private void button_Click(object sender, RoutedEventArgs e)
        {
            int    high, low, pul;
            double tempD;

            int.TryParse(highPres.Text, out high);
            int.TryParse(lowPres.Text, out low);
            int.TryParse(pulse.Text, out pul);
            double.TryParse(temp.Text, out tempD);
            LifeFuncMeasure measures = new LifeFuncMeasure {
                Temp = tempD, HighPressure = high, LowPressure = low, Pulse = pul, Date = DateTime.Now
            };

            DataSources.AddMeasure(measures);
            Frame.Navigate(typeof(MainPage));
        }