ViewTechnology Enumeração
Definição
Importante
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Define os identificadores de um conjunto de tecnologias compatíveis com hosts de designer.
public enum class ViewTechnologypublic enum ViewTechnology[System.Runtime.InteropServices.ComVisible(true)]
public enum ViewTechnologytype ViewTechnology = [<System.Runtime.InteropServices.ComVisible(true)>]
type ViewTechnology = Public Enum ViewTechnology- Herança
- Atributos
Campos
| Default | 2 | Especifica o suporte de tecnologia de exibição padrão. O designer raiz pode retornar qualquer tipo de objeto, mas o objeto deve ser compatível com um adaptador para a tecnologia do host. Ambientes de hospedagem, como o Visual Studio, fornecem uma maneira de conectar novos adaptadores de tecnologia de exibição. O objeto de exibição padrão para o designer do Windows Forms é uma instância de Control. |
| Passthrough | 0 | Representa um modo no qual o objeto de exibição é passado diretamente para o ambiente de desenvolvimento. O objeto de exibição deve implementar qualquer interface exigida pelo ambiente de desenvolvimento. O ambiente de desenvolvimento do Visual Studio dá suporte a objetos de exibição que são um controle ActiveX, um documento ativo ou um objeto que implementa a interface |
| WindowsForms | 1 | Representa um modo no qual um objeto de controle do Windows Forms fornece a exibição para o designer raiz. O host do designer preenche a janela do documento do ambiente de desenvolvimento com o controle do Windows Forms. |
Exemplos
O exemplo a seguir demonstra como usar ViewTechnology.Default em um designer. Este exemplo faz parte de um exemplo maior fornecido para a GetView interface .
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>
#using <System.Design.dll>
#using <System.dll>
using namespace System;
using namespace System::Collections;
using namespace System::ComponentModel;
using namespace System::ComponentModel::Design;
using namespace System::Diagnostics;
using namespace System::Drawing;
using namespace System::Windows::Forms;
using namespace System::Windows::Forms::Design;
namespace SampleRootDesigner
{
ref class SampleRootDesigner;
// This sample demonstrates how to provide the root designer view, or
// design mode background view, by overriding IRootDesigner.GetView().
// The following attribute associates the SampleRootDesigner designer
// with the SampleComponent component.
[Designer(SampleRootDesigner::typeid,IRootDesigner::typeid)]
public ref class RootDesignedComponent: public Component
{
public:
RootDesignedComponent(){}
};
public ref class SampleRootDesigner: public ComponentDesigner, public IRootDesigner
{
private:
ref class RootDesignerView;
// Member field of custom type RootDesignerView, a control that
// will be shown in the Forms designer view. This member is
// cached to reduce processing needed to recreate the
// view control on each call to GetView().
RootDesignerView^ m_view;
// This method returns an instance of the view for this root
// designer. The "view" is the user interface that is presented
// in a document window for the user to manipulate.
virtual Object^ GetView( ViewTechnology technology ) sealed = IRootDesigner::GetView
{
if ( technology != ViewTechnology::WindowsForms )
{
throw gcnew ArgumentException( "Not a supported view technology","technology" );
}
if ( m_view == nullptr )
{
// Some type of displayable Form or control is required
// for a root designer that overrides GetView(). In this
// example, a Control of type RootDesignerView is used.
// Any class that inherits from Control will work.
m_view = gcnew RootDesignerView( this );
}
return m_view;
}
// IRootDesigner.SupportedTechnologies is a required override for an
// IRootDesigner. WindowsForms is the view technology used by this designer.
public:
property array<ViewTechnology>^ SupportedTechnologies
{
virtual array<ViewTechnology>^ get()
{
return gcnew array<ViewTechnology> {ViewTechnology::Default};
}
}
// RootDesignerView is a simple control that will be displayed
// in the designer window.
ref class RootDesignerView: public Control
{
private:
SampleRootDesigner^ m_designer;
public:
RootDesignerView( SampleRootDesigner^ designer )
{
m_designer = designer;
BackColor = Color::Blue;
Font = gcnew System::Drawing::Font( Font->FontFamily->Name,24.0f );
}
protected:
virtual void OnPaint( PaintEventArgs^ pe ) override
{
Control::OnPaint( pe );
// Draws the name of the component in large letters.
pe->Graphics->DrawString( m_designer->Component->Site->Name, Font, Brushes::Yellow, ClientRectangle );
}
};
};
// This sample component inherits from RootDesignedComponent which
// uses the SampleRootDesigner.
public ref class RootViewSampleComponent: public RootDesignedComponent
{
public:
RootViewSampleComponent(){}
};
}
using System;
using System.Collections;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;
using System.Windows.Forms.Design;
namespace SampleRootDesigner
{
// This sample demonstrates how to provide the root designer view, or
// design mode background view, by overriding IRootDesigner.GetView().
