ActivityToolboxItem.CreateComponentsCore(IDesignerHost) Método

Definição

Namespace:

System.Workflow.ComponentModel.Design

Assembly:

System.Workflow.ComponentModel.dll

Cria um componente Activity ou uma matriz de componentes Activity quando o item de caixa de ferramentas é invocado.

protected:
 override cli::array <System::ComponentModel::IComponent ^> ^ CreateComponentsCore(System::ComponentModel::Design::IDesignerHost ^ host);

protected override System.ComponentModel.IComponent[] CreateComponentsCore (System.ComponentModel.Design.IDesignerHost host);

override this.CreateComponentsCore : System.ComponentModel.Design.IDesignerHost -> System.ComponentModel.IComponent[]

Protected Overrides Function CreateComponentsCore (host As IDesignerHost) As IComponent()

Parâmetros

host

IDesignerHost

O IDesignerHost para hospedar o item de caixa de ferramentas.

Retornos

IComponent[]

Uma matriz de objetos IComponent criados.

Exemplos

O exemplo a seguir mostra uma classe completa ActivityToolboxItem para uma atividade personalizada. Neste exemplo, o CreateComponentsCore método é substituído para inserir duas atividades personalizadas em um ParallelActivity.

[Serializable]
internal sealed class CustomActivityToolboxItem : ActivityToolboxItem
{
    public CustomActivityToolboxItem(Type type)
        : base(type)
    {
    }

    private CustomActivityToolboxItem(SerializationInfo info, StreamingContext context)
    {
        Deserialize(info, context);
    }

    protected override IComponent[] CreateComponentsCore(IDesignerHost designerHost)
    {
        CompositeActivity parallel = new ParallelActivity();
        parallel.Activities.Add(new CustomActivity());
        parallel.Activities.Add(new CustomActivity());

        return new IComponent[] { parallel };
    }
}

<Serializable()> _
Friend Class CustomActivityToolboxItem
    Inherits ActivityToolboxItem

    Public Sub New(ByVal type As Type)
        MyBase.new(type)
    End Sub

    Private Sub New(ByVal info As SerializationInfo, ByVal context As StreamingContext)
        Deserialize(info, context)
    End Sub

    Protected Overrides Function CreateComponentsCore(ByVal designerHost As IDesignerHost) As IComponent()
        Dim parallel As New ParallelActivity()
        parallel.Activities.Add(New CustomActivity())
        parallel.Activities.Add(New CustomActivity())

        Return New IComponent() {parallel}
    End Function
End Class

Comentários

O CreateComponentsCore método retorna o componente ou os componentes que o ActivityToolboxItem cria.