Interface IProvideAttributeTable

Artigo
08/01/2011

Define uma classe que fornece uma tabela de atributos.

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

Sintaxe

'Declaração
Public Interface IProvideAttributeTable

public interface IProvideAttributeTable

public interface class IProvideAttributeTable

type IProvideAttributeTable =  interface end

public interface IProvideAttributeTable

O tipo IProvideAttributeTable expõe os membros a seguir.

Propriedades

	Nome	Descrição
	AttributeTable	Obtém a tabela de atributos fornecida pela classe.

Início

Comentários

Implementar a IProvideAttributeTable interface para fornecer os atributos de metadados de tempo de design para uma ferramenta de design, como Visual Studio e Expression Blend. Para obter mais informações, consulte AttributeTable e Fornecimento de metadados de tempo de design.

Exemplos

O exemplo de código a seguir mostra como implementar a IProvideAttributeTable interface para criar e preencher uma tabela de atributo. For more information, see Walkthrough: Criando um adorno em tempo de design.

Imports System
Imports System.Collections
Imports System.Collections.Generic
Imports System.ComponentModel
Imports System.Reflection
Imports System.Text
Imports System.Windows.Media
Imports System.Windows.Controls
Imports System.Windows

Imports Microsoft.Windows.Design
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))> 

' 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()

            ' Apply the ReadOnlyAttribute to the Background property 
            ' of the Button class.
            builder.AddCustomAttributes(GetType(Button), "Background", New ReadOnlyAttribute(True))

            Dim attributes As AttributeTable = builder.CreateTable()

            Dim hasCustomAttributes As Boolean = attributes.ContainsAttributes(GetType(Button))

            Dim types As IEnumerable(Of Type) = attributes.AttributedTypes

            ' The following code shows how to retrieve custom attributes
            ' using the GetCustomAttributes method overloads.
            Dim attrs0 As IEnumerable = attributes.GetCustomAttributes(GetType(Button))

            Dim attrs1 As IEnumerable = attributes.GetCustomAttributes(GetType(Button), "Background")

            Return attributes
        End Get
    End Property
End Class

using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Reflection;
using System.Text;
using System.Windows.Media;
using System.Windows.Controls;
using System.Windows;

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();

                // Apply the ReadOnlyAttribute to the Background property 
                // of the Button class.
                builder.AddCustomAttributes(
                    typeof(Button),
                    "Background",
                    new ReadOnlyAttribute(true));

                AttributeTable attributes = builder.CreateTable();

                bool hasCustomAttributes = attributes.ContainsAttributes(typeof(Button));

                IEnumerable<Type> types = attributes.AttributedTypes;

                // The following code shows how to retrieve custom attributes
                // using the GetCustomAttributes method overloads.
                IEnumerable attrs0 = attributes.GetCustomAttributes(typeof(Button));

                IEnumerable attrs1 = attributes.GetCustomAttributes(
                    typeof(Button),
                    "Background");

                return attributes;
            }
        }
    }
}