// This sample component inherits from RootDesignedComponent which
// uses the SampleRootDesigner.
public class RootViewSampleComponent : RootDesignedComponent
{
public RootViewSampleComponent()
{
}
}
// The following attribute associates the SampleRootDesigner designer
// with the SampleComponent component.
[Designer(typeof(SampleRootDesigner), typeof(IRootDesigner))]
public class RootDesignedComponent : Component
{
public RootDesignedComponent()
{
}
}
public class SampleRootDesigner : ComponentDesigner, IRootDesigner
{
// Member field of custom type RootDesignerView, a control that
// will be shown in the Forms designer view. This member is
// cached to reduce processing needed to recreate the
// view control on each call to GetView().
private RootDesignerView m_view;
// This method returns an instance of the view for this root
// designer. The "view" is the user interface that is presented
// in a document window for the user to manipulate.
object IRootDesigner.GetView(ViewTechnology technology)
{
if (technology != ViewTechnology.Default)
{
throw new ArgumentException("Not a supported view technology", "technology");
}
if (m_view == null)
{
// Some type of displayable Form or control is required
// for a root designer that overrides GetView(). In this
// example, a Control of type RootDesignerView is used.
// Any class that inherits from Control will work.
m_view = new RootDesignerView(this);
}
return m_view;
}
// IRootDesigner.SupportedTechnologies is a required override for an
// IRootDesigner. Default is the view technology used by this designer.
ViewTechnology[] IRootDesigner.SupportedTechnologies
{
get
{
return new ViewTechnology[] {ViewTechnology.Default};
}
}
// RootDesignerView is a simple control that will be displayed
// in the designer window.
private class RootDesignerView : Control
{
private SampleRootDesigner m_designer;
public RootDesignerView(SampleRootDesigner designer)
{
m_designer = designer;
BackColor = Color.Blue;
Font = new Font(Font.FontFamily.Name, 24.0f);
}
protected override void OnPaint(PaintEventArgs pe)
{
base.OnPaint(pe);
// Draws the name of the component in large letters.
pe.Graphics.DrawString(m_designer.Component.Site.Name, Font, Brushes.Yellow, ClientRectangle);
}
}
}
}
Imports System.Collections
Imports System.ComponentModel
Imports System.ComponentModel.Design
Imports System.Diagnostics
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Windows.Forms.Design
Namespace SampleRootDesigner
' This sample demonstrates how to provide the root designer view, or
' design mode background view, by overriding IRootDesigner.GetView().
' This sample component inherits from RootDesignedComponent which
' uses the SampleRootDesigner.
Public Class RootViewSampleComponent
Inherits RootDesignedComponent
Public Sub New()
End Sub
End Class
' The following attribute associates the SampleRootDesigner designer
' with the SampleComponent component.
<Designer(GetType(SampleRootDesigner), GetType(IRootDesigner))> _
Public Class RootDesignedComponent
Inherits Component
Public Sub New()
End Sub
End Class
Public Class SampleRootDesigner
Inherits ComponentDesigner
Implements IRootDesigner
' Member field of custom type RootDesignerView, a control that
' will be shown in the Forms designer view. This member is
' cached to reduce processing needed to recreate the
' view control on each call to GetView().
Private m_view As RootDesignerView
' This method returns an instance of the view for this root
' designer. The "view" is the user interface that is presented
' in a document window for the user to manipulate.
Function GetView(ByVal technology As ViewTechnology) As Object Implements IRootDesigner.GetView
If Not technology = ViewTechnology.Default Then
Throw New ArgumentException("Not a supported view technology", "technology")
End If
If m_view Is Nothing Then
' Some type of displayable Form or control is required for a root designer that overrides
' GetView(). In this example, a Control of type RootDesignerView is used.
' Any class that inherits from Control will work.
m_view = New RootDesignerView(Me)
End If
Return m_view
End Function
' IRootDesigner.SupportedTechnologies is a required override for an
' IRootDesigner. Default is the view technology used by this designer.
