protected override void OnBackgroundActivated(BackgroundActivatedEventArgs args)
{
base.OnBackgroundActivated(args);
IBackgroundTaskInstance taskInstance = args.TaskInstance;
var deferral = taskInstance.GetDeferral();
AppServiceTriggerDetails appService = taskInstance.TriggerDetails as AppServiceTriggerDetails;
Debug.WriteLine($"appService.CallerPackageFamilyName: {appService.CallerPackageFamilyName}"); // blank if Excel
if ((string.IsNullOrEmpty(appService.CallerPackageFamilyName)) && (_excelConnection == null))
{
if (_excelConnection != null)
{
ExcelResetConnection();
}
_excelConnection = appService.AppServiceConnection;
_excelConnection.RequestReceived += ExcelOnAppServiceRequestReceived;
_excelConnection.ServiceClosed += ExcelConnectionServiceConnection_ServiceClosed;
_excelAppServiceDeferral = deferral;
taskInstance.Canceled += ExcelOnAppServicesCanceled;
Debug.WriteLine($"Connecting excel Service {_excelConnection.GetHashCode()} {"Excel"}");
}
else
{
if (_dataConnection != null)
{
DataConnectionResetConnection();
}
_dataConnection = appService.AppServiceConnection;
_dataConnection.RequestReceived += DataServiceRequestReceived;
_dataConnection.ServiceClosed += DataServiceConnection_ServiceClosed;
_dataConnectionDeferral = deferral;
taskInstance.Canceled += DataOnAppServicesCanceled;
Debug.WriteLine($"Connecting Data Service {_dataConnection.GetHashCode()} {appService.CallerPackageFamilyName}");
}
}
private async void ExcelOnAppServiceRequestReceived(AppServiceConnection sender, AppServiceRequestReceivedEventArgs args)
{
var messageDeferral = args.GetDeferral();
var request = args.Request;
var m = request.Message;
object command;
m.TryGetValue("Command", out command);
try
{
if (command as string == "Connect")
{
object role;
m.TryGetValue("Role", out role);
if ((role as string) == "DataStreamer")
{
_excelConnection = sender;
Debug.WriteLine($"Connecting Excel: {sender.GetHashCode()}");
}
var response = new ValueSet();
response.Add("Response", "OK");
await request.SendResponseAsync(response);
SendStatusAsync();
}
}
catch (Exception e)
{
Debug.WriteLine($"Exception while sending the response : {e.Message}");
}
finally
{
// Complete the deferral so that the platform knows that we're done responding to the app service call.
// Note for error handling: this must be called even if SendResponseAsync() throws an exception.
messageDeferral.Complete();
}
}