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FreeformActivityDesigner.AddConnector 方法

定義

將接點加入至 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

參數

source
ConnectionPoint

要開始描繪接點的 ConnectionPoint 位置。

target
ConnectionPoint

要完成描繪接點的 ConnectionPoint 位置。

傳回

Connector

已加入至 ConnectorFreeformActivityDesigner

例外狀況

sourcetarget 包含 null 參考 (在 Visual Basic 中為 Nothing)。

AssociatedDesignersourcetarget 屬性包含 null 參考 (Nothing)。

目前的 FreeformActivityDesigner 不是要加入接點的容器。

範例

下列程式碼範例示範如何在自訂活動設計工具的 AddConnector 方法中使用 OnLayoutPosition 方法。

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

備註

當使用者將 AddConnector 加入至 Connector 時,會呼叫 FreeformActivityDesigner

適用於