Demo1 触发事件

<Window x:Class="WPFExample.MainWindow"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"Title="WPF Example" Height="600" Width="800"><Grid><TextBlock x:Name="txtTotal" Text="计算结果" Visibility="Hidden"/><StackPanel><Button  Content="Click me" Height="30" Width="200" Click="Button_Click" HorizontalAlignment="Center" Background="#FFE8DD2C" BorderBrush="#FF3E94ED" MouseEnter="Button_Mouse_Enter" MouseLeave="Button_Mouse_Leave"/></StackPanel></Grid>
</Window>

using System;
using System.Windows;namespace WPFExample
{public partial class MainWindow : Window{public MainWindow(){InitializeComponent();}private void Button_Click(object sender, RoutedEventArgs e){int num1 = 10;int num2 = 20;int total=num1 + num2;txtTotal.Text=total.ToString();txtTotal.Visibility=Visibility.Visible;}private void Button_Mouse_Enter(object sender, System.Windows.Input.MouseEventArgs e){txtTotal.Text = "鼠标进入这个范围了";txtTotal.Visibility = Visibility.Visible;}private void Button_Mouse_Leave(object sender, System.Windows.Input.MouseEventArgs e){txtTotal.Text = "鼠标移出这个范围了";txtTotal.Visibility = Visibility.Visible;}}
}