WPF中是否有RowSpan ="All"？

Question

我创建了一个GridSplitter跨越我的网格中的3行,如下所示:

<GridSplitter Grid.Row="0" Grid.Column="1" Background="Yellow"
              HorizontalAlignment="Stretch" VerticalAlignment="Stretch"
              Width="Auto" Height="Auto" ResizeDirection="Columns"
              Grid.RowSpan="3" ...

但是,可以想象我可能会在以后的阶段向我的网格中添加另一行,我真的不想回去更新所有的rowpans.

我的第一个猜测是Grid.RowSpan="*",但这不会编译.

Answer 1

简单的解决方案:

<!-- RowSpan == Int32.MaxValue -->
<GridSplitter Grid.Row="0"
              Grid.Column="1"
              Grid.RowSpan="2147483647" />

Answer 2

您可以绑定到RowDefinitions.Count,但需要在手动添加行时更新绑定.

编辑:实际上只有半手动
Xaml:

<StackPanel Orientation="Vertical">
    <Grid Name="GridThing">
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>   
            <ColumnDefinition/>         
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition />
            <RowDefinition />   
            </Grid.RowDefinitions>
            <Grid.Children>
                <Button Content="TopRight" Grid.Row="0" Grid.Column="1"/>
                <Button Content="LowerRight" Grid.Row="1" Grid.Column="1"/>
            <Button Content="Span Rows" Name="BSpan" Grid.RowSpan="{Binding RelativeSource={RelativeSource AncestorType=Grid}, Path=RowDefinitions.Count, Mode=OneWay}"/>
        </Grid.Children>
        </Grid>
    <Button Click="Button_Click" Content="Add Row" />
</StackPanel>

码:

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        GridThing.RowDefinitions.Add(new RowDefinition() { Height = new GridLength(20) });
        foreach (FrameworkElement child in GridThing.Children)
        {
            BindingExpression exp = child.GetBindingExpression(Grid.RowSpanProperty);
            if (exp != null)
            {
                exp.UpdateTarget();
            }
        }
    }