请尝试以下方法:
AutoClosingMessageBox.Show("Text", "Caption", 1000);
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);
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);
}
更新:
如果希望在超时之前选择某些内容时要获取基础MessageBox的返回值,则可以使用以下版本的代码:
var userResult = AutoClosingMessageBox.Show("Yes or No?", "Caption", 1000, MessageBoxButtons.YesNo);
if(userResult == System.Windows.Forms.DialogResult.Yes) {
}
...
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);
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);
}
另一个更新
我用YesNo
按钮检查了@Jack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AutoclosingMessageBox库的上下文中提供一个修复程序。该库包含重新设计的方法,我认为对某人有用。
也可以通过NuGet包获得:
Install-Package AutoClosingMessageBox
发行说明(v1.0.0.2):
-新的Show(IWin32Owner)API支持大多数流行的场景(在#1的上下文中);
-新的Factory()API提供对MessageBox显示的完全控制;