强制 MessageBox 位于 .net/WPF 中的应用程序窗口顶部 [英] Force MessageBox to be on top of application window in .net/WPF

问题描述

在我的 WPF 应用程序中，我有时会启动一个 System.Windows.MessageBox.当它最初显示时，它会显示在我的主应用程序窗口的顶部，就像我想要的那样.有没有办法可以强制它始终保持在主窗口的顶部?我遇到的问题是，当显示 MessageBox 时，用户可以单击主应用程序窗口并将其带到前面，这意味着 MessageBox 会从视图中隐藏.在这种情况下，用户可能没有意识到它的存在，或者忘记了它，对他们来说，主应用程序似乎已经冻结了.

In my WPF app, I sometimes being up a System.Windows.MessageBox. When it is initially displayed, it is shown on top of my main application window, as I would like. Is there a way that I can force it to ALWAYS remain top of the main window? The problem I have is that when a MessageBox is displayed, users can then click on the main app window and bring it to the front, meaning the MessageBox becomes hidden from view. In this case the user might not realize it's there, or forget about it, and to them, the main app seems to have frozen.

我已经阅读了很多关于此的主题，但没有一个为我解决问题.

I've read a number of threads about this, but none have resolved the problem for me.

我应该补充一点，放置 MessageBox 的线程可能不是 UI 线程.谢谢汤姆

I ought to add that the thread putting up the MessageBox might not be the UI thread. Thanks Tom

推荐答案

使用 MessageBox.Show 的版本，它接受一个窗口所有者"并传递你的窗口.

Use the version of MessageBox.Show that takes a Window "owner" and pass your window.

MessageBox.Show(Application.Current.MainWindow, "Im always on top - of the main window");

如果您可能不在 UI 线程上，请尝试:

If your possibly not on the UI thread try:

string msg="Hello!";
if (Application.Current.Dispatcher.CheckAccess()) {
    MessageBox.Show(Application.Current.MainWindow, msg);
}
else {
    Application.Current.Dispatcher.Invoke(DispatcherPriority.Normal, new Action(()=>{
        MessageBox.Show(Application.Current.MainWindow, msg);
    }));
}

您可以:
1. Invoke 阻塞你的线程，直到 MessageBox 被解除 OR
2. BeginInvoke 在这种情况下，您的线程代码将继续执行，但 UI 线程将在 MessageBox 上阻塞，直到其被解除).

You can:
1. Invoke to block your thread until MessageBox is dismissed OR
2. BeginInvoke in which case your thread code will continue to execute but UI thread will block on MessageBox until its dismissed).

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