FreeformActivityDesigner.AddConnector Méthode

Référence

Définition

Espace de noms:: System.Workflow.ComponentModel.Design

Assembly:: System.Workflow.ComponentModel.dll

Important

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Ajoute un connecteur au FreeformActivityDesigner.

public:
 System::Workflow::ComponentModel::Design::Connector ^ AddConnector(System::Workflow::ComponentModel::Design::ConnectionPoint ^ source, System::Workflow::ComponentModel::Design::ConnectionPoint ^ target);

public System.Workflow.ComponentModel.Design.Connector AddConnector (System.Workflow.ComponentModel.Design.ConnectionPoint source, System.Workflow.ComponentModel.Design.ConnectionPoint target);

member this.AddConnector : System.Workflow.ComponentModel.Design.ConnectionPoint * System.Workflow.ComponentModel.Design.ConnectionPoint -> System.Workflow.ComponentModel.Design.Connector

Public Function AddConnector (source As ConnectionPoint, target As ConnectionPoint) As Connector

Paramètres

source: ConnectionPoint

Emplacement ConnectionPoint où commencer le dessin du connecteur.

target: ConnectionPoint

Emplacement ConnectionPoint où terminer le dessin du connecteur.

Retours

Connector

Connector qui a été ajouté au FreeformActivityDesigner.

Exceptions

ArgumentNullException

source ou target contient une référence null (Nothing en Visual Basic).

ArgumentException

La propriété AssociatedDesigner pour source ou target contient une référence null (Nothing).

InvalidOperationException

Le FreeformActivityDesigner actuel n'est pas le conteneur du connecteur à ajouter.

Exemples

L'exemple suivant indique comment utiliser la méthode AddConnector dans la méthode OnLayoutPosition d'un concepteur d'activités personnalisé.

class ProcessActvityDesigner : FreeformActivityDesigner
{
    private ConnectionPoint GetConnectionPoint(Activity activity, Int32 connectorIndex, DesignerEdges edge)
    {
        ActivityDesigner designer = null;

        if (activity != null && activity.Site != null)
        {
            IDesignerHost designerHost = activity.Site.GetService(typeof(IDesignerHost)) as IDesignerHost;
            if (designerHost != null)
                designer = designerHost.GetDesigner(activity) as ActivityDesigner;
        }
        return new ConnectionPoint(designer, edge, connectorIndex);
    }

    protected override void OnLayoutPosition(ActivityDesignerLayoutEventArgs e)
    {
        base.OnLayoutPosition(e);

        // Draw a connector between the first and second activities contained in
        // the sequence activity used by this designer
        if (this.IsRootDesigner)
        {
            CompositeActivity parentActivity = (CompositeActivity)this.Activity;
            ConnectionPoint sourcePoint = GetConnectionPoint(parentActivity.Activities[0], 1, DesignerEdges.Bottom);
            ConnectionPoint targetPoint = GetConnectionPoint(parentActivity.Activities[1], 0, DesignerEdges.Top);

            this.AddConnector(sourcePoint, targetPoint);
        }
    }

Class ProcessActvityDesigner
    Inherits System.Workflow.ComponentModel.Design.FreeformActivityDesigner


    Function GetConnectionPoint(ByVal activity As Activity, ByVal connectorIndex As Int32, ByVal edge As DesignerEdges) As ConnectionPoint

        Dim designer As ActivityDesigner = Nothing

        If Activity IsNot Nothing And Activity.Site IsNot Nothing Then

            Dim designerHost As IDesignerHost = activity.Site.GetService(GetType(IDesignerHost))
            If designerHost IsNot Nothing Then
                designer = CType(designerHost.GetDesigner(activity), ActivityDesigner)
            End If
        End If

        Return New ConnectionPoint(designer, edge, connectorIndex)
    End Function


    Protected Overrides Sub OnLayoutPosition(ByVal e As ActivityDesignerLayoutEventArgs)

        MyBase.OnLayoutPosition(e)

        ' Draw a connector between the first and second activities contained in 
        ' the sequence activity used by me designer
        If Me.IsRootDesigner Then

            Dim parentActivity As CompositeActivity = CType(Me.Activity, CompositeActivity)
            Dim sourcePoint As ConnectionPoint = GetConnectionPoint(parentActivity.Activities(0), 1, DesignerEdges.Bottom)
            Dim targetPoint As ConnectionPoint = GetConnectionPoint(parentActivity.Activities(1), 0, DesignerEdges.Top)

            Me.AddConnector(sourcePoint, targetPoint)
        End If
    End Sub

End Class

Remarques

AddConnector est appelé lorsqu'un utilisateur ajoute un Connector au FreeformActivityDesigner.

S’applique à

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