ReadOnly Property SupportedTechnologies() As ViewTechnology() Implements IRootDesigner.SupportedTechnologies
Get
Return New ViewTechnology() {ViewTechnology.Default}
End Get
End Property
' RootDesignerView is a simple control that will be displayed
' in the designer window.
Private Class RootDesignerView
Inherits Control
Private m_designer As SampleRootDesigner
Public Sub New(ByVal designer As SampleRootDesigner)
m_designer = designer
BackColor = Color.Blue
Font = New Font(Font.FontFamily.Name, 24.0F)
End Sub
Protected Overrides Sub OnPaint(ByVal pe As PaintEventArgs)
MyBase.OnPaint(pe)
' Draws the name of the component in large letters.
Dim rf As New RectangleF(ClientRectangle.X, ClientRectangle.Y, ClientRectangle.Width, ClientRectangle.Height)
pe.Graphics.DrawString(m_designer.Component.Site.Name, Font, Brushes.Yellow, rf)
End Sub
End Class
End Class
End Namespace
O exemplo a seguir demonstra como usar a enumeração 'ViewTechnology> em um designer. Este exemplo faz parte de um exemplo maior fornecido para a LocalizationExtenderProvider classe .
#using <system.dll>
#using <system.design.dll>
#using <system.windows.forms.dll>
#using <system.drawing.dll>
using namespace System;
using namespace System::Collections;
using namespace System::ComponentModel;
using namespace System::ComponentModel::Design;
using namespace System::Diagnostics;
using namespace System::Drawing;
using namespace System::Windows::Forms;
using namespace System::Windows::Forms::Design;
// This example demonstrates adding localization support to a component hierarchy from a
// custom IRootDesigner using the LocalizationExtenderProvider class.
namespace LocalizationExtenderProviderExample
{
// Example IRootDesigner implementation demonstrates LocalizationExtenderProvider support.
private ref class SampleRootDesigner: public IRootDesigner
{
private:
// RootDesignerView is a simple control that will be displayed in the designer window.
ref class RootDesignerView: public Control
{
private:
SampleRootDesigner^ m_designer;
IComponent^ comp;
public:
RootDesignerView( SampleRootDesigner^ designer, IComponent^ component )
{
m_designer = designer;
this->comp = component;
BackColor = Color::Blue;
Font = gcnew System::Drawing::Font( FontFamily::GenericMonospace,12 );
}
protected:
// Displays the name of the component and the name of the assembly of the component
// that this root designer is providing support for.
virtual void OnPaint( PaintEventArgs^ pe ) override
{
Control::OnPaint( pe );
if ( m_designer != 0 && comp != 0 )
{
// Draws the name of the component in large letters.
pe->Graphics->DrawString( "Root Designer View", Font, Brushes::Yellow, 8, 4 );
pe->Graphics->DrawString( String::Concat( "Design Name : ", comp->Site->Name ), gcnew System::Drawing::Font( "Arial",10 ), Brushes::Yellow, 8, 28 );
pe->Graphics->DrawString( String::Concat( "Assembly : ", comp->GetType()->AssemblyQualifiedName ), gcnew System::Drawing::Font( "Arial",10 ), Brushes::Yellow, System::Drawing::RectangleF( System::Drawing::Point( 8, 44 ), System::Drawing::Size( ClientRectangle.Width - 8, ClientRectangle.Height - 44 ) ) );
// Uses the site of the component to acquire an ISelectionService and sets the property grid focus to the component.
ISelectionService^ selectionService = dynamic_cast<ISelectionService^>(comp->Site->GetService( typeid<ISelectionService^> ));
if ( selectionService != nullptr )
{
array<IComponent^>^myArray = {m_designer->component};
selectionService->SetSelectedComponents( static_cast<Array^>(myArray) );
}
}
}
};
protected:
// RootDesignerView Control provides a full region designer view for this root designer's associated component.
RootDesignerView^ m_view;
// Stores reference to the LocalizationExtenderProvider this designer adds, in order to remove it on Dispose.
LocalizationExtenderProvider^ extender;
// Internally stores the IDesigner's component reference
IComponent^ component;
// Provides a RootDesignerView object that supports ViewTechnology.WindowsForms.
Object^ GetView( ViewTechnology technology )
{
if ( technology != ViewTechnology::WindowsForms )
{
throw gcnew ArgumentException( "Not a supported view technology", "technology" );
}
if ( m_view == nullptr )
{
// Create the view control. In this example, a Control of type RootDesignerView is used.
