ComponentDesigner.GetService(Type) Metode

Definisi

Ruang nama:

System.ComponentModel.Design

Rakitan:

System.Windows.Forms.Design.dll

Upaya untuk mengambil jenis layanan yang ditentukan dari situs mode desain komponen perancang.

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

Parameter

serviceType

Type

Jenis layanan yang akan diminta.

Mengembalikan

Object

Objek yang menerapkan layanan yang diminta, atau null jika layanan tidak dapat diselesaikan.

Contoh

Contoh kode berikut menunjukkan penggunaan GetService metode untuk mengakses layanan perancang.

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

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

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

    // Hook the IComponentChangeService events.
    if (this.changeService != null)
    {
        this.changeService.ComponentChanged +=
            new ComponentChangedEventHandler(
            ChangeService_ComponentChanged);

        this.changeService.ComponentAdded +=
            new ComponentEventHandler(
            ChangeService_ComponentAdded);

        this.changeService.ComponentRemoved +=
            new ComponentEventHandler(
            changeService_ComponentRemoved);
    }

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

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

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

    if (this.eventService != null)
    {
        this.eventService.ActiveDesignerChanged +=
            new ActiveDesignerEventHandler(
            eventService_ActiveDesignerChanged);
    }

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

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

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

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

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

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

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

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

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

    if (this.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

Keterangan

Implementasi default metode ini meminta layanan dari situs komponen.

Lihat juga

• Cara: Mengakses Layanan Waktu Desain