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FreeformActivityDesigner.AddConnector Metoda

Definice

Přidá konektor do .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

Parametry

source
ConnectionPoint

Umístění ConnectionPoint pro zahájení kreslení spojnice

target
ConnectionPoint

Umístění ConnectionPoint pro dokončení kreslení spojnice

Návraty

Connector

To Connector bylo přidáno do .FreeformActivityDesigner

Výjimky

sourcenebo target obsahuje null odkaz (Nothing v Visual Basic).

Vlastnost AssociatedDesigner nebo source target obsahuje null odkaz (Nothing).

Aktuální FreeformActivityDesigner není kontejner pro přidání konektoru.

Příklady

Následující příklad ukazuje, jak použít metodu AddConnector ve vlastní metodě návrháře OnLayoutPosition aktivit.

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

Poznámky

AddConnectorje volána, když uživatel přidá Connector do .FreeformActivityDesigner

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