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FeatureAttribute Class

  • Artykuł

Stores a Type object that represents a FeatureProvider type.

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

'Usage
Dim instance As FeatureAttribute

[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

public final class FeatureAttribute extends Attribute

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 IRegisterMetadata. If found, designers instantiate  
' this class and call its Register() method automatically. 
Friend Class Metadata
    Implements IRegisterMetadata

    ' Called by the designer to register any design-time metadata. 
    Public Sub Register() Implements IRegisterMetadata.Register
        Dim builder As New AttributeTableBuilder()

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

        MetadataStore.AddAttributeTable(builder.CreateTable())
    End Sub 

End Class

// Container for any general design-time metadata to initialize. 
// Designers look for a type in the design-time assembly that  
// implements IRegisterMetadata. If found, designers instantiate  
// this class and call its Register() method automatically. 
internal class Metadata : IRegisterMetadata
{
    // Called by the designer to register any design-time metadata. 
    public void Register()
    {
        AttributeTableBuilder builder = new AttributeTableBuilder();

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

        MetadataStore.AddAttributeTable(builder.CreateTable());
    }
}

Inheritance Hierarchy

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

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.

See Also

Reference

FeatureAttribute Members

Microsoft.Windows.Design.Features Namespace

FeatureProvider

Other Resources

Feature Providers and Feature Connectors