Panel.ZIndex Proprietà associata

Definizione

Spazio dei nomi:

System.Windows.Controls

Assembly:

PresentationFramework.dll

Recupera o imposta un valore che rappresenta l'ordine di visualizzazione di un elemento nel piano z.

see GetZIndex, and SetZIndex

see GetZIndex, and SetZIndex

see GetZIndex, and SetZIndex

Esempio

L'esempio seguente illustra come impostare il valore della ZIndex proprietà usando Extensible Application Markup Language (XAML) e il codice .

// Create the application's main window
mainWindow = gcnew Window();
mainWindow->Title = "Canvas ZIndex Sample";

// Create the Canvas
myCanvas = gcnew Canvas();

// Create the child Rectangle elements
myRectangle1 = gcnew Rectangle();
myRectangle2 = gcnew Rectangle();
myRectangle3 = gcnew Rectangle();
myRectangle4 = gcnew Rectangle();
myRectangle5 = gcnew Rectangle();
myRectangle6 = gcnew Rectangle();

// Set properties on the Rectangle elements
Canvas::SetTop(myRectangle1, 100);
Canvas::SetLeft(myRectangle1, 100);
Canvas::SetZIndex(myRectangle1, 3);
myRectangle1->Fill = Brushes::Blue;
myRectangle1->Width = 100;
myRectangle1->Height = 100;

Canvas::SetTop(myRectangle2, 150);
Canvas::SetLeft(myRectangle2, 150);
Canvas::SetZIndex(myRectangle2, 1);
myRectangle2->Fill = Brushes::Yellow;
myRectangle2->Width = 100;
myRectangle2->Height = 100;

Canvas::SetTop(myRectangle3, 200);
Canvas::SetLeft(myRectangle3, 200);
Canvas::SetZIndex(myRectangle3, 2);
myRectangle3->Fill = Brushes::Green;
myRectangle3->Width = 100;
myRectangle3->Height = 100;

Canvas::SetTop(myRectangle4, 300);
Canvas::SetLeft(myRectangle4, 200);
Canvas::SetZIndex(myRectangle4, 1);
myRectangle4->Fill = Brushes::Green;
myRectangle4->Width = 100;
myRectangle4->Height = 100;

Canvas::SetTop(myRectangle5, 350);
Canvas::SetLeft(myRectangle5, 150);
Canvas::SetZIndex(myRectangle5, 3);
myRectangle5->Fill = Brushes::Yellow;
myRectangle5->Width = 100;
myRectangle5->Height = 100;

Canvas::SetTop(myRectangle6, 400);
Canvas::SetLeft(myRectangle6, 100);
Canvas::SetZIndex(myRectangle6, 2);
myRectangle6->Fill = Brushes::Blue;
myRectangle6->Width = 100;
myRectangle6->Height = 100;

// Add the Rectangles to the Canvas' Children collection
myCanvas->Children->Add(myRectangle1);
myCanvas->Children->Add(myRectangle2);
myCanvas->Children->Add(myRectangle3);
myCanvas->Children->Add(myRectangle4);
myCanvas->Children->Add(myRectangle5);
myCanvas->Children->Add(myRectangle6);

// Add the Canvas as the Content of the parent Window Object
mainWindow->Content = myCanvas;
mainWindow->Show();

// Create the application's main window
mainWindow = new Window ();
mainWindow.Title = "Canvas ZIndex Sample";

// Create the Canvas
myCanvas = new Canvas();

// Create the child Rectangle elements
myRectangle1 = new Rectangle();
myRectangle2 = new Rectangle();
myRectangle3 = new Rectangle();
myRectangle4 = new Rectangle();
myRectangle5 = new Rectangle();
myRectangle6 = new Rectangle();

// Set properties on the Rectangle elements
Canvas.SetTop(myRectangle1, 100);
Canvas.SetLeft(myRectangle1, 100);
Canvas.SetZIndex(myRectangle1, 3);
myRectangle1.Fill = Brushes.Blue;
myRectangle1.Width = 100;
myRectangle1.Height = 100;

