I'm using WindowsFormsApplicationBase to show a splash screen. Now, when the main form is created, and errors occur, a messagebox should be shown informing the user. However, the messagebox is displayed under the splash screen, so it's not visible. I need to close the splash screen so I can interact with the user.
The following code will give a cross-thread operation exception :
class SingleInstanceApplication : WindowsFormsApplicationBase
{
private static SingleInstanceApplication instance;
public static void CloseSplash()
{
if (instance.SplashS开发者_如何学Ccreen != null)
instance.SplashScreen.Close();
}
}
Error:
Cross-thread operation not valid: Control 'Splash' accessed from a thread
other than the thread it was created on.
Is this even possible ??
If your splash screen form is named mySplashScreen
:
mySplashScreen.Invoke(new MethodInvoker(delegate {
mySplashScreen.Close();
mySplashScreen.Dispose();
}));
You can't access user interface elements from a thread other than the one that created them. Commonly one can use Control.Invoke to access UI elements from other threads.
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