MenuAction.Enabled 속성

아티클
08/10/2011

사용자가 메뉴 작업 항목을 사용할 수 있는지 여부를 나타내는 값을 가져오거나 설정합니다.

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

구문

‘선언
Public Property Enabled As Boolean
    Get
    Set

public bool Enabled { get; set; }

public:
property bool Enabled {
    bool get ();
    void set (bool value);
}

member Enabled : bool with get, set

function get Enabled () : boolean
function set Enabled (value : boolean)

속성 값

형식: System.Boolean
사용자가 메뉴 작업 항목을 사용할 수 있으면 true이고, 그렇지 않으면 false입니다.기본값은 true입니다.

설명

Enabled 및 Visible 속성이 true이면 디자이너에서 Command에 대해 Execute 메서드를 호출합니다.

예제

다음 코드 예제에서는 컨트롤의 Background 속성 값에 따라 두 MenuAction 항목을 설정하는 방법을 보여 줍니다. 자세한 내용은 연습: 메뉴 공급자 만들기을 참조하십시오.

' The following method handles the UpdateItemStatus event.
' It sets the MenuAction states according to the state
' of the control's Background property. This method is
' called before the context menu is shown.
Sub CustomContextMenuProvider_UpdateItemStatus( _
    ByVal sender As Object, _
    ByVal e As MenuActionEventArgs)

    ' Turn everything on, and then based on the value 
    ' of the BackgroundProperty, selectively turn some off.
    clearBackgroundMenuAction.Checked = False
    clearBackgroundMenuAction.Enabled = True
    setBackgroundToBlueMenuAction.Checked = False
    setBackgroundToBlueMenuAction.Enabled = True

    ' Get a ModelItem which represents the selected control. 
    Dim selectedControl As ModelItem = _
        e.Selection.PrimarySelection

    ' Get the value of the Background property from the ModelItem.
    Dim backgroundProperty As ModelProperty = _
        selectedControl.Properties("Background")

    ' Set the MenuAction items appropriately.
    If Not backgroundProperty.IsSet Then
        clearBackgroundMenuAction.Checked = True
        clearBackgroundMenuAction.Enabled = False
    ElseIf backgroundProperty.ComputedValue.Equals(Brushes.Blue) Then
        setBackgroundToBlueMenuAction.Checked = True
        setBackgroundToBlueMenuAction.Enabled = False
    End If

End Sub

// The following method handles the UpdateItemStatus event.
// It sets the MenuAction states according to the state
// of the control's Background property. This method is
// called before the context menu is shown.
void CustomContextMenuProvider_UpdateItemStatus(
    object sender, 
    MenuActionEventArgs e)
{
    // Turn everything on, and then based on the value 
    // of the BackgroundProperty, selectively turn some off.
    clearBackgroundMenuAction.Checked = false;
    clearBackgroundMenuAction.Enabled = true;
    setBackgroundToBlueMenuAction.Checked = false;
    setBackgroundToBlueMenuAction.Enabled = true;

    // Get a ModelItem which represents the selected control. 
    ModelItem selectedControl = e.Selection.PrimarySelection;

    // Get the value of the Background property from the ModelItem.
    ModelProperty backgroundProperty = 
        selectedControl.Properties["Background"];

    // Set the MenuAction items appropriately.
    if (!backgroundProperty.IsSet)
    {
        clearBackgroundMenuAction.Checked = true;
        clearBackgroundMenuAction.Enabled = false;
    }
    else if (backgroundProperty.ComputedValue == Brushes.Blue)
    {
        setBackgroundToBlueMenuAction.Checked = true;
        setBackgroundToBlueMenuAction.Enabled = false;
    }
}