private void BtnDelAll_Click(object sender, RoutedEventArgs e)
{
var result = MsgBox.Show(_mainWindow, "真的要删除全部吗？", _mainWindow.Title, MessageBoxButton.YesNo,
MessageBoxImage.Question);
if (result == MessageBoxResult.Yes)
{
DbOperator.ClearRecent();
UpdateList();
}
}
