WPF 异步窗体加载等待

Question

WPF中 做了个Main窗体 由于窗体 数据量大 每次打开的时候都有假死的现象，我想做个异步等待的窗体，启动的时候先弹出Load窗体，在Main窗体完全加载好了再显示Main窗体  如何实现？

Answer 1

楼主 你好，

请参考下面的代码：

        public MainWindow()
        {
            InitializeComponent();
            this.Loaded += MainWindow_Loaded;
        }

        void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            ThreadPool.QueueUserWorkItem((x) => {
                //处理数据
                //同步到UI
                this.Dispatcher.BeginInvoke(new Action(() => {
                    
                }));
            });

        }

谢谢！

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Answer 2

你好！ 我的意思是现在有两个窗体  Initwin 和 mainWin。  Initwin 就是个想进度条一样的等待窗体，启动程序的时候，Initwin 和 mainWin 一起启动，Initwin 监听mainWin ，等mainWin 窗体加载完全了 再显示出来

Answer 3

楼主 你好，

很抱歉一开始理解错你的意图。我创建了一个例子来实现这个需求。首先将APP.XAML中开始窗体 (StartupUri) 删除掉，然后再APP.XAML.CS中添加下面代码，

        BackgroundWorker backgroundWorker = new BackgroundWorker();
        InitailWindow initail = new InitailWindow();
        MainWindow main = null;
        
        public App()
        {
            backgroundWorker.DoWork += backgroundWorker_DoWork;
            backgroundWorker.WorkerReportsProgress = true;
            backgroundWorker.RunWorkerCompleted += backgroundWorker_RunWorkerCompleted;
            backgroundWorker.RunWorkerAsync();
        }

        void backgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            this.Dispatcher.BeginInvoke(new Action(() => 
            {
                main = new MainWindow();
                initail.Hide();
                main.Show();
            }));
        }

        void backgroundWorker_DoWork(object sender, DoWorkEventArgs e)
        {
            this.Dispatcher.BeginInvoke(new Action(() => { initail.Show(); }));
           
            //Do a lot of work
            for(int i =0; i<5; i++)
            {
                Thread.Sleep(1000);
            }
        }

XAML:

<Window x:Class="WPFSplashScreen.InitailWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="InitailWindow" Height="100" Width="300" WindowStartupLocation="CenterScreen" ResizeMode="NoResize">
    <Grid>
        <ProgressBar x:Name="progressBar" IsIndeterminate="True" Width="280" Height="30"/>
    </Grid>
</Window>

我把例子上传至OneDrive中，可以从这里下载。

另外推荐一些资料：

http://code.msdn.microsoft.com/windowsapps/Dynamic-Flash-Screen-in-WPF-6b1f1dc4

http://stackoverflow.com/questions/22026209/wpf-splashscreen-with-progressbar

谢谢！

---

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