DesignerSerializationVisibilityAttribute Clase

Definición

public ref class DesignerSerializationVisibilityAttribute sealed : Attribute

[System.AttributeUsage(System.AttributeTargets.Event | System.AttributeTargets.Field | System.AttributeTargets.Method | System.AttributeTargets.Property)]
public sealed class DesignerSerializationVisibilityAttribute : Attribute

public sealed class DesignerSerializationVisibilityAttribute : Attribute

[System.AttributeUsage(System.AttributeTargets.Method | System.AttributeTargets.Property)]
public sealed class DesignerSerializationVisibilityAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.Event | System.AttributeTargets.Field | System.AttributeTargets.Method | System.AttributeTargets.Property)>]
type DesignerSerializationVisibilityAttribute = class
    inherit Attribute

type DesignerSerializationVisibilityAttribute = class
    inherit Attribute

[<System.AttributeUsage(System.AttributeTargets.Method | System.AttributeTargets.Property)>]
type DesignerSerializationVisibilityAttribute = class
    inherit Attribute

Public NotInheritable Class DesignerSerializationVisibilityAttribute
Inherits Attribute

Herencia

Object

Attribute

DesignerSerializationVisibilityAttribute

Atributos

AttributeUsageAttribute

Ejemplos

En el ejemplo de código siguiente se muestra el uso de un DesignerSerializationVisibilityAttribute conjunto en Content. Conserva los valores de una propiedad pública de un control de usuario, que se puede configurar en tiempo de diseño. Para usar el ejemplo, compile primero el código siguiente en una biblioteca de control de usuario. A continuación, agregue una referencia al archivo de .dll compilado en un nuevo proyecto de aplicación de Windows. Si usa Visual Studio, ContentSerializationExampleControl se agrega automáticamente al cuadro de herramientas.

Arrastre el control del Cuadro de herramientas a un formulario y establezca las propiedades del DimensionData objeto enumerado en el ventana Propiedades. Al ver el código del formulario, el código se habrá agregado al InitializeComponent método del formulario primario. Este código establece los valores de las propiedades del control en los que se han establecido en modo de diseño.

#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>
#using <System.dll>

using namespace System;
using namespace System::Collections;
using namespace System::ComponentModel;
using namespace System::ComponentModel::Design;
using namespace System::Drawing;
using namespace System::Windows::Forms;

// This attribute indicates that the public properties of this object should be listed in the property grid.

[TypeConverterAttribute(System::ComponentModel::ExpandableObjectConverter::typeid)]
public ref class DimensionData
{
private:
   Control^ owner;

internal:

   // This class reads and writes the Location and Size properties from the Control which it is initialized to.
   DimensionData( Control^ owner )
   {
      this->owner = owner;
   }

public:

   property Point Location 
   {
      Point get()
      {
         return owner->Location;
      }

      void set( Point value )
      {
         owner->Location = value;
      }

   }

   property Size FormSize 
   {
      Size get()
      {
         return owner->Size;
      }

      void set( Size value )
      {
         owner->Size = value;
      }
   }
};

// The code for this user control declares a public property of type DimensionData with a DesignerSerializationVisibility 
// attribute set to DesignerSerializationVisibility.Content, indicating that the properties of the object should be serialized.
// The public, not hidden properties of the object that are set at design time will be persisted in the initialization code
// for the class object. Content persistence will not work for structs without a custom TypeConverter.  
public ref class ContentSerializationExampleControl: public System::Windows::Forms::UserControl
{
private:
   System::ComponentModel::Container^ components;

public:

   property DimensionData^ Dimensions 
   {
      [DesignerSerializationVisibility(DesignerSerializationVisibility::Content)]
      DimensionData^ get()
      {
         return gcnew DimensionData( this );
      }
   }
   ContentSerializationExampleControl()
   {
      InitializeComponent();
   }

public:
   ~ContentSerializationExampleControl()
   {
      if ( components != nullptr )
      {
         delete components;
      }
   }

private:
   void InitializeComponent()
   {
      components = gcnew System::ComponentModel::Container;
   }
};

using System;
using System.Collections;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing;
using System.Windows.Forms;

namespace DesignerSerializationVisibilityTest
{
    // The code for this user control declares a public property of type DimensionData with a DesignerSerializationVisibility 
    // attribute set to DesignerSerializationVisibility.Content, indicating that the properties of the object should be serialized.

