long text cropped in textblock

I've a problem. I've a textblock and my text is cropped. It seems to appear only when the text is too long cause when the text is shorter, there is no problem.

So开发者_如何学编程 there is my code :

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
    <Grid.RowDefinitions>
        <RowDefinition Height="150" />
        <RowDefinition Height="447*" />
    </Grid.RowDefinitions>
        <Image Grid.Row="0" Source="{Binding TheContent.PathPicture}" />
        <ScrollViewer Grid.Row="1">
            <Grid>
                <TextBlock Text="{Binding TheContent.Text}" TextWrapping="Wrap" FontSize="24" />
            </Grid>
        </ScrollViewer>
</Grid>

Text is croping like this :

Is the only solution to summary my content ?

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The depth of a single textblock is limited to about 2000 pixels on WP7. You need to divide up your text into multiple blocks to display it all.

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Controls are limited to 2k square, but there's a fairly straight forward resolution in breaking your text up and presenting the blocks in a stackpanel and wrapping that in a ScrollViewer.

Alex Yakhnin demonstrates here.

Creating Scrollable TextBlock for WP7.