WPF 分隔栏分割窗体简单测试

XAML:

<Window x:Class="WpfApp3.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp3"
        xmlns:sys="clr-namespace:System;assembly=mscorlib"
        mc:Ignorable="d" WindowStartupLocation="CenterScreen"
        Title="MainWindow" Height="250" Width="350">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="80"/>
            <ColumnDefinition  Width="auto"/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>

        <GridSplitter Grid.Column="1" VerticalAlignment="Stretch" Width="2" Background="Gray" ShowsPreview="True"/>
    </Grid>
</Window>

运行后：

鼠标拖拽这个分隔栏，会调整左右两边的空间。