Question

我有一个WPF应用程序，并且有一个显示图像（启动画面）的按钮，其中包含公司徽标和应用程序开发人员的名称。我希望在用户与任何内容交互之前显示此图像。当用户单击或输入键盘键时，图像必须关闭。请参阅我的代码中的注释行。

private void Info_BeforeCommandExecute(object sender, DevExpress.Xpf.Bars.ItemClickEventArgs e)
{
    SplashScreen SS = new SplashScreen("Images/InfotecSplashScreenInfo.png");
    SS.Show(false);

    // Need to do something here to wait user to click or press any key

    SS.Close(TimeSpan.FromSeconds(1));
}

Answer 1

您可以使用AddKeyDownHandler：

为Keyboard类添加处理程序

private void Info_BeforeCommandExecute(object sender, DevExpress.Xpf.Bars.ItemClickEventArgs e)
{
    SplashScreen SS = new SplashScreen("Images/InfotecSplashScreenInfo.png");
    SS.Show(false);

    KeyEventHandler handler;
    handler = (o,e) =>
    {
          Keyboard.RemoveKeyDownHandler(this, handler);
          SS.Close(TimeSpan.FromSeconds(1));
    };

    Keyboard.AddKeyDownHandler(this, handler);        
}

这将允许您在用户按下某个键后关闭启动画面。

Answer 2

Reed的答案无疑是最简单的，但您也可以完全避免使用SplashScreen，只需使用自定义窗口即可完全控制。

<强> YourCode.cs

private void Info_BeforeCommandExecute(object sender, DevExpress.Xpf.Bars.ItemClickEventArgs e)
{
    SplashWindow SS = new SplashWindow();
    SS.ShowDialog(); // ShowDialog will wait for window to close before continuing
}

<强> SplashWindow.xaml

<Window x:Class="WpfApplication14.SplashWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="SplashWindow" Height="350" Width="525">
    <Grid>
        <!-- Your Image here, I would make a Custom Window Style with no border and transparency etc. -->
        <Button Content="Click Me" Click="Button_Click"/>
    </Grid>
</Window>

<强> SplashWindow.xaml.cs

public partial class SplashWindow : Window
{
    public SplashWindow()
    {
        InitializeComponent();
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        // Once user clicks now we can close the window 
        // and/or add keyboard handler
        this.Close();
    }
}

如何等待点击然后在WPF应用程序中关闭Splashscreen？

2 个答案: