---

像winform一样，事件，赋值，硬编码的方式实现。 // 传说，WPF 有五种绑定方式。

▲ 效果

<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="250" Width="300">
    <Grid>
        <Button x:Name="btnTest" Click="BtnTest_Click" Content="点击测试" Width="100" Height="30"/>
        <Label x:Name="label" Content="Label" HorizontalAlignment="Left" VerticalAlignment="Top" RenderTransformOrigin="2.845,4.051" Margin="128,41,0,0"/>
    </Grid>
</Window>

using System.Windows;

namespace WpfApp1
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            this.WindowStartupLocation = WindowStartupLocation.CenterScreen;
        }

        private void BtnTest_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show("Hello!");
            this.label.Content = "World!";
        }
    }
}