    // The public, not hidden properties of the object that are set at design time will be persisted in the initialization code
    // for the class object. Content persistence will not work for structs without a custom TypeConverter.		

    public class ContentSerializationExampleControl : System.Windows.Forms.UserControl
    {
    private System.ComponentModel.Container components = null;				
    
    [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
    public DimensionData Dimensions
    {
        get 
        {
        return new DimensionData(this);
        }		
    }

    public ContentSerializationExampleControl()
    {
            InitializeComponent();		
    }
        
    protected override void Dispose( bool disposing )
    {
        if( disposing )
        {
        if( components != null )
            components.Dispose();
        }
        base.Dispose( disposing );
    }

    private void InitializeComponent()
    {
        components = new System.ComponentModel.Container();
    }
    }

    [TypeConverterAttribute(typeof(System.ComponentModel.ExpandableObjectConverter))]
    // This attribute indicates that the public properties of this object should be listed in the property grid.
    public class DimensionData
    {		
    private Control owner;

    // This class reads and writes the Location and Size properties from the Control which it is initialized to.
    internal DimensionData(Control owner)
    {
            this.owner = owner;			
    }

    public Point Location
    {
        get
        {
        return owner.Location;
        }
        set
        {
        owner.Location = value;
        }
    }

    public Size FormSize
    {
        get
            {
        return owner.Size;
        }
        set
        {
        owner.Size = value;
        }
    }
    }
}

Imports System.Collections
Imports System.ComponentModel
Imports System.ComponentModel.Design
Imports System.Drawing
Imports System.Windows.Forms

Namespace DesignerSerializationVisibilityTest
    _
    ' The code for this user control declares a public property of type DimensionData with a DesignerSerializationVisibility 
    ' attribute set to DesignerSerializationVisibility.Content, indicating that the properties of the object should be serialized.

    ' The public, not hidden properties of the object that are set at design time will be persisted in the initialization code
    ' for the class object. Content persistence will not work for structs without a custom TypeConverter.		
    Public Class ContentSerializationExampleControl
        Inherits System.Windows.Forms.UserControl
        Private components As System.ComponentModel.Container = Nothing


        <DesignerSerializationVisibility(DesignerSerializationVisibility.Content)> _
        Public ReadOnly Property Dimensions() As DimensionData
            Get
                Return New DimensionData(Me)
            End Get
        End Property


        Public Sub New()
            InitializeComponent()
        End Sub


        Protected Overloads Sub Dispose(ByVal disposing As Boolean)
            If disposing Then
                If (components IsNot Nothing) Then
                    components.Dispose()
                End If
            End If
            MyBase.Dispose(disposing)
        End Sub


        Private Sub InitializeComponent()
        End Sub
    End Class

    ' This attribute indicates that the public properties of this object should be listed in the property grid.
   <TypeConverterAttribute(GetType(System.ComponentModel.ExpandableObjectConverter))> _   
    Public Class DimensionData
        Private owner As Control

        ' This class reads and writes the Location and Size properties from the Control which it is initialized to.
        Friend Sub New(ByVal owner As Control)
            Me.owner = owner
        End Sub


        Public Property Location() As Point
            Get
                Return owner.Location
            End Get
            Set(ByVal Value As Point)
                owner.Location = Value
            End Set
        End Property


        Public Property FormSize() As Size
            Get
                Return owner.Size
            End Get
            Set(ByVal Value As Size)
                owner.Size = Value
            End Set
        End Property
    End Class
End Namespace 'DesignerSerializationVisibilityTest

Comentarios

Cuando un serializador conserva el estado persistente de un documento en modo de diseño, a menudo agrega código al método de inicialización de componentes para conservar los valores de las propiedades que se han establecido en tiempo de diseño. Esto sucede de forma predeterminada para la mayoría de los tipos básicos, si no se ha establecido ningún atributo para dirigir otro comportamiento.

DesignerSerializationVisibilityAttributeCon , puede indicar si el valor de una propiedad es Visible, y debe conservarse en el código de inicialización, Hidden, y no debe conservarse en el código de inicialización, o consta de Content, que debe tener código de inicialización generado para cada propiedad pública, no oculta del objeto asignado a la propiedad .

Los miembros que no tienen un DesignerSerializationVisibilityAttribute se tratarán como si tuvieran un DesignerSerializationVisibilityAttribute con un valor de Visible. Los valores de una propiedad marcada como Visible se serializarán, si es posible, mediante un serializador para el tipo. Para especificar la serialización personalizada para un tipo o propiedad concretos, use .DesignerSerializerAttribute

Para obtener más información, consulte Attributes (Atributos).

Constructores

Campos

Propiedades

Métodos

Implementaciones de interfaz explícitas

Se aplica a

Consulte también

• Attribute
• PropertyDescriptor
• AttributeCollection
• PropertyDescriptorCollection
• Cómo: Serializar colecciones de tipos estándar con DesignerSerializationVisibilityAttribute