// Delete one or all messages.
// The ID of the message to delete is passed as a parameter. An ID of MaxValue
// specifies that all messages should be deleted.
private async Task DoDeleteAsync(uint messageId)
{
// If this is the first request, get the default SMS device. If this
// is the first SMS device access, the user will be prompted to grant
// access permission for this application.
if (device == null)
{
try
{
rootPage.NotifyUser("Getting default SMS device ...", NotifyType.StatusMessage);
device = await SmsDevice.GetDefaultAsync();
}
catch (Exception ex)
{
rootPage.NotifyUser("Failed to find SMS device\n" + ex.Message, NotifyType.ErrorMessage);
return;
}
}
try
{
// Delete one or all messages.
if (messageId < uint.MaxValue)
{
// Verify ID is within range (1 to message store capacity). Note that a SIM
// can have gaps in its message array, so all valid IDs do not necessarily map
// to messages.
if (messageId >= 1 && messageId <= device.MessageStore.MaxMessages)
{
// Delete the selected message asynchronously.
rootPage.NotifyUser("Deleting message ...", NotifyType.StatusMessage);
await device.MessageStore.DeleteMessageAsync(messageId);
rootPage.NotifyUser("Message " + messageId + " deleted", NotifyType.StatusMessage);
}
else
{
rootPage.NotifyUser("Message ID entered is out of range", NotifyType.ErrorMessage);
}
}
else
{
// Delete all messages asynchronously.
rootPage.NotifyUser("Deleting all messages ...", NotifyType.StatusMessage);
await device.MessageStore.DeleteMessagesAsync(SmsMessageFilter.All);
rootPage.NotifyUser("All messages deleted", NotifyType.StatusMessage);
}
}
catch (Exception ex)
{
rootPage.NotifyUser(ex.Message, NotifyType.ErrorMessage);
// On failure, release the device. If the user revoked access or the device
// is removed, a new device object must be obtained.
device = null;
}
}
// Handle request to register the background task
private async void RegisterBackgroundTask_Click(object sender, RoutedEventArgs e)
{
// SMS is a sensitive capability and the user may be prompted for consent. If the app
// does not obtain permission for the package to have access to SMS before the background
// work item is run (perhaps after the app is suspended or terminated), the background
// work item will not have access to SMS and will have no way to prompt the user for consent
// without an active window. Here, any available SMS device is activated in order to ensure
// consent. Your app will likely do something with the SMS device as part of its features.
if (!hasDeviceAccess)
{
try
{
SmsDevice smsDevice = (SmsDevice)await SmsDevice.GetDefaultAsync();
rootPage.NotifyUser("Successfully connnected to SMS device with account number: " + smsDevice.AccountPhoneNumber, NotifyType.StatusMessage);
hasDeviceAccess = true;
}
catch (Exception ex)
{
rootPage.NotifyUser("Failed to find SMS device\n" + ex.Message, NotifyType.ErrorMessage);
return;
}
}
try
{
// Create a new background task builder.
BackgroundTaskBuilder taskBuilder = new BackgroundTaskBuilder();
// Create a new SmsReceived trigger.
SystemTrigger trigger = new SystemTrigger(SystemTriggerType.SmsReceived, false);
// Associate the SmsReceived trigger with the background task builder.
taskBuilder.SetTrigger(trigger);
// Specify the background task to run when the trigger fires.
taskBuilder.TaskEntryPoint = BackgroundTaskEntryPoint;
// Name the background task.
taskBuilder.Name = BackgroundTaskName;
// Register the background task.
BackgroundTaskRegistration taskRegistration = taskBuilder.Register();
// Associate completed event handler with the new background task.
taskRegistration.Completed += new BackgroundTaskCompletedEventHandler(OnCompleted);
UpdateBackgroundTaskUIState(true);
rootPage.NotifyUser("Registered SMS background task", NotifyType.StatusMessage);
}
catch (Exception ex)
{
rootPage.NotifyUser(ex.ToString(), NotifyType.ErrorMessage);
}
}
/// <summary>
/// Initialize SIM device and update UI Labels with result
/// </summary>
private async void InitializeSIM()
{
SmsDevice device;
try
{
device = await SmsDevice.GetDefaultAsync();
ResultLbl.Text = LocRM.GetString("SIMFound");
}
catch (Exception e)
{
ResultLbl.Text = LocRM.GetString("SIMNotFound");
Log.LogError(e.ToString());
}
}
// Handle a request to send a text message.
private async void Send_Click(object sender, RoutedEventArgs e)
{
// If this is the first request, get the default SMS device. If this
// is the first SMS device access, the user will be prompted to grant
// access permission for this application.
if (device == null)
{
try
{
rootPage.NotifyUser("Getting default SMS device ...", NotifyType.StatusMessage);
device = await SmsDevice.GetDefaultAsync();
}
catch (Exception ex)
{
rootPage.NotifyUser("Failed to find SMS device\n" + ex.Message, NotifyType.ErrorMessage);
return;
}
}
try
{
// Convert the entered message from hex to a byte array.
byte[] data;
ParseHexString(PduMessageText.Text, out data);
// Create a binary message and set the data.
