System.Windows.MessageBox不等待用户输入才去噗！ [英] System.Windows.MessageBox doesn't wait for user input before going poof!

问题描述

...这是没有意义的原因。 TT

...and it makes no sense why. T-T

在我的 Application_Startup 事件处理程序我有一些代码看起来有点像这样：

In my Application_Startup event handler I have code that looks kinda like this:

private void Application_Startup(object sender, StartupEventArgs e)
{
    string errorMessage;

    if(CheckStartUpConditions(out errorMessage))
    {
        (new MainWindow()).Show();
    }
    else
    {
        MessageBox.Show(errorMessage, "Application Startup", 
            MessageBoxButton.OK, MessageBoxImage.Error);

        Shutdown();
    }
}

private bool CheckStartUpConditions(out string errorMessage)
{
    errorMessage = string.Empty;  

    if(...)
        errorMessage += "Please login to xxx. ";

    if(...)
        errorMessage += "Please install xxx.";

    if(string.IsNullOrEmpty(errorMessage))
        return true;
    else
        return false;
}

消息框使得像第二层的短暂露面前都要噗！ 它不会等我点击确定或在X按钮。我真的很为难，为什么这正在发生，所以任何帮助会的不胜感激的。

我试着注释掉调用关闭只是踢和笑声，它仍然表现相同方式。

I've tried commenting out the call to Shutdown just for kicks and giggles, and it still behaves the same way.

此外，应用程序也有一个闪屏，所以我不知道这是否影响这一点。

Also, the application also has a SplashScreen, so I don't know if that's effecting this.

编辑：我添加了更多的代码是否有帮助。该消息框显示正确的错误消息。只是不会停留足够长的用户阅读。 >：（

I added more code if that helps. The message box is showing the correct error message. Just won't stay long enough for the users to read it. >:(

编辑第2部分：好吧...我想我已经找到了罪魁祸首:(我改变了我使用的图像生成操作从闪屏我飞溅到无，消息框现在会留下来，等待用户输入，我不明白为什么闪屏与MessageBox的拧>：（

EDIT PART 2: Okay...I think I've found the culprit. :( I changed the build action on the image I'm using as my splash from SplashScreen to None and the message box will now stay and wait for user input. I don't understand why the SplashScreen is screwing with the MessageBox. >:(

推荐答案

尝试使用接受 IWin32Window 参数的重载，并通过空价值使您的MessageBox您的应用程序，它是独立于所有其他窗口可能存在的顶层窗口。我想你的MessageBox得到由闪屏的形式持有。当启动画面关闭时，该框架将关闭消息框，所以让你的MessageBox无主应该做的伎俩。

Try to use an overload that accepts IWin32Window parameter and pass Null value to make your MessageBox a top-level window of your application, which is independent of all other windows that may exist. I guess your MessageBox gets owned by splashscreen form. When splashscreen is closed, the framework closes the MessageBox. So making your MessageBox ownerless should do the trick.

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