public VolunteerVM(CallBack _callback1, CallBack _callback2, CallBack _callback3) { db = new Database(Database.connectStr); callback1 = _callback1; callback2 = _callback2; callback3 = _callback3; acquirerId = (App.Current as App).UserId; acquirerInfo = (App.Current as App).Userinfo; //client.GetResidentsAsync(acquirerId); // client.GetAcquirerInfoAsync(acquirerId); // client.GetAcquirerInfoCompleted += new EventHandler<GetAcquirerInfoCompletedEventArgs>(client_GetAcquirerInfoCompleted); client.GetResidents_VAsync(acquirerId); client.GetItems_VCompleted += new EventHandler <GetItems_VCompletedEventArgs>(client_GetItems_VCompleted); client.GetResidents_VCompleted += new EventHandler <GetResidents_VCompletedEventArgs>(client_GetResidents_VCompleted); }