SmsBinaryMessage msg = new SmsBinaryMessage();
msg.SetData(data);
// Set format based on the SMS device cellular type (GSM or CDMA)
msg.Format = (device.CellularClass == CellularClass.Gsm) ? SmsDataFormat.GsmSubmit : SmsDataFormat.CdmaSubmit;
// Send message asynchronously.
rootPage.NotifyUser("Sending message ...", NotifyType.StatusMessage);
await device.SendMessageAsync(msg);
rootPage.NotifyUser("Sent message sent in PDU format", NotifyType.StatusMessage);
}
catch (Exception ex)
{
rootPage.NotifyUser(ex.Message, NotifyType.ErrorMessage);
// On failure, release the device. If the user revoked access or the device
// is removed, a new device object must be obtained.
device = null;
}
}
// Handle a request to send a text message.
private async void Send_Click(object sender, RoutedEventArgs e)
{
// If this is the first request, get the default SMS device. If this
// is the first SMS device access, the user will be prompted to grant
// access permission for this application.
if (device == null)
{
try
{
rootPage.NotifyUser("Getting default SMS device ...", NotifyType.StatusMessage);
device = await SmsDevice.GetDefaultAsync();
}
catch (Exception ex)
{
rootPage.NotifyUser("Failed to find SMS device\n" + ex.Message, NotifyType.ErrorMessage);
return;
}
}
try
{
// Create a text message - set the entered destination number and message text.
SmsTextMessage msg = new SmsTextMessage();
msg.To = SendToText.Text;
msg.Body = SendMessageText.Text;
// Send the message asynchronously
rootPage.NotifyUser("Sending message ...", NotifyType.StatusMessage);
await device.SendMessageAsync(msg);
rootPage.NotifyUser("Text message sent", NotifyType.StatusMessage);
}
catch (Exception err)
{
rootPage.NotifyUser(err.Message, NotifyType.ErrorMessage);
// On failure, release the device. If the user revoked access or the device
// is removed, a new device object must be obtained.
device = null;
}
}
// Handle a request to listen for received messages.
private async void Receive_Click(object sender, RoutedEventArgs e)
{
// If this is the first request, get the default SMS device. If this
// is the first SMS device access, the user will be prompted to grant
// access permission for this application.
if (device == null)
{
try
{
rootPage.NotifyUser("Getting default SMS device ...", NotifyType.StatusMessage);
device = await SmsDevice.GetDefaultAsync();
}
catch (Exception ex)
{
rootPage.NotifyUser("Failed to find SMS device\n" + ex.Message, NotifyType.ErrorMessage);
return;
}
}
// Attach a message received handler to the device, if not already listening
if (!listening)
{
try
{
msgCount = 0;
device.SmsMessageReceived += device_SmsMessageReceived;
listening = true;
rootPage.NotifyUser("Waiting for message ...", NotifyType.StatusMessage);
}
catch (Exception ex)
{
rootPage.NotifyUser(ex.Message, NotifyType.ErrorMessage);
// On failure, release the device. If the user revoked access or the device
// is removed, a new device object must be obtained.
device = null;
}
}
}
// Handle a request to read a message.
private async void Read_Click(object sender, RoutedEventArgs e)
{
// If this is the first request, get the default SMS device. If this
// is the first SMS device access, the user will be prompted to grant
// access permission for this application.
if (device == null)
{
try
{
rootPage.NotifyUser("Getting default SMS device ...", NotifyType.StatusMessage);
device = await SmsDevice.GetDefaultAsync();
}
catch (Exception ex)
{
rootPage.NotifyUser("Failed to find SMS device\n" + ex.Message, NotifyType.ErrorMessage);
return;
}
}
// Clear message display.
DateText.Text = "";
ReadFromText.Text = "";
ReadMessageText.Text = "";
try
{
// Parse the message ID - must be number between 1 and maximum message count.
uint id;
if (uint.TryParse(ReadIdText.Text, out id) &&
(id >= 1) && (id <= device.MessageStore.MaxMessages))
{
rootPage.NotifyUser("Reading message ...", NotifyType.StatusMessage);
// Get the selected message from message store asynchronously.
ISmsMessage msg = await device.MessageStore.GetMessageAsync(id);
// See if this is a text message by querying for the text message interface.
ISmsTextMessage textMsg = msg as ISmsTextMessage;
if (textMsg == null)
{
// If it is a binary message then try to convert it to a text message.
if (msg is SmsBinaryMessage)
{
textMsg = SmsTextMessage.FromBinaryMessage(msg as SmsBinaryMessage);
}
}
// Display the text message information.
if (textMsg != null)
{
DateText.Text = textMsg.Timestamp.DateTime.ToString();
ReadFromText.Text = textMsg.From;
ReadMessageText.Text = textMsg.Body;
rootPage.NotifyUser("Message read.", NotifyType.StatusMessage);
}
}
else
{
rootPage.NotifyUser("Invalid ID number entered.", NotifyType.ErrorMessage);
}
}
catch (Exception ex)
{
rootPage.NotifyUser(ex.Message, NotifyType.ErrorMessage);
// On failure, release the device. If the user revoked access or the device
// is removed, a new device object must be obtained.
device = null;
}
}
