C# 几秒钟后关闭 MessageBox

Question

提问by Kiquenet

I have a Windows Forms application VS2010 C# where I display a MessageBox for show a message.

我有一个 Windows 窗体应用程序 VS2010 C#，我在其中显示一个 MessageBox 以显示消息。

I have an okay button, but if they walk away, I want to timeout and close the message box after lets say 5 seconds, automatically close the message box.

我有一个好的按钮，但是如果他们走开，我想超时并在说 5 秒后关闭消息框，自动关闭消息框。

There are custom MessageBox (that inherited from Form) or another reporter Forms, but it would be interesting not necessary a Form.

有自定义 MessageBox（从 Form 继承）或其他报告器 Forms，但有趣的是不需要 Form。

Any suggestions or samples about it?

有什么建议或样品吗？

Updated:

更新：

For WPF
Automatically close messagebox in C#

对于 WPF
在 C# 中自动关闭消息框

Custom MessageBox (using Form inherit)
http://www.codeproject.com/Articles/17253/A-Custom-Message-Box

自定义 MessageBox（使用 Form 继承）
http://www.codeproject.com/Articles/17253/A-Custom-Message-Box

http://www.codeproject.com/Articles/327212/Custom-Message-Box-in-VC

http://tutplusplus.blogspot.com.es/2010/07/c-tutorial-create-your-own-custom.html

http://medmondson2011.wordpress.com/2010/04/07/easy-to-use-custom-c-message-box-with-a-configurable-checkbox/

Scrollable MessageBox
A Scrollable MessageBox in C#

可滚动消息框
C# 中的可滚动消息框

Exception Reporter
https://stackoverflow.com/questions/49224/good-crash-reporting-library-in-c-sharp

异常报告器
https://stackoverflow.com/questions/49224/good-crash-reporting-library-in-c-sharp

http://www.codeproject.com/Articles/6895/A-Reusable-Flexible-Error-Reporting-Framework

Solution:

解决方案：

Maybe I think the following answers are good solution, without use a Form.

也许我认为以下答案是很好的解决方案，无需使用表单。

https://stackoverflow.com/a/14522902/206730
https://stackoverflow.com/a/14522952/206730

Answer 1

采纳答案by DmitryG

Try the following approach:

尝试以下方法：

AutoClosingMessageBox.Show("Text", "Caption", 1000);

Where the AutoClosingMessageBoxclass implemented as following:

当AutoClosingMessageBox类实现如下：

public class AutoClosingMessageBox {
    System.Threading.Timer _timeoutTimer;
    string _caption;
    AutoClosingMessageBox(string text, string caption, int timeout) {
        _caption = caption;
        _timeoutTimer = new System.Threading.Timer(OnTimerElapsed,
            null, timeout, System.Threading.Timeout.Infinite);
        using(_timeoutTimer)
            MessageBox.Show(text, caption);
    }
    public static void Show(string text, string caption, int timeout) {
        new AutoClosingMessageBox(text, caption, timeout);
    }
    void OnTimerElapsed(object state) {
        IntPtr mbWnd = FindWindow("#32770", _caption); // lpClassName is #32770 for MessageBox
        if(mbWnd != IntPtr.Zero)
            SendMessage(mbWnd, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
        _timeoutTimer.Dispose();
    }
    const int WM_CLOSE = 0x0010;
    [System.Runtime.InteropServices.DllImport("user32.dll", SetLastError = true)]
    static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
    [System.Runtime.InteropServices.DllImport("user32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto)]
    static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);
}

Update:If you want to get the return value of the underlying MessageBox when user selects something before the timeout you can use the following version of this code:

