private async void Logout_Click(object sender, RoutedEventArgs e)
{
ContentDialog dialog = new ContentDialog
{
Title = "警告",
PrimaryButtonText = "继续",
CloseButtonText = "取消",
Content = "此操作将注销当前账户\r\r可能需要重新输入相关信息，是否继续？",
Background = Application.Current.Resources["DialogAcrylicBrush"] as Brush
};
if ((await dialog.ShowAsync()) != ContentDialogResult.Primary)
{
return;
}
LoadingText.Text = "正在注销...";
LoadingControl.IsLoading = true;
ConnectionCancellation?.Cancel();
await Task.Delay(1000);
ConnectionCancellation?.Dispose();
ConnectionCancellation = null;
DisplayMode.SelectionChanged -= DisplayMode_SelectionChanged;
LastSelectedItem = null;
if (EmailProtocolServiceProvider.CheckWhetherInstanceExist())
{
EmailProtocolServiceProvider.GetInstance().Dispose();
}
EmailService = null;
ApplicationData.Current.LocalSettings.Values["EmailStartup"] = null;
ApplicationData.Current.RoamingSettings.Values["EmailCredentialName"] = null;
ApplicationData.Current.RoamingSettings.Values["EmailCredentialPassword"] = null;
ApplicationData.Current.RoamingSettings.Values["EmailIMAPAddress"] = null;
ApplicationData.Current.RoamingSettings.Values["EmailIMAPPort"] = null;
ApplicationData.Current.RoamingSettings.Values["EmailSMTPAddress"] = null;
ApplicationData.Current.RoamingSettings.Values["EmailSMTPPort"] = null;
ApplicationData.Current.RoamingSettings.Values["EmailEnableSSL"] = null;
ApplicationData.Current.RoamingSettings.Values["EmailCallName"] = null;
LoadingControl.IsLoading = false;
await Task.Delay(700);
EmailAllItemCollection.Clear();
EmailNotSeenItemCollection.Clear();
EmailDisplayCollection?.Clear();
EmailPage.ThisPage.Nav.Navigate(typeof(EmailStartupOne), EmailPage.ThisPage.Nav, new DrillInNavigationTransitionInfo());
NothingDisplayControl.Visibility = Visibility.Visible;
}
/// <summary>
/// 在将要挂起应用程序执行时调用。 在不知道应用程序
/// 无需知道应用程序会被终止还是会恢复，
/// 并让内存内容保持不变。
/// </summary>
/// <param name="sender">挂起的请求的源。</param>
/// <param name="e">有关挂起请求的详细信息。</param>
private void OnSuspending(object sender, SuspendingEventArgs e)
{
//TODO: 保存应用程序状态并停止任何后台活动
SQLite.GetInstance().Dispose();
if (EmailProtocolServiceProvider.CheckWhetherInstanceExist())
{
EmailProtocolServiceProvider.GetInstance().Dispose();
}
}