GridSplitter的使用

注意：我们可以修改GridSplitter左右两边的单元格的 MinWidth和MaxWidth属性值，从而影响到GridSplitter能够左右移动的范围

注意:VerticalAlignment="Stretch"    使用的是Stretch

Code
 <UserControl x:Class="MySplitControl.Page"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:sp="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls"
    Width="400" Height="300">
    <Grid x:Name="LayoutRoot" ShowGridLines="True" Background="White" Width="400"  Height="300">
        <Grid.RowDefinitions>
            <RowDefinition />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition  MaxWidth="350" MinWidth="250"/>
            <ColumnDefinition Width="25" />
            <ColumnDefinition />
        </Grid.ColumnDefinitions>
        <Rectangle Fill="Red" Grid.Column="0" Grid.Row="0"></Rectangle>
        <Rectangle Fill="Blue" Grid.Column="1" Grid.Row="0"></Rectangle>
        <Rectangle Fill="Aqua"  Grid.Column="2" Grid.Row="0"></Rectangle>
        <sp:GridSplitter x:Name="grsplSplitterColumn" Grid.Column="1"  HorizontalAlignment="Center"  VerticalAlignment="Stretch" Background="Yellow"  Width="6"></sp:GridSplitter>
    </Grid>
</UserControl>