TestBlock width with ListView

 <ListView x:Name="ListView1" Margin="213,356,29,42.04" Padding="-7">
            <StackPanel  Width="{Binding ElementName=ListView1,Path=ActualWidth}" Margin="0">
                <TextBlock Padding="2" TextWrapping="Wrap">ddddddddddddddddddddddddddd</TextBlock>
                <TextBlock Padding="2" TextWrapping="Wrap">dddddddddddddddddddddffffffffffffffffffffffffff</TextBlock>
            </StackPanel>