Xmal文件下

  <StackPanel><Button Content="加法"  Click="Button_Click_1"  Width="200" Height="50" Background="Green" MouseEnter="Button_MouseEnter" MouseLeave="Button_MouseLeave"/><TextBlock Text="计算结果"  x:Name="txtTotal"/></StackPanel>

对应的.cs文件

    private void Button_Click_1(object sender, RoutedEventArgs e){int num1 = 200;int num2 = 300;int total = num1 + num2;txtTotal.Text = total.ToString();txtTotal.Visibility =Visibility.Visible;}private void Button_MouseEnter(object sender, MouseEventArgs e){txtTotal.Text = "你的鼠标移入到了按钮区域";txtTotal.Visibility = Visibility.Visible;}private void Button_MouseLeave(object sender, MouseEventArgs e){txtTotal.Text = "你的鼠标离开了按钮";txtTotal.Visibility = Visibility.Visible;}
}