Útmutató: A tartalom flowDirectionjának módosítása programozott módon

Ez a példa bemutatja, hogyan módosíthatja programozott módon egy FlowDirectionFlowDocumentReader tulajdonságát.

Gombelemek létrehozása

Két Button elem jön létre, amelyek mindegyike a FlowDirectionlehetséges értékeinek egyikét jelöli. Ha egy gombra kattint, a társított tulajdonságérték egy FlowDocumentReadernevű tf1 tartalmára lesz alkalmazva. A tulajdonság értéke egy TextBlock nevű txt1-be is be van írva.

<StackPanel DockPanel.Dock="Top" Orientation="Horizontal" Margin="0,0,0,10">
  <Button Click="LR">LeftToRight</Button>
  <Button Click="RL">RightToLeft</Button>
</StackPanel>

<TextBlock Name="txt1" DockPanel.Dock="Bottom" Margin="0,50,0,0"/>

<FlowDocumentReader>
  <FlowDocument FontFamily="Arial" Name="tf1">
    <Paragraph>
    Lorem ipsum dolor sit amet, consectetuer adipiscing elit, 
    sed diam nonummy nibh euismod tincidunt ut laoreet dolore 
    magna aliquam erat volutpat.  Ut wisi enim ad minim veniam, 
    quis nostrud exerci tation ullamcorper suscipit lobortis nisl 
    ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
    Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed 
    diam nonummy nibh euismod tincidunt ut laoreet dolore magna 
    aliquam erat volutpat.  Ut wisi enim ad minim veniam, quis 
    nostrud exerci tation ullamcorper suscipit lobortis nisl ut 
    uliquip ex ea commodo consequat. Duis autem vel eum iriure. 
    Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed 
    diam nonummy nibh euismod tincidunt ut laoreet dolore magna 
    aliquam erat volutpat.  Ut wisi enim ad minim veniam, quis 
    nostrud exerci tation ullamcorper suscipit lobortis nisl ut 
    aliquip ex ea commodo consequat. Duis autem vel eum iriure.
    </Paragraph>
    <Paragraph>
    Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed 
    diam nonummy nibh euismod tincidunt ut laoreet dolore magna 
    aliquam erat volutpat.  Ut wisi enim ad minim veniam, quis 
    nostrud exerci tation ullamcorper suscipit lobortis nisl ut 
    aliquip ex ea commodo consequat. Duis autem vel eum iriure. 
    Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed 
    diam nonummy nibh euismod tincidunt ut laoreet dolore magna 
    aliquam erat volutpat.  Ut wisi enim ad minim veniam, quis 
    nostrud exerci tation ullamcorper suscipit lobortis nisl ut 
    aliquip ex ea commodo consequat. Duis autem vel eum iriure. 
    Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed 
    diam nonummy nibh euismod tincidunt ut laoreet dolore magna 
    aliquam erat volutpat.  Ut wisi enim ad minim veniam, quis 
    nostrud exerci tation ullamcorper suscipit lobortis nisl ut 
    aliquip ex ea commodo consequat. Duis autem vel eum iriure.
    </Paragraph>
  </FlowDocument>
</FlowDocumentReader>

Példa C#-kódra

A fenti gombkattintásokhoz társított eseményeket egy C#-kód mögötti fájl kezeli.

private void LR(object sender, RoutedEventArgs e)
{
    tf1.FlowDirection = FlowDirection.LeftToRight;
    txt1.Text = "FlowDirection is now " + tf1.FlowDirection;
}
private void RL(object sender, RoutedEventArgs e)
{
    tf1.FlowDirection = FlowDirection.RightToLeft;
    txt1.Text = "FlowDirection is now " + tf1.FlowDirection;
}

Private Sub LR(ByVal sender As Object, ByVal e As RoutedEventArgs)
    tf1.FlowDirection = FlowDirection.LeftToRight
    txt1.Text = "FlowDirection is now " & tf1.FlowDirection
End Sub
Private Sub RL(ByVal sender As Object, ByVal e As RoutedEventArgs)
    tf1.FlowDirection = FlowDirection.RightToLeft
    txt1.Text = "FlowDirection is now " & tf1.FlowDirection
End Sub