更新：如果您想在用户在超时之前选择某些内容时获取底层 MessageBox 的返回值，您可以使用此代码的以下版本：

var userResult = AutoClosingMessageBox.Show("Yes or No?", "Caption", 1000, MessageBoxButtons.YesNo);
if(userResult == System.Windows.Forms.DialogResult.Yes) { 
    // do something
}
...
public class AutoClosingMessageBox {
    System.Threading.Timer _timeoutTimer;
    string _caption;
    DialogResult _result;
    DialogResult _timerResult;
    AutoClosingMessageBox(string text, string caption, int timeout, MessageBoxButtons buttons = MessageBoxButtons.OK, DialogResult timerResult = DialogResult.None) {
        _caption = caption;
        _timeoutTimer = new System.Threading.Timer(OnTimerElapsed,
            null, timeout, System.Threading.Timeout.Infinite);
        _timerResult = timerResult;
        using(_timeoutTimer)
            _result = MessageBox.Show(text, caption, buttons);
    }
    public static DialogResult Show(string text, string caption, int timeout, MessageBoxButtons buttons = MessageBoxButtons.OK, DialogResult timerResult = DialogResult.None) {
        return new AutoClosingMessageBox(text, caption, timeout, buttons, timerResult)._result;
    }
    void OnTimerElapsed(object state) {
        IntPtr mbWnd = FindWindow("#32770", _caption); // lpClassName is #32770 for MessageBox
        if(mbWnd != IntPtr.Zero)
            SendMessage(mbWnd, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
        _timeoutTimer.Dispose();
        _result = _timerResult;
    }
    const int WM_CLOSE = 0x0010;
    [System.Runtime.InteropServices.DllImport("user32.dll", SetLastError = true)]
    static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
    [System.Runtime.InteropServices.DllImport("user32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto)]
    static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);
}

Yet another Update

又一个更新

I have checked the @Hyman's case with YesNobuttons and discovered that the approach with sending the WM_CLOSEmessage does not work at all.
I will provide a fixin the context of the separate AutoclosingMessageBoxlibrary. This library contains redesigned approach and, I believe, can be useful to someone.
It also available via NuGet package:

我用YesNo按钮检查了@Hyman 的情况，发现发送WM_CLOSE消息的方法根本不起作用。
我将在单独的AutoclosureMessageBox库的上下文中提供修复。这个库包含重新设计的方法，我相信对某人有用。它也可以通过NuGet 包获得：

Install-Package AutoClosingMessageBox

Release Notes (v1.0.0.2):
- New Show(IWin32Owner) API to support most popular scenarios (in the context of #1);
- New Factory() API to provide full control on MessageBox showing;

发行说明 (v1.0.0.2)：
- 新的 Show(IWin32Owner) API 以支持最流行的场景（在#1的上下文中）；
- 新的 Factory() API 提供对 MessageBox 显示的完全控制；

Answer 2

回答by jAC

There is an codeproject project avaliable HEREthat provides this functuanility.

有一个CodeProject上项目avaliable这里提供此functuanility。

Following many threads here on SO and other boards this cant be done with the normal MessageBox.

在 SO 和其他板上遵循许多线程，这是无法使用普通 MessageBox 完成的。

Edit:

编辑：

I have an idea that is a bit ehmmm yeah..

我有一个想法，有点 ehmmm 是的..

Use a timer and start in when the MessageBox appears. If your MessageBox only listens to the OK Button (only 1 possibility) then use the OnTick-Event to emulate an ESC-Press with SendKeys.Send("{ESC}");and then stop the timer.

使用计时器并在 MessageBox 出现时开始。如果您的 MessageBox 只监听 OK 按钮（只有 1 种可能性），则使用 OnTick-Event 模拟 ESC-Press，SendKeys.Send("{ESC}");然后停止计时器。

Answer 3

回答by Jens Granlund

You could try this:

你可以试试这个：

[DllImport("user32.dll", EntryPoint="FindWindow", SetLastError = true)]
static extern IntPtr FindWindowByCaption(IntPtr ZeroOnly, string lpWindowName);

[DllImport("user32.Dll")]
static extern int PostMessage(IntPtr hWnd, UInt32 msg, int wParam, int lParam);

private const UInt32 WM_CLOSE = 0x0010;

public void ShowAutoClosingMessageBox(string message, string caption)
{
    var timer = new System.Timers.Timer(5000) { AutoReset = false };
    timer.Elapsed += delegate
    {
        IntPtr hWnd = FindWindowByCaption(IntPtr.Zero, caption);
        if (hWnd.ToInt32() != 0) PostMessage(hWnd, WM_CLOSE, 0, 0);
    };
    timer.Enabled = true;
    MessageBox.Show(message, caption);
}

Answer 4

回答by FastAl

AppActivate!

