【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"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

        xmlns:local="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 = ; i < ; i++)

            {

                bgMeet.ReportProgress(i);

                System.Threading.Thread.Sleep();

            }

        }

    }

【转】WPF防止界面卡死并显示加载中效果的相关教程结束。