运行效果：
前台XAML代码：
<Grid>
<Button Content="开始" HorizontalAlignment="Left" Margin="10,10,0,0" Name="button1" VerticalAlignment="Top" Click="button1_Click" Width="48" />
<Label Name="lab_pro" Content="" Height="25" VerticalAlignment="Top" HorizontalAlignment="Left" Margin="80,20,0,0" />
<!--动画-->
<Grid Name="loading" Visibility="Collapsed" Height="41" Grid.Row="0" VerticalAlignment="Top" Margin="126,10,0,0" HorizontalAlignment="Left" Width="42">
<Grid.Resources>
<DrawingBrush x:Key="brush" Stretch="None" AlignmentX="Center" AlignmentY="Top">
<DrawingBrush.Drawing>
<GeometryDrawing Brush="Black">
<GeometryDrawing.Geometry>
<EllipseGeometry RadiusX="2" RadiusY="5"/>
</GeometryDrawing.Geometry>
</GeometryDrawing>
</DrawingBrush.Drawing>
</DrawingBrush>
</Grid.Resources>
<Rectangle x:Name="r01" Fill="{StaticResource brush}" Opacity="0.5" RenderTransformOrigin="0.5,0.5">
<Rectangle.RenderTransform>
<RotateTransform Angle="0"/>
</Rectangle.RenderTransform>
</Rectangle>
<Rectangle x:Name="r02" Fill="{StaticResource brush}" Opacity="0.5" RenderTransformOrigin="0.5,0.5">
<Rectangle.RenderTransform>
<RotateTransform Angle="30"/>
</Rectangle.RenderTransform>
</Rectangle>
<Rectangle x:Name="r03" Fill="{StaticResource brush}" Opacity="0.5" RenderTransformOrigin="0.5,0.5">
<Rectangle.RenderTransform>
<RotateTransform Angle="60"/>
</Rectangle.RenderTransform>
</Rectangle>
<Rectangle x:Name="r04" Fill="{StaticResource brush}" Opacity="0.5" RenderTransformOrigin="0.5,0.5">
<Rectangle.RenderTransform>
<RotateTransform Angle="90"/>
</Rectangle.RenderTransform>
</Rectangle>
<Rectangle x:Name="r05" Fill="{StaticResource brush}" Opacity="0.5" RenderTransformOrigin="0.5,0.5">
<Rectangle.RenderTransform>
<RotateTransform Angle="120"/>
</Rectangle.RenderTransform>
</Rectangle>
<Rectangle x:Name="r06" Fill="{StaticResource brush}" Opacity="0.5" RenderTransformOrigin="0.5,0.5">
<Rectangle.RenderTransform>
<RotateTransform Angle="150"/>
</Rectangle.RenderTransform>
</Rectangle>
<Rectangle x:Name="r07" Fill="{StaticResource brush}" Opacity="0.5" RenderTransformOrigin="0.5,0.5">
<Rectangle.RenderTransform>
<RotateTransform Angle="180"/>
</Rectangle.RenderTransform>
</Rectangle>
<Rectangle x:Name="r08" Fill="{StaticResource brush}" Opacity="0.5" RenderTransformOrigin="0.5,0.5">
<Rectangle.RenderTransform>
<RotateTransform Angle="210"/>
</Rectangle.RenderTransform>
</Rectangle>
<Rectangle x:Name="r09" Fill="{StaticResource brush}" Opacity="0.5" RenderTransformOrigin="0.5,0.5">
<Rectangle.RenderTransform>
<RotateTransform Angle="240"/>
</Rectangle.RenderTransform>
</Rectangle>
<Rectangle x:Name="r10" Fill="{StaticResource brush}" Opacity="0.5" RenderTransformOrigin="0.5,0.5">
<Rectangle.RenderTransform>
<RotateTransform Angle="270"/>
</Rectangle.RenderTransform>
</Rectangle>
<Rectangle x:Name="r11" Fill="{StaticResource brush}" Opacity="0.5" RenderTransformOrigin="0.5,0.5">
<Rectangle.RenderTransform>
<RotateTransform Angle="300"/>
</Rectangle.RenderTransform>
</Rectangle>
<Rectangle x:Name="r12" Fill="{StaticResource brush}" Opacity="0.5" RenderTransformOrigin="0.5,0.5">
<Rectangle.RenderTransform>
<RotateTransform Angle="330"/>
</Rectangle.RenderTransform>
</Rectangle>
<Grid.Triggers>
<EventTrigger RoutedEvent="Grid.Loaded">
