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wpf软件启动时，加载启动页面。软件初始化完成之后关闭页面。

App.xaml.cs代码 （实现加载页面功能）

public partial class App : Application
    {
        protected override void OnStartup(StartupEventArgs e)
        {
            var thread = new Thread(new ThreadStart(() =>
            {
                WpfApplication1.MainWindow.window = new Window1();
                WpfApplication1.MainWindow.window.Show();
                WpfApplication1.MainWindow.window.Activate();
                System.Windows.Threading.Dispatcher.Run();
            }));
            thread.SetApartmentState(ApartmentState.STA);
            thread.IsBackground = true;
            thread.Start();
            base.OnStartup(e);
        }
    }

MainWindow.cs

public partial class MainWindow : Window
    {
        public static Window1 window = null;
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            Thread.Sleep(1000*10);

            if (window != null)
            {
                window.Dispatcher.BeginInvoke((Action) (() =>
                {
                    window.Close();
                }));
            }
        }
    }

启动页面

<Window x:Class="WpfApplication1.Window1"
        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:WpfApplication1"
        mc:Ignorable="d" WindowStartupLocation="CenterScreen" 
        Title="Window1" Height="300" Width="300" WindowStyle="None" MouseLeftButtonDown="Window_MouseLeftButtonDown">
    <Grid>
        <Image Name="splashScreenImage" Stretch="Fill" Grid.Row="0" Source="pp.jpg" />
        <Canvas Height="120" HorizontalAlignment="Center" RenderTransformOrigin="0.5,0.5" VerticalAlignment="Center" Width="120">
            <Canvas.RenderTransform>
                <RotateTransform x:Name="SpinnerRotate" Angle="0" />
            </Canvas.RenderTransform>
            <Canvas.Triggers>
                <EventTrigger RoutedEvent="FrameworkElement.Loaded">
                    <BeginStoryboard>
                        <BeginStoryboard.Storyboard>
                            <Storyboard>
                                <DoubleAnimation Duration="0:0:2" From="0" RepeatBehavior="Forever" Storyboard.TargetName="SpinnerRotate" Storyboard.TargetProperty="(RotateTransform.Angle)" To="360" />
                            </Storyboard>
                        </BeginStoryboard.Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Canvas.Triggers>
            <Ellipse Canvas.Left="47.2783" Canvas.Top="0.5" Fill="Orange" Height="21.862" Opacity="1" Stretch="Fill" Width="21.835" />
            <Ellipse Canvas.Left="20.1696" Canvas.Top="9.76358" Fill="Orange" Height="21.862" Opacity="0.9" Stretch="Fill" Width="21.835" />
            <Ellipse Canvas.Left="2.86816" Canvas.Top="29.9581" Fill="Orange" Height="21.862" Opacity="0.8" Stretch=&quo