public async void Run(IBackgroundTaskInstance taskInstance)
{
Debug.WriteLine("task running");
BackgroundTaskDeferral _deferral = taskInstance.GetDeferral();
// Not using this...
var details = (EmailStoreNotificationTriggerDetails)(taskInstance.TriggerDetails);
try
{
UserDataAccountStore store =
await UserDataAccountManager.RequestStoreAsync(UserDataAccountStoreAccessType.AllAccountsReadOnly);
var accts = await store.FindAccountsAsync();
foreach (var acct in accts)
{
foreach (EmailMailbox mailbox in await acct.FindEmailMailboxesAsync())
{
if (mailbox.ChangeTracker.IsTracking == false)
{
mailbox.ChangeTracker.Enable();
}
var changeReader = mailbox.ChangeTracker.GetChangeReader();
var batch = await changeReader.ReadBatchAsync();
Debug.WriteLine($"Num Changes in batch = {batch.Count}");
foreach (var change in batch)
{
Debug.WriteLine($"change type is {change.ChangeType.ToString()}");
foreach (var act in change.MailboxActions)
{
Debug.WriteLine($"kind = {act.Kind}");
Debug.WriteLine($"number = {act.ChangeNumber}");
}
if (change.Message != null)
{
Debug.WriteLine($"subject: {change.Message.Subject}");
}
}
changeReader.AcceptChanges();
}
}
}
catch (Exception ex)
{
Debug.WriteLine($"exception - {ex.Message}");
}
Debug.WriteLine("task triggered");
_deferral.Complete();
}
protected async override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
// 获取当前用户下的全部数据账号
UserDataAccountStore store = await UserDataAccountManager.RequestStoreAsync(UserDataAccountStoreAccessType.AllAccountsReadOnly);
IReadOnlyList <UserDataAccount> accounts = await store.FindAccountsAsync();
lblMsg.Text += string.Join(",", accounts.Select(p => p.UserDisplayName));
lblMsg.Text += Environment.NewLine;
}
private async Task DisplayUserInformationAsync(String id)
{
// Requires the email, contacts, or appointments in the app's manifest
UserDataAccountStore store = await UserDataAccountManager.RequestStoreAsync(UserDataAccountStoreAccessType.AllAccountsReadOnly);
// If the store is null, that means all access to Contacts, Calendar and Email data
// has been revoked.
if (store == null)
{
rootPage.NotifyUser("Access to Contacts, Calendar and Email has been revoked", NotifyType.ErrorMessage);
return;
}
UserDataAccount account = await store.GetAccountAsync(id);
rootPage.NotifyUser("Added account: " + account.UserDisplayName, NotifyType.StatusMessage);
}
private async void OnLoad(object sender, RoutedEventArgs e)
{
var status = await BackgroundExecutionManager.RequestAccessAsync();
Debug.WriteLine($"background execution status = {status}");
// Register background task...
var taskRegistered = false;
var exampleTaskName = "MyEmailBackgroundTask";
foreach (var task in BackgroundTaskRegistration.AllTasks)
{
if (task.Value.Name == exampleTaskName)
{
taskRegistered = true;
break;
}
}
if (taskRegistered == false)
{
var builder = new BackgroundTaskBuilder();
builder.Name = nameof(EmailBackgroundTask);
builder.TaskEntryPoint = typeof(EmailBackgroundTask).ToString();
builder.SetTrigger(new EmailStoreNotificationTrigger());
builder.Register().Completed += EmailTriggered;
}
UserDataAccountStore store =
await UserDataAccountManager.RequestStoreAsync(UserDataAccountStoreAccessType.AllAccountsReadOnly);
var accts = await store.FindAccountsAsync();
foreach (var acct in accts)
{
foreach (EmailMailbox mailbox in await acct.FindEmailMailboxesAsync())
{
//mailbox.MailboxChanged += Mailbox_MailboxChanged;
Debug.WriteLine($"mailbox id {mailbox.DisplayName}");
}
}
}
private async void buttonAdd_Click(object sender, RoutedEventArgs e)
{
// 弹出账号添加界面，如果添加成功会返回新建的数据账号的在本地设备上的唯一标识
string userDataAccountId = await UserDataAccountManager.ShowAddAccountAsync(UserDataAccountContentKinds.Email | UserDataAccountContentKinds.Appointment | UserDataAccountContentKinds.Contact);
if (string.IsNullOrEmpty(userDataAccountId))
{
lblMsg.Text += "用户取消了或添加账号失败";
lblMsg.Text += Environment.NewLine;
}
else
{
UserDataAccountStore store = await UserDataAccountManager.RequestStoreAsync(UserDataAccountStoreAccessType.AllAccountsReadOnly);
if (store != null)
{
// 通过数据账号在本地设备上的唯一标识来获取 UserDataAccount 对象
UserDataAccount account = await store.GetAccountAsync(userDataAccountId);
lblMsg.Text += "新增的数据账号：" + account.UserDisplayName;
}
}
}
// Fill the specified ComboBox with user data accounts.
public async Task LoadDataAccountsAsync(ComboBox comboBox)
{
// Requires the email, contacts, or appointments capability in the app's manifest.
UserDataAccountStore store = await UserDataAccountManager.RequestStoreAsync(UserDataAccountStoreAccessType.AllAccountsReadOnly);
if (store != null)
{
IReadOnlyList <UserDataAccount> userDataAccounts = await store.FindAccountsAsync();
comboBox.DataContext = new ObservableCollection <UserDataAccount>(userDataAccounts);
if (userDataAccounts.Count > 0)
{
comboBox.SelectedIndex = 0;
}
}
else
{
// If the store is null, that means all access to Contacts, Calendar and Email data
// has been revoked.
NotifyUser("Access to Contacts, Calendar and Email has been revoked", NotifyType.ErrorMessage);
}
}
