private async Task<Dictionary<Guid, PhoneLine>> GetPhoneLinesAsync()
{
PhoneCallStore store = await PhoneCallManager.RequestStoreAsync();
// Start the PhoneLineWatcher
var watcher = store.RequestLineWatcher();
var phoneLines = new List<PhoneLine>();
var lineEnumerationCompletion = new TaskCompletionSource<bool>();
watcher.LineAdded += async (o, args) =>
{
var line = await PhoneLine.FromIdAsync(args.LineId);
phoneLines.Add(line);
};
watcher.Stopped += (o, args) => lineEnumerationCompletion.TrySetResult(false);
watcher.EnumerationCompleted += (o, args) => lineEnumerationCompletion.TrySetResult(true);
watcher.Start();
// Wait for enumeration completion
if (!await lineEnumerationCompletion.Task)
{
throw new Exception("Phone Line Enumeration failed");
}
watcher.Stop();
Dictionary<Guid, PhoneLine> returnedLines = new Dictionary<Guid, PhoneLine>();
foreach (PhoneLine phoneLine in phoneLines)
{
if (phoneLine != null && phoneLine.Transport == PhoneLineTransport.Cellular)
{
returnedLines.Add(phoneLine.Id, phoneLine);
}
}
return returnedLines;
}
private async Task<PhoneLine> GetDefaultPhoneLineAsync()
