PrimarySelectionPolicy.GetPolicyItems 메서드

아티클
08/10/2011

기본 선택 내용을 나타내는 정책 항목을 반환합니다.

네임스페이스: Microsoft.Windows.Design.Policies
어셈블리: Microsoft.Windows.Design.Interaction(Microsoft.Windows.Design.Interaction.dll)

구문

‘선언
Protected Overrides Function GetPolicyItems ( _
    selection As Selection _
) As IEnumerable(Of ModelItem)

protected override IEnumerable<ModelItem> GetPolicyItems(
    Selection selection
)

protected:
virtual IEnumerable<ModelItem^>^ GetPolicyItems(
    Selection^ selection
) override

abstract GetPolicyItems : 
        selection:Selection -> IEnumerable<ModelItem> 
override GetPolicyItems : 
        selection:Selection -> IEnumerable<ModelItem>

protected override function GetPolicyItems(
    selection : Selection
) : IEnumerable<ModelItem>

매개 변수

selection
형식: Microsoft.Windows.Design.Interaction.Selection
현재 선택 내용입니다.

반환 값

형식: System.Collections.Generic.IEnumerable<ModelItem>
기본 선택 내용이거나 빈 열거형인 단일 요소입니다.

예제

다음 코드 예제에서는 IsSurrogate 속성 및 GetSurrogateItems 메서드를 구현하여 사용자 지정 서로게이트 정책을 만드는 방법을 보여 줍니다. 전체 코드 목록을 보려면 방법: 서로게이트 정책 만들기을 참조하십시오.

' The DockPanelPolicy class implements a surrogate policy that
' provides container semantics for a selected item. By using 
' this policy, the DemoDockPanel container control offers 
' additional tasks and adorners on its children. 
Class DockPanelPolicy
    Inherits PrimarySelectionPolicy

    Public Overrides ReadOnly Property IsSurrogate() As Boolean 
        Get
            Return True
        End Get
    End Property

    Public Overrides Function GetSurrogateItems( _
        ByVal item As Microsoft.Windows.Design.Model.ModelItem) _
        As System.Collections.Generic.IEnumerable( _
        Of Microsoft.Windows.Design.Model.ModelItem)

        Dim parent As ModelItem = item.Parent

        Dim e As New System.Collections.Generic.List(Of ModelItem)

        If (parent IsNot Nothing) Then

            e.Add(parent)

        End If

        Return e

    End Function

End Class

// The DockPanelPolicy class implements a surrogate policy that
// provides container semantics for a selected item. By using 
// this policy, the DemoDockPanel container control offers 
// additional tasks and adorners on its children. 
class DockPanelPolicy : PrimarySelectionPolicy 
{
    public override bool IsSurrogate 
    {
        get 
        { 
            return true;
        }
    }

    public override IEnumerable<ModelItem> GetSurrogateItems(ModelItem item) 
    {
        ModelItem parent = item.Parent;

        if (parent != null)
        {
            yield return parent;
        }
    }
}