StructuredCompositeActivityDesigner.ContainedDesigners 属性

定义

获取一个泛型只读集合,其中包含作为 StructuredCompositeActivityDesigner 的子级的所有活动设计器。

public:
 virtual property System::Collections::ObjectModel::ReadOnlyCollection<System::Workflow::ComponentModel::Design::ActivityDesigner ^> ^ ContainedDesigners { System::Collections::ObjectModel::ReadOnlyCollection<System::Workflow::ComponentModel::Design::ActivityDesigner ^> ^ get(); };
public override System.Collections.ObjectModel.ReadOnlyCollection<System.Workflow.ComponentModel.Design.ActivityDesigner> ContainedDesigners { get; }
member this.ContainedDesigners : System.Collections.ObjectModel.ReadOnlyCollection<System.Workflow.ComponentModel.Design.ActivityDesigner>
Public Overrides ReadOnly Property ContainedDesigners As ReadOnlyCollection(Of ActivityDesigner)

属性值

包含子设计器的 ActivityDesigner 只读集合。

示例

下面的示例演示如何使用 CompositeActivityDesigner 类的基于设计器的中断来添加新的分支。 如果 CanInsertActivities 返回 true,则使用 InsertActivities 方法创建一个新分支。 创建 ConnectorHitTestInfo 对象作为 InsertActivities 方法的参数。 创建完成后,使用 EnsureVisibleContainedDesigner 方法确保可以通过访问 ContainedDesigners 集合中的单个对象在工作流设计器中显示新添加的分支。

protected override CompositeActivity OnCreateNewBranch()
{
    return new ParallelIfBranch();
}

private void OnAddBranch(object sender, EventArgs e)
{
    CompositeActivity activity1 = this.OnCreateNewBranch();
    CompositeActivity activity2 = base.Activity as CompositeActivity;

    if ((activity2 != null) && (activity1 != null))
    {
        int num1 = this.ContainedDesigners.Count;
        Activity[] activityArray1 = new Activity[] { activity1 };

        if (CanInsertActivities(new ConnectorHitTestInfo(this, HitTestLocations.Designer, activity2.Activities.Count),
            new List<Activity>(activityArray1).AsReadOnly()))
        {
            CompositeActivityDesigner.InsertActivities(this,
                new ConnectorHitTestInfo(this, HitTestLocations.Designer, activity2.Activities.Count),
                new List<Activity>(activityArray1).AsReadOnly(),
                string.Format("Adding branch {0}", activity1.GetType().Name));

            if ((this.ContainedDesigners.Count > num1) && (this.ContainedDesigners.Count > 0))
            {
                this.ContainedDesigners[this.ContainedDesigners.Count - 1].EnsureVisible();
            }
        }
    }
}
Protected Overrides Function OnCreateNewBranch() As CompositeActivity
    Return New ParallelIfBranch()
End Function

Private Sub OnAddBranch(ByVal sender As Object, ByVal e As EventArgs)
    Dim activity1 As CompositeActivity = Me.OnCreateNewBranch()
    Dim activity2 As CompositeActivity = CType(MyBase.Activity, CompositeActivity)

    If (activity2 IsNot Nothing) And (activity1 IsNot Nothing) Then

        Dim num1 As Integer = Me.ContainedDesigners.Count
        Dim activityArray1() As Activity = {activity1}

        If (CanInsertActivities(New ConnectorHitTestInfo(Me, HitTestLocations.Designer, activity2.Activities.Count), _
            New List(Of Activity)(activityArray1).AsReadOnly())) Then

            CompositeActivityDesigner.InsertActivities(Me, _
                New ConnectorHitTestInfo(Me, HitTestLocations.Designer, activity2.Activities.Count), _
                New List(Of Activity)(activityArray1).AsReadOnly(), _
                String.Format("Adding branch 0}", activity1.GetType().Name))

            If (Me.ContainedDesigners.Count > num1) And (Me.ContainedDesigners.Count > 0) Then
                Me.ContainedDesigners(Me.ContainedDesigners.Count - 1).EnsureVisible()
            End If
        End If
    End If
End Sub

适用于