FeatureConnectorAttribute Class

Статья
02/23/2011

Indicates the type of FeatureConnector<TFeatureProviderType> required to handle the FeatureProvider.

Inheritance Hierarchy

System.Object
System.Attribute
Microsoft.Windows.Design.Features.FeatureConnectorAttribute

Namespace: Microsoft.Windows.Design.Features
Assembly: Microsoft.Windows.Design.Extensibility (in Microsoft.Windows.Design.Extensibility.dll)

Syntax

'Declaration
<AttributeUsageAttribute(AttributeTargets.Class, AllowMultiple := True)> _
Public NotInheritable Class FeatureConnectorAttribute _
    Inherits Attribute

[AttributeUsageAttribute(AttributeTargets.Class, AllowMultiple = true)]
public sealed class FeatureConnectorAttribute : Attribute

[AttributeUsageAttribute(AttributeTargets::Class, AllowMultiple = true)]
public ref class FeatureConnectorAttribute sealed : public Attribute

[<Sealed>]
[<AttributeUsageAttribute(AttributeTargets.Class, AllowMultiple = true)>]
type FeatureConnectorAttribute =  
    class
        inherit Attribute
    end

public final class FeatureConnectorAttribute extends Attribute

The FeatureConnectorAttribute type exposes the following members.

Constructors

	Name	Description
	FeatureConnectorAttribute	Initializes a new instance of the FeatureConnectorAttribute class.

Top

Properties

	Name	Description
	FeatureConnectorType	Gets the type of FeatureConnector<TFeatureProviderType> to instantiate.
	TypeId	Gets an object that is used to determine unique attributes. (Overrides Attribute.TypeId.)

Top

Methods

	Name	Description
	Equals	Returns a value that indicates whether this instance is equal to a specified object. (Overrides Attribute.Equals(Object).)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Returns the hash code for this instance. (Overrides Attribute.GetHashCode().)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IsDefaultAttribute	When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
	Match	When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

Top

Explicit Interface Implementations

	Name	Description
	_Attribute.GetIDsOfNames	Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
	_Attribute.GetTypeInfo	Retrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
	_Attribute.GetTypeInfoCount	Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
	_Attribute.Invoke	Provides access to properties and methods exposed by an object. (Inherited from Attribute.)

Top

Remarks

Apply the FeatureConnectorAttribute to your custom FeatureProvider class to specify a FeatureConnector<TFeatureProviderType> that publishes a service required by your FeatureProvider.

Examples

The following code example shows how to use the FeatureConnectorAttribute to associate a FeatureConnector<TFeatureProviderType> class with a custom feature provider named DiagnosticsMenuProvider. For a complete code listing, see How to: Create a Custom Feature Connector.

' The DiagnosticsMenuProvider class adds a context menu item
' that displays a dialog box listing the currently running and 
' pending feature connectors. 
<FeatureConnector(GetType(DiagnosticsFeatureConnector))>  _
Public Class DiagnosticsMenuProvider
    Inherits PrimarySelectionContextMenuProvider

    Public Sub New() 
        Dim action As New MenuAction("Feature Diagnostics...")

        AddHandler action.Execute, AddressOf action_Execute 

        Items.Add(action)    
    End Sub

    Sub action_Execute(ByVal sender As Object, ByVal e As MenuActionEventArgs) 
        Dim service As IDiagnosticsService = e.Context.Services.GetRequiredService(Of IDiagnosticsService)()

        service.ShowWindow()

    End Sub

End Class

// The DiagnosticsMenuProvider class adds a context menu item
// that displays a dialog box listing the currently running and 
// pending feature connectors. 
[FeatureConnector(typeof(DiagnosticsFeatureConnector))]
public class DiagnosticsMenuProvider : PrimarySelectionContextMenuProvider 
{
    public DiagnosticsMenuProvider() 
    {
        MenuAction action = new MenuAction("Feature Diagnostics...");

        action.Execute += new EventHandler<MenuActionEventArgs>(action_Execute); 

        Items.Add(action);
    }

    void action_Execute(object sender, MenuActionEventArgs e)
    {
        IDiagnosticsService service = 
            e.Context.Services.GetRequiredService<IDiagnosticsService>();

        service.ShowWindow();
    }
}

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Поделиться через