<BeginStoryboard>
<Storyboard RepeatBehavior="Forever">
<DoubleAnimation Storyboard.TargetName="r01" Storyboard.TargetProperty="Opacity" AutoReverse="True" Duration="0:0:0.08333" BeginTime="0:0:0.00000" To="0"/>
<DoubleAnimation Storyboard.TargetName="r02" Storyboard.TargetProperty="Opacity" AutoReverse="True" Duration="0:0:0.08333" BeginTime="0:0:0.08333" To="0"/>
<DoubleAnimation Storyboard.TargetName="r03" Storyboard.TargetProperty="Opacity" AutoReverse="True" Duration="0:0:0.08333" BeginTime="0:0:0.16666" To="0"/>
<DoubleAnimation Storyboard.TargetName="r04" Storyboard.TargetProperty="Opacity" AutoReverse="True" Duration="0:0:0.08333" BeginTime="0:0:0.24999" To="0"/>
<DoubleAnimation Storyboard.TargetName="r05" Storyboard.TargetProperty="Opacity" AutoReverse="True" Duration="0:0:0.08333" BeginTime="0:0:0.33332" To="0"/>
<DoubleAnimation Storyboard.TargetName="r06" Storyboard.TargetProperty="Opacity" AutoReverse="True" Duration="0:0:0.08333" BeginTime="0:0:0.41665" To="0"/>
<DoubleAnimation Storyboard.TargetName="r07" Storyboard.TargetProperty="Opacity" AutoReverse="True" Duration="0:0:0.08333" BeginTime="0:0:0.49998" To="0"/>
<DoubleAnimation Storyboard.TargetName="r08" Storyboard.TargetProperty="Opacity" AutoReverse="True" Duration="0:0:0.08333" BeginTime="0:0:0.58331" To="0"/>
<DoubleAnimation Storyboard.TargetName="r09" Storyboard.TargetProperty="Opacity" AutoReverse="True" Duration="0:0:0.08333" BeginTime="0:0:0.66664" To="0"/>
<DoubleAnimation Storyboard.TargetName="r10" Storyboard.TargetProperty="Opacity" AutoReverse="True" Duration="0:0:0.08333" BeginTime="0:0:0.74997" To="0"/>
<DoubleAnimation Storyboard.TargetName="r11" Storyboard.TargetProperty="Opacity" AutoReverse="True" Duration="0:0:0.08333" BeginTime="0:0:0.83330" To="0"/>
<DoubleAnimation Storyboard.TargetName="r12" Storyboard.TargetProperty="Opacity" AutoReverse="True" Duration="0:0:0.08333" BeginTime="0:0:0.91663" To="0"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Grid.Triggers>
</Grid>
</Grid>
后台代码：
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
}
BackgroundWorker bgMeet;
private void button1_Click(object sender, RoutedEventArgs e)
{
bgMeet = new BackgroundWorker();
//能否报告进度更新
bgMeet.WorkerReportsProgress = true;
//要执行的后台任务
bgMeet.DoWork += new DoWorkEventHandler(bgMeet_DoWork);
//进度报告方法
bgMeet.ProgressChanged += new ProgressChangedEventHandler(bgMeet_ProgressChanged);
//后台任务执行完成时调用的方法
bgMeet.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bgMeet_RunWorkerCompleted);
bgMeet.RunWorkerAsync();//任务启动
}
//执行任务
void bgMeet_DoWork(object sender, DoWorkEventArgs e)
{
//开始播放等待动画
this.Dispatcher.Invoke(new Action(() =>
{
loading.Visibility = System.Windows.Visibility.Visible;
}));
//开始后台任务
GetData();
}
//报告任务进度
void bgMeet_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
this.Dispatcher.Invoke(new Action(() =>
{
this.lab_pro.Content = e.ProgressPercentage + "%";
}));
}
//任务执行完成后更新状态
void bgMeet_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
loading.Visibility = System.Windows.Visibility.Collapsed;
this.Dispatcher.Invoke(new Action(() =>
{
this.lab_pro.Content = "完成";
}));
}
//模拟耗时任务
public void GetData()
{
for (int i = 0; i < 6; i++)
{
bgMeet.ReportProgress(20*i);
System.Threading.Thread.Sleep(400);
}
}
}
