ToolboxBrowsableAttribute Class

Статья
02/23/2011

Specifies whether a control is visible in a designer's toolbox browser.

Inheritance Hierarchy

System.Object
System.Attribute
Microsoft.Windows.Design.ToolboxBrowsableAttribute

Namespace: Microsoft.Windows.Design
Assembly: Microsoft.Windows.Design.Interaction (in Microsoft.Windows.Design.Interaction.dll)

Syntax

'Declaration
<AttributeUsageAttribute(AttributeTargets.Class)> _
Public NotInheritable Class ToolboxBrowsableAttribute _
    Inherits Attribute

[AttributeUsageAttribute(AttributeTargets.Class)]
public sealed class ToolboxBrowsableAttribute : Attribute

[AttributeUsageAttribute(AttributeTargets::Class)]
public ref class ToolboxBrowsableAttribute sealed : public Attribute

[<Sealed>]
[<AttributeUsageAttribute(AttributeTargets.Class)>]
type ToolboxBrowsableAttribute =  
    class
        inherit Attribute
    end

public final class ToolboxBrowsableAttribute extends Attribute

The ToolboxBrowsableAttribute type exposes the following members.

Constructors

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

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Properties

	Name	Description
	Browsable	Gets the Browsable flag associated with this attribute.
	No	Gets a ToolboxBrowsableAttribute with Browsable set to false.
	TypeId	When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)
	Yes	Gets a ToolboxBrowsableAttribute with Browsable set to true.

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Methods

	Name	Description
	Equals	Infrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
	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. (Inherited from Attribute.)
	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 the ToolboxBrowsableAttribute to specify when a control is visible in the Choose Toolbox Items dialog box for the WPF Designer for Visual Studio or the Asset Library for Microsoft Blend.

Examples

The following code example shows how to use the ToolboxBrowsableAttribute to enable visibility for a custom control in a designer's toolbox browser.

Imports System
Imports System.Collections.Generic
Imports System.Text
Imports System.ComponentModel
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.Design.Metadata))> 

Public Class ButtonWithDesignTime
    Inherits Button
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.
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()

            builder.AddCustomAttributes( _
                GetType(ButtonWithDesignTime), _
                New ToolboxBrowsableAttribute(True))

            Return builder.CreateTable()
        End Get
    End Property

End Class

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

using Microsoft.Windows.Design;
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.Design.Metadata))]

namespace CustomControlLibrary.Design
{
    public class ButtonWithDesignTime : Button
    {
    }

    // 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();

                builder.AddCustomAttributes(
                    typeof(ButtonWithDesignTime),
                    new ToolboxBrowsableAttribute(true));

                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.

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