应用激活！

If you don't mind muddying your references a bit, you can include Microsoft.Visualbasic,and use this very short way.

如果您不介意稍微混淆您的参考文献，您可以包含Microsoft.Visualbasic,和使用这种非常简短的方式。

Display the MessageBox

显示消息框

    (new System.Threading.Thread(CloseIt)).Start();
    MessageBox.Show("HI");

CloseIt Function:

关闭功能：

public void CloseIt()
{
    System.Threading.Thread.Sleep(2000);
    Microsoft.VisualBasic.Interaction.AppActivate( 
         System.Diagnostics.Process.GetCurrentProcess().Id);
    System.Windows.Forms.SendKeys.SendWait(" ");
}

Now go wash your hands!

现在去洗手！

Answer 5

回答by Esge

The System.Windows.MessageBox.Show() method has an overload which takes an owner Window as the first parameter. If we create an invisible owner Window which we then close after a specified time, it's child message box would close as well.

System.Windows.MessageBox.Show() 方法有一个重载，它将所有者 Window 作为第一个参数。如果我们创建一个不可见的所有者窗口，然后在指定时间后关闭它，它的子消息框也会关闭。

Window owner = CreateAutoCloseWindow(dialogTimeout);
MessageBoxResult result = MessageBox.Show(owner, ...

So far so good. But how do we close a window if the UI thread is blocked by the message box and UI controls can't be accessed from a worker thread? The answer is - by sending a WM_CLOSE windows message to the owner window handle:

到现在为止还挺好。但是，如果 UI 线程被消息框阻塞并且无法从工作线程访问 UI 控件，我们如何关闭窗口？答案是 - 通过向所有者窗口句柄发送 WM_CLOSE windows 消息：

Window CreateAutoCloseWindow(TimeSpan timeout)
{
    Window window = new Window()
    {
        WindowStyle = WindowStyle.None,
        WindowState = System.Windows.WindowState.Maximized,
        Background =  System.Windows.Media.Brushes.Transparent, 
        AllowsTransparency = true,
        ShowInTaskbar = false,
        ShowActivated = true,
        Topmost = true
    };

    window.Show();

    IntPtr handle = new WindowInteropHelper(window).Handle;

    Task.Delay((int)timeout.TotalMilliseconds).ContinueWith(
        t => NativeMethods.SendMessage(handle, 0x10 /*WM_CLOSE*/, IntPtr.Zero, IntPtr.Zero));

    return window;
}

And here is the import for the SendMessage Windows API method:

这是 SendMessage Windows API 方法的导入：

static class NativeMethods
{
    [DllImport("user32.dll", CharSet = CharSet.Auto)]
    public static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);
}

Answer 6

回答by BSharp

A solution that works in WinForms:

一个适用于 WinForms 的解决方案：

var w = new Form() { Size = new Size(0, 0) };
Task.Delay(TimeSpan.FromSeconds(10))
    .ContinueWith((t) => w.Close(), TaskScheduler.FromCurrentSynchronizationContext());

MessageBox.Show(w, message, caption);

Based on the effect that closing the form that owns the message box will close the box as well.

基于关闭拥有消息框的表单也会关闭该框的效果。

Windows Forms controls have a requirement that they must be accessed on the same thread that created them. Using TaskScheduler.FromCurrentSynchronizationContext()will ensure that, assuming that the example code above is executed on the UI thread, or an user-created thread. The example will not work correctly if the code is executed on a thread from a thread pool (e.g. a timer callback) or a task pool (e.g. on a task created with TaskFactory.StartNewor Task.Runwith default parameters).

Windows 窗体控件要求必须在创建它们的同一线程上访问它们。TaskScheduler.FromCurrentSynchronizationContext()假设上面的示例代码在 UI 线程或用户创建的线程上执行，使用将确保。如果代码是在来自线程池（例如计时器回调）或任务池（例如使用TaskFactory.StartNew或Task.Run使用默认参数创建的任务）的线程上执行的，则该示例将无法正常工作。

Answer 7

回答by kayleeFrye_onDeck

RogerBover at CodeProject has one of the slickest solutions to this answer, and he did that back in '04, and it's still bangin'

CodeProject 的 RogerB对这个答案提出了最巧妙的解决方案之一，他在 04 年就这样做了，现在仍然很成功

Basically, you go here to his project and download the CS file. In case that link ever dies, I've got a backup gisthere. Add the CS file to your project, or copy/paste the code somewhere if you'd rather do that.