// A WindowsForms ViewTechnology view provider requires a class that inherits from Control.
m_view = gcnew RootDesignerView( this,this->Component );
}
return m_view;
}
property array<ViewTechnology>^ SupportedTechnologies
{
// This designer supports the WindowsForms view technology.
array<ViewTechnology>^ IRootDesigner::get()
{
ViewTechnology myArray[] = {ViewTechnology::WindowsForms};
return myArray;
}
}
public:
// Adds a LocalizationExtenderProvider for the component this designer is initialized to support.
void Initialize( IComponent^ component )
{
this->component = component;
// If no extender from this designer is active...
if ( extender == nullptr )
{
// Adds a LocalizationExtenderProvider that provides localization support properties to the specified component.
extender = gcnew LocalizationExtenderProvider( this->component->Site,this->component );
}
}
property DesignerVerbCollection^ Verbs
{
// Empty IDesigner interface property and method implementations
DesignerVerbCollection^ get()
{
return nullptr;
}
}
property IComponent^ Component
{
IComponent^ get()
{
return this->component;
}
}
void DoDefaultAction(){}
void Dispose(){}
protected:
// If a LocalizationExtenderProvider has been added, removes the extender provider.
void Dispose( bool disposing )
{
// If an extender has been added, remove it
if ( extender != nullptr )
{
// Disposes of the extender provider. The extender
// provider removes itself from the extender provider
// service when it is disposed.
extender->Dispose();
extender = nullptr;
}
}
};
// The following attribute associates the RootDesignedComponent with the RootDesignedComponent component.
[Designer(__typeof(SampleRootDesigner),__typeof(IRootDesigner))]
public ref class RootDesignedComponent: public Component
{
public:
RootDesignedComponent(){}
};
// RootViewDesignerComponent is a component associated with the SampleRootDesigner
// IRootDesigner that provides LocalizationExtenderProvider localization support.
// This derived class is included at the top of this example to enable
// easy launching of designer view without having to put the class in its own file.
public ref class RootViewDesignerComponent: public RootDesignedComponent
{
public:
RootViewDesignerComponent(){}
};
}
using System;
using System.Collections;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;
using System.Windows.Forms.Design;
// This example demonstrates adding localization support to a component hierarchy from a
// custom IRootDesigner using the LocalizationExtenderProvider class.
namespace LocalizationExtenderProviderExample
{
// RootViewDesignerComponent is a component associated with the SampleRootDesigner
// IRootDesigner that provides LocalizationExtenderProvider localization support.
// This derived class is included at the top of this example to enable
// easy launching of designer view without having to put the class in its own file.
public class RootViewDesignerComponent : RootDesignedComponent
{
public RootViewDesignerComponent()
{
}
}
// The following attribute associates the RootDesignedComponent with the RootDesignedComponent component.
[Designer(typeof(SampleRootDesigner), typeof(IRootDesigner))]
public class RootDesignedComponent : Component
{
public RootDesignedComponent()
{
}
}
// Example IRootDesigner implementation demonstrates LocalizationExtenderProvider support.
internal class SampleRootDesigner : IRootDesigner
{
// RootDesignerView Control provides a full region designer view for this root designer's associated component.
private RootDesignerView m_view;
// Stores reference to the LocalizationExtenderProvider this designer adds, in order to remove it on Dispose.
private LocalizationExtenderProvider extender;
// Internally stores the IDesigner's component reference
private IComponent component;
// Adds a LocalizationExtenderProvider for the component this designer is initialized to support.
public void Initialize(System.ComponentModel.IComponent component)
{
this.component = component;
// If no extender from this designer is active...
if( extender == null )
{
// Adds a LocalizationExtenderProvider that provides localization support properties to the specified component.
extender = new LocalizationExtenderProvider(this.component.Site, this.component);
}
}
// Provides a RootDesignerView object that supports ViewTechnology.WindowsForms.
object IRootDesigner.GetView(ViewTechnology technology)
{
if (technology != ViewTechnology.WindowsForms)
{
throw new ArgumentException("Not a supported view technology", "technology");
}
if (m_view == null )
{
// Create the view control. In this example, a Control of type RootDesignerView is used.
// A WindowsForms ViewTechnology view provider requires a class that inherits from Control.
m_view = new RootDesignerView(this, this.Component);
}
return m_view;
}
// This designer supports the WindowsForms view technology.
ViewTechnology[] IRootDesigner.SupportedTechnologies
{
get
{
return new ViewTechnology[] {ViewTechnology.WindowsForms};
}
}
// If a LocalizationExtenderProvider has been added, removes the extender provider.
protected void Dispose(bool disposing)
{
// If an extender has been added, remove it
if( extender != null )
{
// Disposes of the extender provider. The extender
// provider removes itself from the extender provider
// service when it is disposed.
extender.Dispose();
extender = null;
}
}
// Empty IDesigner interface property and method implementations
public System.ComponentModel.Design.DesignerVerbCollection Verbs
{
get
{
return null;
}
}
public System.ComponentModel.IComponent Component
{
get
{
return this.component;
}
}
public void DoDefaultAction()
{
}
public void Dispose()
{
}
// RootDesignerView is a simple control that will be displayed in the designer window.
private class RootDesignerView : Control
{
private SampleRootDesigner m_designer;
private IComponent comp;
public RootDesignerView(SampleRootDesigner designer, IComponent component)
{
m_designer = designer;
this.comp = component;
BackColor = Color.Blue;
Font = new Font(FontFamily.GenericMonospace, 12);
}
// Displays the name of the component and the name of the assembly of the component
// that this root designer is providing support for.
protected override void OnPaint(PaintEventArgs pe)
{
base.OnPaint(pe);
if( m_designer != null && comp != null )
{
// Draws the name of the component in large letters.
pe.Graphics.DrawString("Root Designer View", Font, Brushes.Yellow, 8, 4);
pe.Graphics.DrawString("Design Name : "+comp.Site.Name, new Font("Arial", 10), Brushes.Yellow, 8, 28);
pe.Graphics.DrawString("Assembly : "+comp.GetType().AssemblyQualifiedName, new Font("Arial", 10), Brushes.Yellow, new Rectangle(new Point(8, 44), new Size(ClientRectangle.Width-8, ClientRectangle.Height-44)));
// Uses the site of the component to acquire an ISelectionService and sets the property grid focus to the component.
ISelectionService selectionService = (ISelectionService)comp.Site.GetService(typeof(ISelectionService));
if( selectionService != null )
selectionService.SetSelectedComponents( new IComponent[] { m_designer.component } );
}
}
}
}
}
Imports System.Collections
Imports System.ComponentModel
Imports System.ComponentModel.Design
Imports System.Diagnostics
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Windows.Forms.Design
' This example demonstrates adding localization support to a component hierarchy from a
' custom IRootDesigner using the LocalizationExtenderProvider class.
' RootViewDesignerComponent is a component associated with the SampleRootDesigner
' IRootDesigner that provides LocalizationExtenderProvider localization support.
' This derived class is included at the top of this example to enable
' easy launching of designer view without having to put the class in its own file.
Public Class RootViewDesignerComponent
Inherits RootDesignedComponent
Public Sub New()
End Sub
End Class
' The following attribute associates the RootDesignedComponent with the RootDesignedComponent component.
<Designer(GetType(SampleRootDesigner), GetType(IRootDesigner))> _
Public Class RootDesignedComponent
Inherits Component
Public Sub New()
End Sub
End Class
' Example IRootDesigner implementation demonstrates LocalizationExtenderProvider support.
Friend Class SampleRootDesigner
Implements IRootDesigner
' RootDesignerView Control provides a full region designer view for this root designer's associated component.
Private m_view As RootDesignerView
' Stores reference to the LocalizationExtenderProvider this designer adds, in order to remove it on Dispose.
Private extender As LocalizationExtenderProvider
' Internally stores the IDesigner's component reference
Private component_ As IComponent
' Adds a LocalizationExtenderProvider for the component this designer is initialized to support.
Public Sub Initialize(ByVal component As System.ComponentModel.IComponent) Implements IRootDesigner.Initialize
Me.component_ = component
' If no extender from this designer is active...
If extender Is Nothing Then
' Adds a LocalizationExtenderProvider that provides localization support properties to the specified component.
extender = New LocalizationExtenderProvider(Me.component_.Site, Me.component_)
End If
End Sub
' Provides a RootDesignerView object that supports ViewTechnology.WindowsForms.
Function GetView(ByVal technology As ViewTechnology) As Object Implements IRootDesigner.GetView
If technology <> ViewTechnology.WindowsForms Then
Throw New ArgumentException("Not a supported view technology", "technology")
End If
If m_view Is Nothing Then
' Create the view control. In this example, a Control of type RootDesignerView is used.
