Question

I am trying to make TextBox to wrap text and grow with the Window. That works if I don’t set ScrollViewer‘s HorizontalScrollBarVisibility property. But if I do, TextBox will grow infinitely. The problem is solved by setting MaxWidth property to the TextBox, but in that case TextBox does not grow beyond the MaxWidth value. My idea was then to bind MaxWidth to ColumnDefinition‘s ActualWidth, but that also doesn’t work because ColumnDefinition‘s ActualWidth property is not a DependencyProperty. Here is my code:

<ScrollViewer VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto">
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto" />
                <ColumnDefinition Width="*" />
            </Grid.ColumnDefinitions>
            <TextBlock Grid.Row="0" Grid.Column="0" Text="Name:" Margin="5" />
            <TextBox MinWidth="200" Grid.Row="0" Grid.Column="1" TextWrapping="Wrap" AcceptsReturn="True" Margin="5"/>
        </Grid>
    </ScrollViewer>

Any ideas will be appreciated.

Answer 1

Try this:

<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="Auto" />
        <ColumnDefinition Width="*" />
    </Grid.ColumnDefinitions>
    <TextBlock Text="Name:" Margin="5" />
    <ScrollViewer VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto" Grid.Column="1">
        <TextBox MinWidth="200" TextWrapping="Wrap" AcceptsReturn="True" Margin="5" MaxWidth="{Binding Path=ActualWidth, RelativeSource={RelativeSource AncestorType={x:Type ScrollViewer}}}" />
    </ScrollViewer>
</Grid>