WPF GridSplitter使用

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="*"></RowDefinition>
        <RowDefinition Height="5"></RowDefinition>
        <RowDefinition Height="*"></RowDefinition>
    </Grid.RowDefinitions>
    <TextBlock Grid.Row="0"  Text="你好" Background="Red" TextWrapping="Wrap"></TextBlock>
    <GridSplitter  Grid.Row="1"    HorizontalAlignment="Stretch"></GridSplitter>
    <TextBlock Text="你好" TextWrapping="Wrap" FontSize="20" Background="Green" Grid.Row="2"></TextBlock>
   

</Grid>

注意将gridsplitter的horizontalalignment设为Stretch

如果是左右的话就设VerticalAlignment为Strech