FlowDocumentScrollViewer.Zoom Property

Reference

Definition

Namespace:: System.Windows.Controls

Assembly:: PresentationFramework.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets or sets the current zoom level.

public:
 property double Zoom { double get(); void set(double value); };

public double Zoom { get; set; }

member this.Zoom : double with get, set

Public Property Zoom As Double

Property Value

Double

The current zoom level, interpreted as a percentage. The default is 100.0 (a zoom level of 100%).

Examples

The following example shows how to set the Zoom attribute.

XAML

<FlowDocumentScrollViewer
  HorizontalScrollBarVisibility="Auto" 
  VerticalScrollBarVisibility="Auto" 
  IsSelectionEnabled="True" 
  IsToolBarVisible="True" 
  MinZoom="50" MaxZoom="1000"
  Zoom="120" ZoomIncrement="5"
>
  <FlowDocument>
    <Paragraph>
      Flow content...
    </Paragraph>
  </FlowDocument>
</FlowDocumentScrollViewer>

The following example shows how to set the Zoom property programmatically.

FlowDocumentScrollViewer flowDocScrollViewer = new FlowDocumentScrollViewer();

// Enable content selection.
flowDocScrollViewer.IsSelectionEnabled = true;
// Enable the toolbar.
flowDocScrollViewer.IsToolBarVisible = true;

// Set zoom between 50% and 1000%.
flowDocScrollViewer.MinZoom = 50;
flowDocScrollViewer.MaxZoom = 1000;
// Set the zoom increment to 5%.
flowDocScrollViewer.ZoomIncrement = 5;
// Set the initial zoom to 120%.
flowDocScrollViewer.Zoom = 120;

FlowDocument flowDoc = new FlowDocument(new Paragraph(new Run("Flow content...")));
flowDocScrollViewer.Document = flowDoc;

Dim flowDocScrollViewer As New FlowDocumentScrollViewer()

With flowDocScrollViewer
    ' Enable content selection.
    .IsSelectionEnabled = True
    ' Enable the toolbar.
    .IsToolBarVisible = True

    ' Set zoom between 50% and 1000%.
    .MinZoom = 50
    .MaxZoom = 1000
    ' Set the zoom increment to 5%.
    .ZoomIncrement = 5
    ' Set the initial zoom to 120%.
    .Zoom = 120

    Dim flowDoc As New FlowDocument(New Paragraph(New Run("Flow content...")))
    .Document = flowDoc
End With

Remarks

The zoom level is constrained by the values of the MinZoom and MaxZoom properties.

Dependency Property Information

Item	Value
Identifier field	ZoomProperty
Metadata properties set to `true`	None

Applies to

產品	版本
.NET Framework	3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
Windows Desktop	3.0, 3.1, 5, 6, 7, 8, 9, 10

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