FeatureAttribute Class

Article
02/23/2011

Stores a Type object that represents a FeatureProvider type.

Inheritance Hierarchy

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

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

Syntax

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

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

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

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

public final class FeatureAttribute extends Attribute

The FeatureAttribute type exposes the following members.

Constructors

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

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Properties

	Name	Description
	FeatureProviderType	Gets the FeatureProvider type to instantiate.
	TypeId	Gets a unique identifier for this attribute. (Overrides Attribute.TypeId.)

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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.)

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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.)

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Remarks

Use FeatureAttribute to attach a design-time feature to a type.

The feature provider defined in this attribute is instantiated on demand by the designer. For more information, see Feature Providers and Feature Connectors.

Examples

The following code example shows how to create a FeatureAttribute to associate an adorner provider with a control class. For more information, see Walkthrough: Creating a Design-time Adorner.

' Container for any general design-time metadata to initialize.
' Designers look for a type in the design-time assembly that 
' implements IProvideAttributeTable. If found, designers instantiate
' this class and access its AttributeTable property automatically.
Friend Class Metadata
    Implements IProvideAttributeTable

    ' Accessed by the designer to register any design-time metadata.
    Public ReadOnly Property AttributeTable() As AttributeTable _
        Implements IProvideAttributeTable.AttributeTable
        Get
            Dim builder As New AttributeTableBuilder()

            ' Add the adorner provider to the design-time metadata.
            builder.AddCustomAttributes(GetType(ButtonWithDesignTime), _
                                        New FeatureAttribute(GetType(OpacitySliderAdornerProvider)))

            Return builder.CreateTable()
        End Get
    End Property


End Class

// Container for any general design-time metadata to initialize.
// Designers look for a type in the design-time assembly that 
// implements IProvideAttributeTable. If found, designers instantiate 
// this class and access its AttributeTable property automatically.
internal class Metadata : IProvideAttributeTable
{
    // Accessed by the designer to register any design-time metadata.
    public AttributeTable AttributeTable
    {
        get 
        {
            AttributeTableBuilder builder = new AttributeTableBuilder();

            // Add the adorner provider to the design-time metadata.
            builder.AddCustomAttributes(
                typeof(ButtonWithDesignTime),
                new FeatureAttribute(typeof(OpacitySliderAdornerProvider)));

            return builder.CreateTable();
        }
    }
}

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.