[英]Closing a modal window launched from App.xaml triggers WindowClosing event
I have a WPF application, where as part of the startup, I need to show a modal window to get some informatin from the user. 我有一个WPF应用程序,作为启动的一部分,我需要显示一个模态窗口,以从用户获取一些信息。 I create and show the window from inside App.xaml.cs_ApplicationStartup.
我从App.xaml.cs_ApplicationStartup中创建并显示窗口。 In the window's ok button, I call the Close() method.
在窗口的ok按钮中,我调用Close()方法。 Once the information is retrieved, I want to show the main application window.
检索完信息后,我想显示主应用程序窗口。 However, the main application window immediately received a WindowClosing event and terminates.
但是,主应用程序窗口立即收到WindowClosing事件并终止。 App.xaml code:
App.xaml代码:
private void ApplicationStartup(object sender, StartupEventArgs e)
{
if (Settings.Default.AskForLoginCredentials)
{
var loginWindow = new LoginCredentialsWindow();
bool? retVal = loginWindow.ShowDialog();
if (retVal.HasValue && retVal.Value)
{
string un = loginWindow.UserName;
string pw = loginWindow.Password;
}
else
{
_logger.Info("Credential request prompt was refused. Exiting Application.");
return;
}
}
MainAppWindow window = new MainAppWindow();
window.Show();
}
What is happening here? 这里发生了什么?
Change the Application.ShutdownMode property 更改Application.ShutdownMode属性
The default is OnLastWindowClose
, which means the application will shut down when the last window closes. 默认值为
OnLastWindowClose
,这意味着应用程序将在最后一个窗口关闭时关闭。 The other two options are OnMainWindowClose
and OnExplicitShutdown
另外两个选项是
OnMainWindowClose
和OnExplicitShutdown
I typically use OnExplicitShutdown
, which means Shutdown() needs to be called for the application to exit 我通常使用
OnExplicitShutdown
,这意味着需要调用Shutdown()才能退出应用程序
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