' A WindowsForms ViewTechnology view provider requires a class that inherits from Control.
m_view = New RootDesignerView(Me, Me.Component)
End If
Return m_view
End Function
' This designer supports the WindowsForms view technology.
ReadOnly Property SupportedTechnologies() As ViewTechnology() Implements IRootDesigner.SupportedTechnologies
Get
Return New ViewTechnology() {ViewTechnology.WindowsForms}
End Get
End Property
' If a LocalizationExtenderProvider has been added, removes the extender provider.
Protected Overloads Sub Dispose(ByVal disposing As Boolean)
' If an extender has been added, remove it
If (extender IsNot Nothing) Then
' Disposes of the extender provider. The extender
' provider removes itself from the extender provider
' service when it is disposed.
extender.Dispose()
extender = Nothing
End If
End Sub
' Empty IDesigner interface property and method implementations
Public ReadOnly Property Verbs() As System.ComponentModel.Design.DesignerVerbCollection Implements IDesigner.Verbs
Get
Return Nothing
End Get
End Property
Public ReadOnly Property Component() As System.ComponentModel.IComponent Implements IRootDesigner.Component
Get
Return Me.component_
End Get
End Property
Public Sub DoDefaultAction() Implements IDesigner.DoDefaultAction
End Sub
Public Overloads Sub Dispose() Implements IDisposable.Dispose
End Sub
' RootDesignerView is a simple control that will be displayed in the designer window.
Private Class RootDesignerView
Inherits Control
Private m_designer As SampleRootDesigner
Private comp As IComponent
Public Sub New(ByVal designer As SampleRootDesigner, ByVal component As IComponent)
m_designer = designer
Me.comp = component
BackColor = Color.Blue
Font = New Font(FontFamily.GenericMonospace, 12)
End Sub
' Displays the name of the component and the name of the assembly of the component
' that this root designer is providing support for.
Protected Overrides Sub OnPaint(ByVal pe As PaintEventArgs)
MyBase.OnPaint(pe)
If (m_designer IsNot Nothing) AndAlso (comp IsNot Nothing) Then
' Draws the name of the component in large letters.
pe.Graphics.DrawString("Root Designer View", Font, Brushes.Yellow, 8, 4)
pe.Graphics.DrawString("Design Name : " + comp.Site.Name, New Font("Arial", 10), Brushes.Yellow, 8, 28)
' Uses the site of the component to acquire an ISelectionService and sets the property grid focus to the component.
Dim selectionService As ISelectionService = CType(comp.Site.GetService(GetType(ISelectionService)), ISelectionService)
If (selectionService IsNot Nothing) Then
selectionService.SetSelectedComponents(New IComponent() {m_designer.Component})
End If
End If
End Sub
End Class
End Class
Comentários
O modelo do adaptador de exibição substitui e adiciona funcionalidade ao ViewTechnology recurso; no entanto, o ViewTechnology recurso é retido para compatibilidade com versões anteriores e uso futuro, se você escolher.
ViewTechnology define identificadores que podem indicar o modo a ser usado para controlar a exibição de um documento hospedado pelo designer.
Você só deve usar o Default valor em seu ambiente de hospedagem de designer. Nas versões anteriores do .NET Framework, a ViewTechnology enumeração especificava o tipo de modelo de interface do usuário compatível com um designer raiz. Como esse modelo não é extensível, você deve usar um modelo de adaptador de exibição . Um adaptador de exibição é um tipo que adapta um objeto de um tipo para outro.
Por exemplo, um designer HTML pode retornar uma DemoDOM árvore como sua exibição. O designer HTML retorna uma tecnologia de exibição de Default. Uma Windows Forms ambiente de hospedagem teria uma ou mais classes de adaptador de exibição disponíveis. Se uma dessas classes puder converter o DemoDOM em um controle Windows Forms, o aplicativo de hospedagem poderá dar suporte a esse tipo de designer. Se nenhum adaptador puder lidar com o tipo de dados retornado do método do GetView designer, a carga do designer falhará e o usuário receberá um erro.
O Visual Studio tem um esquema extensível para fornecer adaptadores de exibição, para que ele possa se adaptar a qualquer tecnologia de interface do usuário. Provedores de tecnologia de terceiros também podem oferecer um adaptador de exibição apropriado e seus modelos de objeto são imediatamente consumíveis.
Aplica-se a
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