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ProvideMetadataAttribute Class

Represents a class that provides metadata.

Inheritance Hierarchy

System.Object
  System.Attribute
    Microsoft.Windows.Design.Metadata.ProvideMetadataAttribute

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

Syntax

'Declaration
<AttributeUsageAttribute(AttributeTargets.Assembly, AllowMultiple := True)> _
Public NotInheritable Class ProvideMetadataAttribute _
    Inherits Attribute
[AttributeUsageAttribute(AttributeTargets.Assembly, AllowMultiple = true)]
public sealed class ProvideMetadataAttribute : Attribute
[AttributeUsageAttribute(AttributeTargets::Assembly, AllowMultiple = true)]
public ref class ProvideMetadataAttribute sealed : public Attribute
[<Sealed>]
[<AttributeUsageAttribute(AttributeTargets.Assembly, AllowMultiple = true)>]
type ProvideMetadataAttribute =  
    class
        inherit Attribute
    end
public final class ProvideMetadataAttribute extends Attribute

The ProvideMetadataAttribute type exposes the following members.

Constructors

  Name Description
Public method ProvideMetadataAttribute Initializes a new instance of the ProvideMetadataAttribute class.

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Properties

  Name Description
Public property MetadataProviderType Gets the type that implements the IProvideAttributeTable interface.
Public property TypeId When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)

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Methods

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

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Explicit Interface Implementations

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

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Remarks

Add this attribute to your assembly to declare types that provide metadata. The types in the assembly implement the IProvideAttributeTable interface to provide design-time metadata attributes to design tools, such as Visual Studio and Expression Blend. For more information, see Providing Design-time Metadata.

Examples

The following code example shows how to create and populate an attribute table. For more information, see Walkthrough: Creating a Design-time Adorner.

Imports System
Imports System.Collections.Generic
Imports System.Text
Imports System.ComponentModel
Imports System.Windows.Media
Imports System.Windows.Controls
Imports System.Windows
Imports CustomControlLibrary
Imports Microsoft.Windows.Design.Features
Imports Microsoft.Windows.Design.Metadata

' The ProvideMetadata assembly-level attribute indicates to designers
' that this assembly contains a class that provides an attribute table. 
<Assembly: ProvideMetadata(GetType(CustomControlLibrary.VisualStudio.Design.Metadata))> 

Namespace CustomControlLibrary.VisualStudio.Design

    ' 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

End Namespace
using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
using System.Windows.Media;
using System.Windows.Controls;
using System.Windows;

using CustomControlLibrary;
using Microsoft.Windows.Design.Features;
using Microsoft.Windows.Design.Metadata;

// The ProvideMetadata assembly-level attribute indicates to designers
// that this assembly contains a class that provides an attribute table. 
[assembly: ProvideMetadata(typeof(CustomControlLibrary.VisualStudio.Design.Metadata))]
namespace CustomControlLibrary.VisualStudio.Design
{
    // 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.

See Also

Reference

Microsoft.Windows.Design.Metadata Namespace

AttributeTable

AttributeTableBuilder

Other Resources

Providing Design-time Metadata