WPFインスタンス（1）

時計プログラム

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace CLOCK
{
    
    
    using System.Threading;
    using System.Windows.Threading;
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
    
    
        //计时器
        System.Timers.Timer timer = new System.Timers.Timer(1000);
        public MainWindow()
        {
    
    
            InitializeComponent();
            #region 初始化时间
            secondPointer.Angle = DateTime.Now.Second * 6;
            minutePointer.Angle = DateTime.Now.Minute * 6;
            hourPointer.Angle = (DateTime.Now.Hour * 30) + (DateTime.Now.Minute * 0.5);
            this.labTime.Content = DateTime.Now.ToString("HH:mm:ss");
            #endregion
            timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);
            timer.Enabled = true;
        }

        private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
    
    
            //进行拖放移动
            this.DragMove();
        }
        private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
    
    
            //UI异步更新
            this.Dispatcher.Invoke(DispatcherPriority.Normal, (Action)(() =>
            {
    
    
                //秒针转动,秒针绕一圈360度，共60秒，所以1秒转动6度
                secondPointer.Angle = DateTime.Now.Second * 6;
                //分针转动,分针绕一圈360度，共60分，所以1分转动6度
                minutePointer.Angle = DateTime.Now.Minute * 6;
                //时针转动,时针绕一圈360度，共12时，所以1时转动30度。
                //另外同一个小时内，随着分钟数的变化(绕一圈60分钟），时针也在缓慢变化（转动30度，30/60=0.5)
                hourPointer.Angle = (DateTime.Now.Hour * 30) + (DateTime.Now.Minute * 0.5);
                //更新时间值
                this.labTime.Content = DateTime.Now.ToString("HH:mm:ss");
            }));
        }
    }
}

<Window x:Class="CLOCK.MainWindow"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         Title="MainWindow" Margin="2" Height="327" Width="311" AllowsTransparency="True" 
         WindowStyle="None" Background="Transparent" WindowStartupLocation="CenterScreen"  
         ResizeMode="NoResize" Topmost="False" Opacity="1">

    <Grid Width="300" Height="300" MouseLeftButtonDown="Grid_MouseLeftButtonDown">
        <Grid.Background>
            <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                <GradientStop Color="#FF5E8120" Offset="0"/>
                <GradientStop Color="#FFF0B311" Offset="1"/>
            </LinearGradientBrush>
        </Grid.Background>
        <Ellipse HorizontalAlignment="Left" Height="262" Margin="18,20,0,0" VerticalAlignment="Top" Width="265">
            <Ellipse.Fill>
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="#FFCFB724" Offset="0"/>
                    <GradientStop Color="#FFA3E445" Offset="1"/>
                </LinearGradientBrush>
            </Ellipse.Fill>
            <Ellipse.Stroke>
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="#FFE8CA11" Offset="0"/>
                    <GradientStop Color="#FFA3E445" Offset="1"/>
                </LinearGradientBrush>
            </Ellipse.Stroke>
        </Ellipse>

        <Label x:Name="lab商标" Foreground="White" Margin="0,0,0,211" HorizontalAlignment="Center" VerticalAlignment="Bottom" Height="Auto" Width="Auto" FontSize="13" Content="SunMoon" />
        <Label x:Name="lab创建时间" Foreground="White" Margin="0,91,0,0" HorizontalAlignment="Center" VerticalAlignment="Top" Height="Auto" Width="Auto" Content="2020"/>
        <!-- 秒针定义  -->
        <Rectangle Margin="150,0,149,150" x:Name="rectangleSecond" Stroke="#FFF1A115" Height="120" VerticalAlignment="Bottom" Width="1">
            <Rectangle.RenderTransform>
                <RotateTransform x:Name="secondPointer" CenterX="0" CenterY="120" Angle="0"/>
            </Rectangle.RenderTransform>
        </Rectangle>

        <Rectangle Margin="150,50,149,150" x:Name="rectangleMinute" Stroke="#FF12A612" Width="1">

            <Rectangle.RenderTransform>
                <RotateTransform x:Name="minutePointer" CenterX="0" CenterY="100" Angle="45"/>
            </Rectangle.RenderTransform>

        </Rectangle>

        <!-- 时针定义  -->

        <Rectangle Margin="150,80,149,150" x:Name="rectangleHour" Stroke="#FFF3F30B" Width="1">

            <Rectangle.RenderTransform>

                <RotateTransform x:Name="hourPointer" CenterX="0" CenterY="70" Angle="90" />

            </Rectangle.RenderTransform>

        </Rectangle>

        <Label Content="00:00:00" FontSize="16" Foreground="White" Height="Auto" HorizontalAlignment="Center" Margin="114,0,113,86" x:Name="labTime" VerticalAlignment="Bottom" Width="Auto" />

    </Grid>

</Window>