ViewTechnology Wyliczenie
Definicja
Ważne
Niektóre informacje odnoszą się do produktu w wersji wstępnej, który może zostać znacząco zmodyfikowany przed wydaniem. Firma Microsoft nie udziela żadnych gwarancji, jawnych lub domniemanych, w odniesieniu do informacji podanych w tym miejscu.
Definiuje identyfikatory zestawu technologii obsługujących projektanta.
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- Dziedziczenie
- Atrybuty
Pola
| Default | 2 | Określa obsługę technologii widoku domyślnego. Projektant główny może zwrócić dowolny typ obiektu, ale obiekt musi być zgodny z adapterem dla technologii hosta. Środowiska hostingu, takie jak Visual Studio, umożliwiają podłączanie nowych kart technologicznych widoku. Domyślnym obiektem widoku projektanta Windows Forms jest wystąpienie.Control |
| Passthrough | 0 | Reprezentuje tryb, w którym obiekt widoku jest przekazywany bezpośrednio do środowiska deweloperskiego. Obiekt widoku musi implementować wszystkie interfejsy wymagane przez środowisko programistyczne. Środowisko programistyczne programu Visual Studio obsługuje obiekty widoku, które są kontrolką ActiveX, aktywnym dokumentem lub obiektem implementujący |
| WindowsForms | 1 | Reprezentuje tryb, w którym obiekt kontrolki Windows Forms zapewnia wyświetlanie projektanta głównego. Host projektanta wypełnia okno dokumentu środowiska deweloperskiego kontrolką Windows Forms. |
Przykłady
W poniższym przykładzie pokazano, jak używać ViewTechnology.Default w projektancie. Ten przykład jest częścią większego przykładu udostępnionego dla interfejsu GetView .
#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
W poniższym przykładzie pokazano, jak używać wyliczenia "ViewTechnology> w projektancie". Ten przykład jest częścią większego przykładu udostępnionego LocalizationExtenderProvider dla klasy.
#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
Uwagi
Model karty widoku zastępuje i dodaje funkcje do ViewTechnology funkcji. ViewTechnology Jednak funkcja jest zachowywana zarówno w celu zapewnienia zgodności z poprzednimi wersjami, jak i użycia w przyszłości, jeśli wybierzesz.
ViewTechnology definiuje identyfikatory, które mogą wskazywać tryb używany do kontrolowania wyświetlania dokumentu hostowanego przez projektanta.
Należy użyć Default tylko wartości w środowisku hostingu projektanta. W poprzednich wersjach .NET Framework wyliczenie ViewTechnology określiło typ modelu interfejsu użytkownika obsługiwanego przez projektanta głównego. Ponieważ ten model nie jest rozszerzalny, należy zamiast tego użyć modelu karty widoku . Adapter widoku jest typem, który dostosowuje obiekt jednego typu do innego.
Na przykład projektant HTML może zwrócić DemoDOM drzewo jako widok. Projektant HTML zwraca technologię widoku .Default Środowisko hostingu Windows Forms zawierałoby co najmniej jedną klasę kart widokowych. Jeśli jedna z takich klas może przekształcić DemoDOM obiekt w kontrolkę Windows Forms, aplikacja hostingowa może obsługiwać tego typu projektanta. Jeśli żadna karta nie może obsłużyć typu danych zwróconego z metody projektanta GetView , obciążenie projektanta zakończy się niepowodzeniem, a użytkownik zostanie wyświetlony z powodu błędu.
Program Visual Studio ma rozszerzalny schemat udostępniania kart widokowych, dzięki czemu może dostosować się do dowolnej technologii interfejsu użytkownika. Dostawcy technologii innych firm mogą również oferować odpowiednią kartę widokową, a ich modele obiektów są natychmiast używane.
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