Question

I have a WPF 3.5 MVVVM application which has a TextBlock in a ScrollViewer. I want to be able to call the LineUp/LineDown method of the control whenever there is a newline in the text block.

How do I implment this without violating any MVVM principles?

Thanks in advance,

Satya

            <Border BorderThickness="1" BorderBrush="Gray" CornerRadius="1" Margin="2" Grid.Row="0" Grid.Column="3" Grid.RowSpan="2">
                <ScrollViewer Name="Scroll" VerticalScrollBarVisibility="Auto" MinWidth="120" Height="80" 
                              CanContentScroll="True" 
                              >
                    <TextBlock TextWrapping="WrapWithOverflow" Padding="5" FontSize="10" Text="{Binding Path=GetScrollLogMessage}" DockPanel.Dock="Left" />
                </ScrollViewer>
            </Border>

Answer 1

Raise an event in your view model, and handle the event in the view’s code-behind.