WPF 使用用户控件UserControl来切换界面（一）

程序集整体框架如下

 

 主窗体UI文件MainWindow.xaml

<Window x:Class="WpfApp1.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:WpfApp1"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">

    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="200"/>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>
        <Border Grid.Column ="0"  BorderThickness="3" BorderBrush="Gray">
            <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="50"/>
                    <RowDefinition Height="50"/>
                </Grid.RowDefinitions>
                <Button Content="用户控件1" Click="ButtonClick1" Margin="3"/><!--使用按键事件来切换-->
                <Button Content="用户控件2" Click="ButtonClick2" Margin="3" Grid.Row="1"/>
            </Grid>
        </Border>

        <Border Grid.Column ="1" BorderBrush="Gray" BorderThickness="3">
            <ContentPresenter  Content="{Binding UserContent}"/><!--使用内容呈现器来显示用户控件界面-->
        </Border>
    </Grid>
</Window>

MainWindow.xaml