基本上，您到这里访问他的项目并下载 CS 文件。万一该链接失效，我在这里有一个备份要点。将 CS 文件添加到您的项目中，或者如果您愿意，可以将代码复制/粘贴到某处。

Then, all you'd have to do is switch

然后，你所要做的就是切换

DialogResult result = MessageBox.Show("Text","Title", MessageBoxButtons.CHOICE)

to

到

DialogResult result = MessageBoxEx.Show("Text","Title", MessageBoxButtons.CHOICE, timer_ms)

And you're good to go.

你很高兴去。

Answer 8

回答by Greg Wittmeyer

There is an undocumented API in user32.dll named MessageBoxTimeout() but it requires Windows XP or later.

在名为 MessageBoxTimeout() 的 user32.dll 中有一个未公开的 API，但它需要 Windows XP 或更高版本。

Answer 9

回答by OnWeb

DMitryG's code "get the return value of the underlying MessageBox" has a bug so the timerResult is never actually correctly returned (MessageBox.Showcall returns AFTER OnTimerElapsedcompletes). My fix is below:

DMitryG 的代码“获取底层的返回值MessageBox”有一个错误，因此 timerResult 从未真正正确返回（MessageBox.Show调用OnTimerElapsed完成后返回）。我的修复如下：

public class TimedMessageBox {
    System.Threading.Timer _timeoutTimer;
    string _caption;
    DialogResult _result;
    DialogResult _timerResult;
    bool timedOut = false;

    TimedMessageBox(string text, string caption, int timeout, MessageBoxButtons buttons = MessageBoxButtons.OK, DialogResult timerResult = DialogResult.None)
    {
        _caption = caption;
        _timeoutTimer = new System.Threading.Timer(OnTimerElapsed,
            null, timeout, System.Threading.Timeout.Infinite);
        _timerResult = timerResult;
        using(_timeoutTimer)
            _result = MessageBox.Show(text, caption, buttons);
        if (timedOut) _result = _timerResult;
    }

    public static DialogResult Show(string text, string caption, int timeout, MessageBoxButtons buttons = MessageBoxButtons.OK, DialogResult timerResult = DialogResult.None) {
        return new TimedMessageBox(text, caption, timeout, buttons, timerResult)._result;
    }

    void OnTimerElapsed(object state) {
        IntPtr mbWnd = FindWindow("#32770", _caption); // lpClassName is #32770 for MessageBox
        if(mbWnd != IntPtr.Zero)
            SendMessage(mbWnd, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
        _timeoutTimer.Dispose();
        timedOut = true;
    }

    const int WM_CLOSE = 0x0010;
    [System.Runtime.InteropServices.DllImport("user32.dll", SetLastError = true, CharSet = System.Runtime.InteropServices.CharSet.Auto)]
    static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
    [System.Runtime.InteropServices.DllImport("user32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto)]
    static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);
}

Answer 10

回答by Kaven Wu

use EndDialoginstead of sending WM_CLOSE:

使用EndDialog而不是发送WM_CLOSE：

[DllImport("user32.dll")]
public static extern int EndDialog(IntPtr hDlg, IntPtr nResult);

C# 几秒钟后关闭 MessageBox

提问by Kiquenet

采纳答案by DmitryG

回答by jAC

回答by Jens Granlund

回答by FastAl

AppActivate!

应用激活！

回答by Esge

回答by BSharp

回答by kayleeFrye_onDeck

回答by Greg Wittmeyer

回答by OnWeb

回答by Kaven Wu

相关推荐

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标签

C# 几秒钟后关闭 MessageBox

提问by Kiquenet

采纳答案by DmitryG

回答by jAC

回答by Jens Granlund

回答by FastAl

AppActivate!

应用激活！

回答by Esge

回答by BSharp

回答by kayleeFrye_onDeck

回答by Greg Wittmeyer

回答by OnWeb

回答by Kaven Wu

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