public MessageBoxResult ShowMessageBox(string content, string caption, MessageBoxButton button, MessageBoxImage icon, MessageBoxResult defaultResult, Window owner = null)
{
bool messageBoxClosed = false;
// 由于MessageBox会阻塞主线程
// 需要使用另外一个线程进行操作
Task.Run(() =>
{
IntPtr messageBoxHandle = IntPtr.Zero;
IntPtr activeWindow = IntPtr.Zero;
// 线程启动时可能MessageBox还没弹出，所以需要循环查找
while (messageBoxHandle == IntPtr.Zero || activeWindow != messageBoxHandle)
{
Task.Delay(100);
if (messageBoxClosed)
{
return;
}
// 暂时只能通过名称查找窗口
messageBoxHandle = InteropHelper.FindWindow(null, caption); // 查找对话框窗口
activeWindow = InteropHelper.GetForegroundWindow(); // 查找当前激活窗口，MessageBox会弹出到最前
}
IntPtr defaultButtonHandle = IntPtr.Zero;
string buttonClassName = "Button";
switch (button)
{
case MessageBoxButton.OK:
defaultButtonHandle = InteropHelper.FindWindowEx(messageBoxHandle, IntPtr.Zero, buttonClassName, null);
break;
case MessageBoxButton.OKCancel:
{
IntPtr okHandle = InteropHelper.FindWindowEx(messageBoxHandle, IntPtr.Zero, buttonClassName, null);
if (defaultResult == MessageBoxResult.Cancel)
{
defaultButtonHandle = InteropHelper.FindWindowEx(messageBoxHandle, okHandle, buttonClassName, null);
}
else
{
defaultButtonHandle = okHandle;
}
}
break;
case MessageBoxButton.YesNoCancel:
{
IntPtr yesHandle = InteropHelper.FindWindowEx(messageBoxHandle, IntPtr.Zero, buttonClassName, null);
IntPtr noHandle = InteropHelper.FindWindowEx(messageBoxHandle, yesHandle, buttonClassName, null);
if (defaultResult == MessageBoxResult.Cancel)
{
defaultButtonHandle = InteropHelper.FindWindowEx(messageBoxHandle, noHandle, buttonClassName, null);
}
else if (defaultResult == MessageBoxResult.No)
{
defaultButtonHandle = noHandle;
}
else
{
defaultButtonHandle = yesHandle;
}
}
break;
case MessageBoxButton.YesNo:
{
IntPtr yesHandle = InteropHelper.FindWindowEx(messageBoxHandle, IntPtr.Zero, buttonClassName, null);
if (defaultResult == MessageBoxResult.No)
{
defaultButtonHandle = InteropHelper.FindWindowEx(messageBoxHandle, yesHandle, buttonClassName, null);
}
else
{
defaultButtonHandle = yesHandle;
}
}
break;
default:
break;
}
InteropHelper.GetWindowRect(defaultButtonHandle, out RECT rect); // 获取按钮所在矩形
InteropHelper.SetCursorPos((rect.Left + rect.Right) / 2, (rect.Top + rect.Bottom) / 2); // 设置鼠标位置（按钮中心）
});
MessageBoxResult result = owner == null?
MessageBox.Show(content, caption, button, icon, defaultResult) :
MessageBox.Show(owner, content, caption, button, icon, defaultResult);
messageBoxClosed = true;
return(result);
}