Silverlight 3 missing ScrollViewer.ScrollChanged event workaround?

scrollbar, scrollviewer, silverlight

Solution

You can use element binding, here is a daft example:-

<Grid x:Name="LayoutRoot" Background="White">
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="100" />
        <ColumnDefinition Width="100" />
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
        <RowDefinition Height="60" />
    </Grid.RowDefinitions>
    <ScrollViewer x:Name="ScrollSource">
        <StackPanel>
            <TextBlock>Hello</TextBlock>
            <TextBlock>World</TextBlock>
            <TextBlock>Yasso</TextBlock>
            <TextBlock>Kosmos</TextBlock>
        </StackPanel>
    </ScrollViewer>
    <TextBox Grid.Column="1" Text="{Binding VerticalOffset, ElementName=ScrollSource}" />

</Grid>

As the `ScrollViewer` is scrolled the Text property of the TextBox is advised of the new value.

Problem

I want to be notified of changes to the VerticalOffset of the vertical scrollbar of a ScrollViewer. In WPF there is a ScrollViewer.ScrollChanged event, but in Silverlight 3 this is missing. Does anyone know a workaround?

Original source