Artigo
11/18/2011

Viewbox.StretchDirection Property

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Gets or sets the StretchDirection, which determines how scaling is applied to the contents of a Viewbox.

Namespace: System.Windows.Controls
Assembly: System.Windows (in System.Windows.dll)

Syntax

'Declaration
Public Property StretchDirection As StretchDirection

public StretchDirection StretchDirection { get; set; }

<ViewBox StretchDirection = "stretchDirectionValue"/>

XAML Values

stretchDirectionValue
A named constant of the StretchDirection enumeration, such as Both

Property Value

Type: System.Windows.Controls.StretchDirection
A StretchDirection, which determines how scaling is applied to the contents of a Viewbox. The default is Both.

Remarks

Use this property to prevent the contents of a Viewbox from being smaller or larger than its original size.

If you set the StretchDirection of the Viewbox to UpOnly, the Viewbox only enlarges its contents. The following image shows a Viewbox control with its StretchDirection set to UpOnly.

StretchDirection = UpOnly

StretchDirection UpOnly

If you set the StretchDirection of the Viewbox to DownOnly, the Viewbox only shrinks its contents. The following image shows a Viewbox control with its StretchDirection set to DownOnly.

StretchDirection = DownOnly

StretchDirection DownOnly

If you set the StretchDirection to Both, the Viewbox can shrink or enlarge its contents.

StretchDirection = Both

StretchDirection Both

Examples

The following example shows how you can set the StretchDirection properties in C# and Visual Basic. This example is a part of a larger example available in the Viewbox class overview.

'Setting the StretchDirection property to UpOnly
Private Sub sdUpOnly(ByVal sender As Object, ByVal e As RoutedEventArgs)
    vb1.StretchDirection = StretchDirection.UpOnly
    vb2.StretchDirection = StretchDirection.UpOnly
    vb3.StretchDirection = StretchDirection.UpOnly
    txt2.Text = "StretchDirection is now UpOnly."
End Sub

'Setting the StretchDirection property to DownOnly
Private Sub sdDownOnly(ByVal sender As Object, ByVal e As RoutedEventArgs)
    vb1.StretchDirection = StretchDirection.DownOnly
    vb2.StretchDirection = StretchDirection.DownOnly
    vb3.StretchDirection = StretchDirection.DownOnly
    txt2.Text = "StretchDirection is now DownOnly."
End Sub

'Setting the StretchDirection property to Both
Private Sub sdBoth(ByVal sender As Object, ByVal e As RoutedEventArgs)
    vb1.StretchDirection = StretchDirection.Both
    vb2.StretchDirection = StretchDirection.Both
    vb3.StretchDirection = StretchDirection.Both
    txt2.Text = "StretchDirection is now Both."
End Sub

//Setting the StretchDirection property to UpOnly
private void sdUpOnly(object sender, RoutedEventArgs e)
{
    vb1.StretchDirection = StretchDirection.UpOnly;
    vb2.StretchDirection = StretchDirection.UpOnly;
    vb3.StretchDirection = StretchDirection.UpOnly;
    txt2.Text = "StretchDirection is now UpOnly.";
}

//Setting the StretchDirection property to DownOnly
private void sdDownOnly(object sender, RoutedEventArgs e)
{
    vb1.StretchDirection = StretchDirection.DownOnly;
    vb2.StretchDirection = StretchDirection.DownOnly;
    vb3.StretchDirection = StretchDirection.DownOnly;
    txt2.Text = "StretchDirection is now DownOnly.";
}

//Setting the StretchDirection property to Both
private void sdBoth(object sender, RoutedEventArgs e)
{
    vb1.StretchDirection = StretchDirection.Both;
    vb2.StretchDirection = StretchDirection.Both;
    vb3.StretchDirection = StretchDirection.Both;
    txt2.Text = "StretchDirection is now Both.";
}

Version Information

Silverlight

Supported in: 5, 4

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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