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[ASP.net教程]【转】WPF防止界面卡死并显示加载中效果

原文地址:http://www.cnblogs.com/linyijia/archive/2013/02/06/2900609.html

<Window x:Class="LoadingTest.MainWindow"    ="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    ="http://schemas.microsoft.com/winfx/2006/xaml"    ="http://schemas.microsoft.com/expression/blend/2008"    ="http://schemas.open    ="clr-namespace:LoadingTest"    mc:Ignorable="d"    Title="MainWindow" Height="350" Width="525">  <Grid>    <Button Content="Button" Height="23" HorizontalAlignment="Left" Margin="41,20,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click" />    <DataGrid AutoGenerateColumns="False" Height="99" HorizontalAlignment="Left" Margin="40,70,0,0" Name="dataGrid1" VerticalAlignment="Top" Width="441" />    <Canvas Name="loading" RenderTransformOrigin="0.5,0.5" Visibility="Collapsed" HorizontalAlignment="Center" VerticalAlignment="Center" Width="120" Height="120" Margin="187,76,241,85">      <Ellipse Width="15" Height="15" Canvas.Left="55" Canvas.Top="31" Stretch="Fill" Fill="#FFD1D1F7" Opacity="1.0"/>      <Ellipse Width="15" Height="15" Canvas.Left="38" Canvas.Top="39" Stretch="Fill" Fill="Blue" Opacity="0.8"/>      <Ellipse Width="15" Height="15" Canvas.Left="36" Canvas.Top="58" Stretch="Fill" Fill="#FF0000FE" Opacity="0.7"/>      <Ellipse Width="15" Height="15" Canvas.Left="52" Canvas.Top="67" Stretch="Fill" Fill="Blue" Opacity="0.6"/>      <Ellipse Width="15" Height="15" Canvas.Left="68" Canvas.Top="61" Stretch="Fill" Fill="#FF2E2EFF" Opacity="0.5"/>      <Ellipse Width="15" Height="15" Canvas.Left="69" Canvas.Top="42" Stretch="Fill" Fill="#FF6F6FFF" Opacity="0.4"/>      <Canvas.RenderTransform>        <RotateTransform x:Name="SpinnerRotate" Angle="0" />      </Canvas.RenderTransform>      <Canvas.Triggers>        <EventTrigger RoutedEvent="ContentControl.Loaded">          <BeginStoryboard>            <Storyboard>              <DoubleAnimation Storyboard.TargetName="SpinnerRotate" Storyboard.TargetProperty="(RotateTransform.Angle)" From="0" To="360" Duration="0:0:0.8" RepeatBehavior="Forever" />            </Storyboard>          </BeginStoryboard>        </EventTrigger>      </Canvas.Triggers>    </Canvas>    <Label Name="lab_pro" Content="Label" Height="28" Margin="140,14,315,239" />  </Grid></Window>

public partial class MainWindow : Window  {    public MainWindow()    {      InitializeComponent();    }    BackgroundWorker bgMeet;    private void button1_Click(object sender, RoutedEventArgs e)    {      bgMeet = new BackgroundWorker();      bgMeet.WorkerReportsProgress = true;      bgMeet.DoWork += new DoWorkEventHandler(bgMeet_DoWork);      bgMeet.ProgressChanged += new ProgressChangedEventHandler(bgMeet_ProgressChanged);      bgMeet.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bgMeet_RunWorkerCompleted);      bgMeet.RunWorkerAsync();    }    void bgMeet_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)    {      loading.Visibility = System.Windows.Visibility.Collapsed;      this.Dispatcher.Invoke(new Action(() =>      {        this.lab_pro.Content = "完成";      }));    }    void bgMeet_ProgressChanged(object sender, ProgressChangedEventArgs e)    {      this.Dispatcher.Invoke(new Action(() =>      {        this.lab_pro.Content = e.ProgressPercentage;      }));    }    void bgMeet_DoWork(object sender, DoWorkEventArgs e)    {      this.Dispatcher.Invoke(new Action(() =>      {        loading.Visibility = System.Windows.Visibility.Visible;      }));      GetData();    }    public void GetData()    {      for (int i = 0; i < 11; i++)      {        bgMeet.ReportProgress(i);        System.Threading.Thread.Sleep(500);      }    }  }