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Anleitung: Verwenden der zugeordneten Eigenschaften von Canvas zum Positionieren der Kind-Elemente

In diesem Beispiel wird gezeigt, wie die angefügten Eigenschaften von Canvas verwendet werden, um untergeordnete Elemente zu positionieren.

Beispiel

Im folgenden Beispiel werden vier Button Elemente als untergeordnete Elemente eines übergeordneten Elements Canvashinzugefügt. Jedes Element wird durch ein Bottom, Left, Right und Top. Jede Button wird relativ zum übergeordneten Element Canvas und entsprechend dem zugewiesenen Eigenschaftswert positioniert.


// Create the application's main window
mainWindow = gcnew System::Windows::Window();
mainWindow->Title = "Canvas Attached Properties Sample";

// Add a Border
Border^ myBorder = gcnew Border();
myBorder->HorizontalAlignment = HorizontalAlignment::Left;
myBorder->VerticalAlignment = VerticalAlignment::Top;
myBorder->BorderBrush = Brushes::Black;
myBorder->BorderThickness = System::Windows::Thickness(2);

// Create the Canvas
Canvas^ myCanvas = gcnew Canvas();
myCanvas->Background = Brushes::LightBlue;
myCanvas->Width = 400;
myCanvas->Height = 400;

// Create the child Button elements
Button^ myButton1 = gcnew Button();
Button^ myButton2 = gcnew Button();
Button^ myButton3 = gcnew Button();
Button^ myButton4 = gcnew Button();

// Set Positioning attached properties on Button elements
Canvas::SetTop(myButton1, 50);
myButton1->Content = "Canvas.Top=50";
Canvas::SetBottom(myButton2, 50);
myButton2->Content = "Canvas.Bottom=50";
Canvas::SetLeft(myButton3, 50);
myButton3->Content = "Canvas.Left=50";
Canvas::SetRight(myButton4, 50);
myButton4->Content = "Canvas.Right=50";

// Add Buttons to the Canvas' Children collection
myCanvas->Children->Add(myButton1);
myCanvas->Children->Add(myButton2);
myCanvas->Children->Add(myButton3);
myCanvas->Children->Add(myButton4);

// Add the Canvas as the lone Child of the Border
myBorder->Child = myCanvas;

// Add the Border as the Content of the Parent Window Object
mainWindow->Content = myBorder;
mainWindow->Show();



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

// Add a Border
Border myBorder = new Border();
myBorder.HorizontalAlignment = HorizontalAlignment.Left;
myBorder.VerticalAlignment = VerticalAlignment.Top;
myBorder.BorderBrush = Brushes.Black;
myBorder.BorderThickness = new Thickness(2);

// Create the Canvas
Canvas myCanvas = new Canvas();
myCanvas.Background = Brushes.LightBlue;
myCanvas.Width = 400;
myCanvas.Height = 400;

// Create the child Button elements
Button myButton1 = new Button();
Button myButton2 = new Button();
Button myButton3 = new Button();
Button myButton4 = new Button();

// Set Positioning attached properties on Button elements
Canvas.SetTop(myButton1, 50);
myButton1.Content = "Canvas.Top=50";
Canvas.SetBottom(myButton2, 50);
myButton2.Content = "Canvas.Bottom=50";
Canvas.SetLeft(myButton3, 50);
myButton3.Content = "Canvas.Left=50";
Canvas.SetRight(myButton4, 50);
myButton4.Content = "Canvas.Right=50";

// Add Buttons to the Canvas' Children collection
myCanvas.Children.Add(myButton1);
myCanvas.Children.Add(myButton2);
myCanvas.Children.Add(myButton3);
myCanvas.Children.Add(myButton4);

// Add the Canvas as the lone Child of the Border
myBorder.Child = myCanvas;

// Add the Border as the Content of the Parent Window Object
mainWindow.Content = myBorder;
mainWindow.Show ();


WindowTitle = "Attached Properties Sample"
' Add a Border
Dim myBorder As New Border()
myBorder.HorizontalAlignment = Windows.HorizontalAlignment.Left
myBorder.VerticalAlignment = Windows.VerticalAlignment.Top
myBorder.BorderBrush = Brushes.Black
myBorder.BorderThickness = New Thickness(2)

' Create a Canvas as the root Panel
Dim myCanvas As New Canvas()
myCanvas.Background = Brushes.LightBlue
myCanvas.Width = 400
myCanvas.Height = 400

' Create the child Button elements
Dim myButton1 As New Button()
Dim myButton2 As New Button()
Dim myButton3 As New Button()
Dim myButton4 As New Button()

' Set Positioning attached properties on Button elements
Canvas.SetTop(myButton1, 50)
myButton1.Content = "Canvas.Top=50"
Canvas.SetBottom(myButton2, 50)
myButton2.Content = "Canvas.Bottom=50"
Canvas.SetLeft(myButton3, 50)
myButton3.Content = "Canvas.Left=50"
Canvas.SetRight(myButton4, 50)
myButton4.Content = "Canvas.Right=50"

' Add Buttons to the Canvas' Children collection
myCanvas.Children.Add(myButton1)
myCanvas.Children.Add(myButton2)
myCanvas.Children.Add(myButton3)
myCanvas.Children.Add(myButton4)

' Add the Canvas as the lone Child of the Border
myBorder.Child = myCanvas
Me.Content = myBorder

Siehe auch