C# WPF 初步

照书敲了一个例子，效果挺炫的，先看图

不得不说，微软家的东西包装的真是好，这么华丽的效果，只要简单几步

新建一个 WPF 应用程序，叫做 Ch34Ex01
修改自动打开的 Windows1.xaml ，改成这样样子

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="Ch34Ex01.Window1"
    Title="Color Spinner" Height="370" Width="270" >
    <Window.Resources>
        <Storyboard x:Key="Spin">
            <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="ellipse1" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(RotateTransform.Angle)" RepeatBehavior="Forever">
                <SplineDoubleKeyFrame KeyTime="00:00:10" Value="360"/>
            </DoubleAnimationUsingKeyFrames>
            <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="ellipse2" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(RotateTransform.Angle)" RepeatBehavior="Forever">
                <SplineDoubleKeyFrame KeyTime="00:00:10" Value="-360"/>
            </DoubleAnimationUsingKeyFrames>
            <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="ellipse3" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(RotateTransform.Angle)" RepeatBehavior="Forever">
                <SplineDoubleKeyFrame KeyTime="00:00:05" Value="360"/>
            </DoubleAnimationUsingKeyFrames>
            <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="ellipse4" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(RotateTransform.Angle)" RepeatBehavior="Forever">
                <SplineDoubleKeyFrame KeyTime="00:00:05" Value="-360"/>
            </DoubleAnimationUsingKeyFrames>
        </Storyboard>
    </Window.Resources>
    <Window.Triggers>
        <EventTrigger RoutedEvent="FrameworkElement.Loaded">
            <BeginStoryboard Storyboard="{StaticResource Spin}" x:Name="Spin_BeginStoryboard"/>
        </EventTrigger>
        <EventTrigger RoutedEvent="ButtonBase.Click" SourceName="goButton">
            <ResumeStoryboard BeginStoryboardName="Spin_BeginStoryboard"/>
        </EventTrigger>
        <EventTrigger RoutedEvent="ButtonBase.Click" SourceName="stopButton">
            <PauseStoryboard BeginStoryboardName="Spin_BeginStoryboard"/>
        </EventTrigger>
    </Window.Triggers>
    <Window.Background>
        <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
            <GradientStop Color="#FFFFFFFF" Offset="0"/>
            <GradientStop Color="#FFFFC45A" Offset="1"/>
        </LinearGradientBrush>
    </Window.Background>
    <Grid>
        <Ellipse Margin="50,50,0,0" Name="ellipse5" Stroke="Black" Height="150" HorizontalAlignment="Left" VerticalAlignment="Top" Width="150">
            <Ellipse.BitmapEffect>
                <BlurBitmapEffect Radius="10"/>
            </Ellipse.BitmapEffect>
            <Ellipse.Fill>
                <RadialGradientBrush>
                    <GradientStop Color="#FF000000" Offset="1"/>
                    <GradientStop Color="#FFFFFFFF" Offset="0.306"/>
                </RadialGradientBrush>
            </Ellipse.Fill>
        </Ellipse>
        <Ellipse Margin="15,85,0,0" Name="ellipse1" Stroke="{x:Null}" Height="80" HorizontalAlignment="Left" VerticalAlignment="Top" Width="120" Fill="Red" Opacity="0.5" RenderTransformOrigin="0.92,0.5" >
            <Ellipse.BitmapEffect>
                <BevelBitmapEffect/>
            </Ellipse.BitmapEffect>
            <Ellipse.RenderTransform>
                <TransformGroup>
                    <RotateTransform Angle="0"/>
                </TransformGroup>
            </Ellipse.RenderTransform>
        </Ellipse>
        <Ellipse Margin="85,15,0,0" Name="ellipse2" Stroke="{x:Null}" Height="120" HorizontalAlignment="Left" VerticalAlignment="Top" Width="80" Fill="Blue" Opacity="0.5" RenderTransformOrigin="0.5,0.92" >
            <Ellipse.BitmapEffect>
                <BevelBitmapEffect/>
            </Ellipse.BitmapEffect>
            <Ellipse.RenderTransform>
                <TransformGroup>
                    <RotateTransform Angle="0"/>
                </TransformGroup>
            </Ellipse.RenderTransform>
        </Ellipse>
        <Ellipse Margin="115,85,0,0" Name="ellipse3" Stroke="{x:Null}" Height="80" HorizontalAlignment="Left" VerticalAlignment="Top" Width="120" Opacity="0.5" Fill="Yellow" RenderTransformOrigin="0.08,0.5" >
            <Ellipse.BitmapEffect>
                <BevelBitmapEffect/>
            </Ellipse.BitmapEffect>
            <Ellipse.RenderTransform>
                <TransformGroup>
                    <RotateTransform Angle="0"/>
                </TransformGroup>
            </Ellipse.RenderTransform>
        </Ellipse>
        <Ellipse Margin="85,115,0,0" Name="ellipse4" Stroke="{x:Null}" Height="120" HorizontalAlignment="Left" VerticalAlignment="Top" Width="80" Opacity="0.5" Fill="Green" RenderTransformOrigin="0.5,0.08" >
            <Ellipse.BitmapEffect>
                <BevelBitmapEffect/>
            </Ellipse.BitmapEffect>
            <Ellipse.RenderTransform>
                <TransformGroup>
                    <RotateTransform Angle="0"/>
                </TransformGroup>
            </Ellipse.RenderTransform>
        </Ellipse>
        <Button Height="23" HorizontalAlignment="Left" Margin="20,0,0,56" Name="goButton" VerticalAlignment="Bottom" Width="75" Content="Go"/>
        <Button Height="23" HorizontalAlignment="Left" Margin="152,0,0,56" Name="stopButton" VerticalAlignment="Bottom" Width="75" Content="Stop"/>
        <Button Height="23" HorizontalAlignment="Left" Margin="85,0,86,16" Name="toggleButton" VerticalAlignment="Bottom" Width="75" Content="Toggle" Click="toggleButton_Click" />
    </Grid>
</Window>

双击 toggle 按钮，在打开的 Windows1.xaml.cs 中写入这些

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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;
// add by zrj
using System.Windows.Media.Animation;

namespace Ch34Ex01
{
    /// <summary>
    /// Window1.xaml 的交互逻辑
    /// </summary>
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }

        private void toggleButton_Click(object sender, RoutedEventArgs e)
        {
            Storyboard spinStoryboard = Resources["Spin"] as Storyboard;
            if (spinStoryboard != null)
            {
                if (spinStoryboard.GetIsPaused(this))
                {
                    spinStoryboard.Resume(this);
                }
                else
                {
                    spinStoryboard.Pause(this);
                }
            }
        }
    }
}

OK，跑一下