Canvas.SetTop(myRectangle2, 150);
Canvas.SetLeft(myRectangle2, 150);
Canvas.SetZIndex(myRectangle2, 1);
myRectangle2.Fill = Brushes.Yellow;
myRectangle2.Width = 100;
myRectangle2.Height = 100;

Canvas.SetTop(myRectangle3, 200);
Canvas.SetLeft(myRectangle3, 200);
Canvas.SetZIndex(myRectangle3, 2);
myRectangle3.Fill = Brushes.Green;
myRectangle3.Width = 100;
myRectangle3.Height = 100;

Canvas.SetTop(myRectangle4, 300);
Canvas.SetLeft(myRectangle4, 200);
Canvas.SetZIndex(myRectangle4, 1);
myRectangle4.Fill = Brushes.Green;
myRectangle4.Width = 100;
myRectangle4.Height = 100;

Canvas.SetTop(myRectangle5, 350);
Canvas.SetLeft(myRectangle5, 150);
Canvas.SetZIndex(myRectangle5, 3);
myRectangle5.Fill = Brushes.Yellow;
myRectangle5.Width = 100;
myRectangle5.Height = 100;

Canvas.SetTop(myRectangle6, 400);
Canvas.SetLeft(myRectangle6, 100);
Canvas.SetZIndex(myRectangle6, 2);
myRectangle6.Fill = Brushes.Blue;
myRectangle6.Width = 100;
myRectangle6.Height = 100;

// Add the Rectangles to the Canvas' Children collection
myCanvas.Children.Add(myRectangle1);
myCanvas.Children.Add(myRectangle2);
myCanvas.Children.Add(myRectangle3);
myCanvas.Children.Add(myRectangle4);
myCanvas.Children.Add(myRectangle5);
myCanvas.Children.Add(myRectangle6);

// Add the Canvas as the Content of the parent Window Object
mainWindow.Content = myCanvas;
mainWindow.Show ();

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" WindowTitle="ZIndex Sample">
  <Canvas>
    <Rectangle Canvas.ZIndex="3" Width="100" Height="100" Canvas.Top="100" Canvas.Left="100" Fill="blue"/>
    <Rectangle Canvas.ZIndex="1" Width="100" Height="100" Canvas.Top="150" Canvas.Left="150" Fill="yellow"/>
    <Rectangle Canvas.ZIndex="2" Width="100" Height="100" Canvas.Top="200" Canvas.Left="200" Fill="green"/>

    <!-- Reverse the order to illustrate z-index property -->

    <Rectangle Canvas.ZIndex="1" Width="100" Height="100" Canvas.Top="300" Canvas.Left="200" Fill="green"/>
    <Rectangle Canvas.ZIndex="3" Width="100" Height="100" Canvas.Top="350" Canvas.Left="150" Fill="yellow"/>
    <Rectangle Canvas.ZIndex="2" Width="100" Height="100" Canvas.Top="400" Canvas.Left="100" Fill="blue"/>
  </Canvas>
</Page>

Commenti

Maggiore è l'oggetto value di un dato element, maggiore è la probabilità che venga element visualizzato in primo piano. Analogamente, se un oggetto element ha un valore relativamente basso value, element è probabile che venga visualizzato in background. Ad esempio, un oggetto element con un value valore pari a 5 verrà visualizzato sopra un element oggetto con un value valore pari a 4, che a sua volta verrà visualizzato sopra un element valore pari a 3 e così via. I valori negativi sono consentiti e continuano questo modello di precedenza.

I membri di una Children raccolta con valori uguali ZIndex vengono visualizzati nell'ordine in cui vengono visualizzati nella struttura ad albero visuale. È possibile determinare la posizione di indice di un elemento figlio eseguendo l'iterazione dei membri della Children raccolta.

Informazioni proprietà di dipendenza

Campo Identificatore	ZIndexProperty
Proprietà dei metadati impostate su true	Nessuno