كيفية القيام بما يلي: تغيير اتجاه تدفق المحتوى برمجيا
يوضح هذا المثال كيفية تغيير برمجياً خاصية FlowDirection التابعة الى FlowDocumentReader.
مثال
يتم إنشاء اثنين من عناصر Button ، كل عنصر يمثل إحدى القيم المحتملة من FlowDirection. عند النقر على زر ، يتم تطبيق قيمة الخاصية المقترنة به إلى محتويات FlowDocumentReader المسمى tf1. يتم أيضاً كتابة القيمة إلى TextBlock المسمى txt1.
<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>
الأحداث المقترنة بنقرات الزر المعرفة أعلاه تتم معالجتها في ملف التعليمات البرمجية الخلفية#C .
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
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;
}