[置顶] WPF 后台任务 等待动画 样例

运行效果：



前台代码：

<Window x :Class="Waiting.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x ="http://schemas.microsoft.com/winfx/2006/xaml"
Title="后台忙" Height="94.635" Width="197.361">
<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" />
<!--动画代码，只要填写name属性即可-->
<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="{StaticRes
b22c
ource 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 >
</Window>后台代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
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.Shapes;

namespace Waiting
{
/// <summary>
/// Window1.xaml 的交互逻辑
/// </summary>
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);
}
}
}
}