ComponentDesigner.GetService(Type) Метод

Определение

Пространство имен:

System.ComponentModel.Design

Сборка:

System.Windows.Forms.Design.dll

Исходный код:

ComponentDesigner.cs

Пытается получить указанный тип службы из сайта режима конструктора компонента конструктора.

protected:
 virtual System::Object ^ GetService(Type ^ serviceType);

protected virtual object? GetService(Type serviceType);

abstract member GetService : Type -> obj
override this.GetService : Type -> obj

Protected Overridable Function GetService (serviceType As Type) As Object

Параметры

serviceType

Type

Тип запрашиваемой службы.

Возвращаемое значение

Object

Объект, реализующий запрошенную службу, или null если служба не может быть разрешена.

Примеры

В следующем примере кода показано использование GetService метода для доступа к службам конструктора.

// This utility method connects the designer to various
// services it will use. 
void InitializeServices()
{
    // Acquire a reference to DesignerActionService.
    actionService =
        GetService(typeof(DesignerActionService))
        as DesignerActionService;

    // Acquire a reference to DesignerActionUIService.
    actionUiService =
        GetService(typeof(DesignerActionUIService))
        as DesignerActionUIService;

    // Acquire a reference to IComponentChangeService.
    changeService =
        GetService(typeof(IComponentChangeService))
        as IComponentChangeService;

    // Hook the IComponentChangeService events.
    if (changeService != null)
    {
        changeService.ComponentChanged +=

            ChangeService_ComponentChanged;

        changeService.ComponentAdded +=

            ChangeService_ComponentAdded;

        changeService.ComponentRemoved +=

            changeService_ComponentRemoved;
    }

    // Acquire a reference to ISelectionService.
    selectionService =
        GetService(typeof(ISelectionService))
        as ISelectionService;

    // Hook the SelectionChanged event.
    if (selectionService != null)
    {
        selectionService.SelectionChanged +=
             selectionService_SelectionChanged;
    }

    // Acquire a reference to IDesignerEventService.
    eventService =
        GetService(typeof(IDesignerEventService))
        as IDesignerEventService;

    if (eventService != null)
    {
        eventService.ActiveDesignerChanged +=

            eventService_ActiveDesignerChanged;
    }

    // Acquire a reference to IDesignerHost.
    host =
        GetService(typeof(IDesignerHost))
        as IDesignerHost;

    // Acquire a reference to IDesignerOptionService.
    optionService =
        GetService(typeof(IDesignerOptionService))
        as IDesignerOptionService;

    // Acquire a reference to IEventBindingService.
    eventBindingService =
        GetService(typeof(IEventBindingService))
        as IEventBindingService;

    // Acquire a reference to IExtenderListService.
    listService =
        GetService(typeof(IExtenderListService))
        as IExtenderListService;

    // Acquire a reference to IReferenceService.
    referenceService =
        GetService(typeof(IReferenceService))
        as IReferenceService;

    // Acquire a reference to ITypeResolutionService.
    typeResService =
        GetService(typeof(ITypeResolutionService))
        as ITypeResolutionService;

    // Acquire a reference to IComponentDiscoveryService.
    componentDiscoveryService =
        GetService(typeof(IComponentDiscoveryService))
        as IComponentDiscoveryService;

    // Acquire a reference to IToolboxService.
    toolboxService =
        GetService(typeof(IToolboxService))
        as IToolboxService;

    // Acquire a reference to UndoEngine.
    undoEng =
        GetService(typeof(UndoEngine))
        as UndoEngine;

    if (undoEng != null)
    {
        _ = MessageBox.Show("UndoEngine");
    }
}

' This utility method connects the designer to various
' services it will use. 
Private Sub InitializeServices()

    ' Acquire a reference to DesignerActionService.
    Me.actionService = GetService(GetType(DesignerActionService))

    ' Acquire a reference to DesignerActionUIService.
    Me.actionUiService = GetService(GetType(DesignerActionUIService))

    ' Acquire a reference to IComponentChangeService.
    Me.changeService = GetService(GetType(IComponentChangeService))

    ' Hook the IComponentChangeService events.
    If (Me.changeService IsNot Nothing) Then
        AddHandler Me.changeService.ComponentChanged, AddressOf ChangeService_ComponentChanged

        AddHandler Me.changeService.ComponentAdded, AddressOf ChangeService_ComponentAdded

        AddHandler Me.changeService.ComponentRemoved, AddressOf changeService_ComponentRemoved
    End If

    ' Acquire a reference to ISelectionService.
    Me.selectionService = GetService(GetType(ISelectionService))

    ' Hook the SelectionChanged event.
    If (Me.selectionService IsNot Nothing) Then
        AddHandler Me.selectionService.SelectionChanged, AddressOf selectionService_SelectionChanged
    End If

    ' Acquire a reference to IDesignerEventService.
    Me.eventService = GetService(GetType(IDesignerEventService))

    If (Me.eventService IsNot Nothing) Then
        AddHandler Me.eventService.ActiveDesignerChanged, AddressOf eventService_ActiveDesignerChanged
    End If

    ' Acquire a reference to IDesignerHost.
    Me.host = GetService(GetType(IDesignerHost))

    ' Acquire a reference to IDesignerOptionService.
    Me.optionService = GetService(GetType(IDesignerOptionService))

    ' Acquire a reference to IEventBindingService.
    Me.eventBindingService = GetService(GetType(IEventBindingService))

    ' Acquire a reference to IExtenderListService.
    Me.listService = GetService(GetType(IExtenderListService))

    ' Acquire a reference to IReferenceService.
    Me.referenceService = GetService(GetType(IReferenceService))

    ' Acquire a reference to ITypeResolutionService.
    Me.typeResService = GetService(GetType(ITypeResolutionService))

    ' Acquire a reference to IComponentDiscoveryService.
    Me.componentDiscoveryService = GetService(GetType(IComponentDiscoveryService))

    ' Acquire a reference to IToolboxService.
    Me.toolboxService = GetService(GetType(IToolboxService))

    ' Acquire a reference to UndoEngine.
    Me.undoEng = GetService(GetType(UndoEngine))

    If (Me.undoEng IsNot Nothing) Then
        MessageBox.Show("UndoEngine")
    End If
End Sub

Комментарии

Реализация этого метода по умолчанию запрашивает службу с сайта компонента.