功能提供程序的类型。
功能连接器是按需创建的。当 FeatureManager 类在 FeatureProvider 上发现 FeatureConnectorAttribute 时，便会创建指定的 FeatureConnector<TFeatureProviderType>（如果它尚不存在）。
FeatureConnector<TFeatureProviderType> 抽象类实现 IDisposable 接口，后者提升简单的清理实现。
FeatureConnector<TFeatureProviderType> 类的大多数功能在受保护的 CreateFeatureProviders 方法中实现。将一个对象传入此方法会使功能连接器在该对象上搜索 FeatureAttribute 类型。如果找到这些属性，则创建与每个属性相关联的 FeatureProvider 实例并在列表中返回这些实例。
示例
下面的代码示例演示如何从 FeatureConnector<TFeatureProviderType> 类派生以将名为 DiagnosticsMenuProvider 的自定义功能提供程序与名为 IDiagnosticsService 的自定义服务连接起来。有关完整的代码列表，请参见如何：创建自定义功能连接器。
' The IDiagnosticsService specifies a simple interface for showing
' a FeatureManagerDiagnostics window.
Interface IDiagnosticsService
Sub ShowWindow()
End Interface
...
' The DiagnosticsFeatureConnector publishes the IDiagnosticsService.
Class DiagnosticsFeatureConnector
Inherits FeatureConnector(Of DiagnosticsMenuProvider)
Implements IDiagnosticsService
Dim fmdWindow As FeatureManagerDiagnostics
Public Sub New(ByVal manager As FeatureManager)
MyBase.New(manager)
Context.Services.Publish(Of IDiagnosticsService)(Me)
End Sub
' The showWindow method creates a FeatureManagerDiagnostics
' window and shows it.
Public Sub ShowWindow() Implements IDiagnosticsService.ShowWindow
If fmdWindow IsNot Nothing Then
' Show the FeatureManagerDiagnostics window.
fmdWindow.Show()
' Activate the
fmdWindow.Activate()
Else
fmdWindow = New FeatureManagerDiagnostics()
fmdWindow.Initialize(Manager)
AddHandler fmdWindow.Closed, AddressOf fmdWindow_Closed
fmdWindow.Show()
End If
End Sub
Sub fmdWindow_Closed(ByVal sender As Object, ByVal e As EventArgs)
fmdWindow = Nothing
End Sub
End Class
// The IDiagnosticsService specifies a simple interface for showing
// a FeatureManagerDiagnostics window.
interface IDiagnosticsService
{
void ShowWindow();
}
...
// The DiagnosticsFeatureConnector publishes the IDiagnosticsService.
class DiagnosticsFeatureConnector : FeatureConnector<DiagnosticsMenuProvider>,
IDiagnosticsService
{
FeatureManagerDiagnostics fmdWindow;
public DiagnosticsFeatureConnector(FeatureManager manager)
: base(manager)
{
Context.Services.Publish<IDiagnosticsService>(this);
}
#region IDiagnosticsService Members
// The showWindow method creates a FeatureManagerDiagnostics
// window and shows it.
public void ShowWindow()
{
if (fmdWindow != null)
{
fmdWindow.Show();
fmdWindow.Activate();
}
else
{
fmdWindow = new FeatureManagerDiagnostics();
fmdWindow.Initialize(Manager);
fmdWindow.Closed += new EventHandler(fmdWindow_Closed);
fmdWindow.Show();
}
}
void fmdWindow_Closed(object sender, EventArgs e)
{
fmdWindow = null;
}
#endregion
}
继承层次结构
System.Object
Microsoft.Windows.Design.Features.FeatureConnector<TFeatureProviderType>
Microsoft.Windows.Design.Features.PolicyDrivenFeatureConnector<TFeatureProviderType>
线程安全
此类型的任何公共 static（在 Visual Basic 中为 Shared） 成员都是线程安全的。但不保证所有实例成员都是线程安全的。
另请参见
参考
FeatureConnector<TFeatureProviderType> 成员
Microsoft.Windows.Design.Features 命名空间