protected async Task RefreshPayments()
        {
            if (CrossConnectivity.Current.IsConnected)
            {
                try
                {
                    App_activity_indicator.IsVisible = true;
                    App_activity_indicator.IsRunning = true;
                    string webaddress = Libraries.MobileConfig.GetWebAddress(Application.Current.Properties["campus"].ToString()) + string.Format("DataFinder.aspx?dataFormat=reghistory&regno={0}", Application.Current.Properties["userno"]);
                    var    content    = await _client.GetStringAsync(webaddress);

                    MyDB DB = new MyDB();

                    if (content != "[]")
                    {
                        DB.resetRegistration();
                        DB.AddRegistration(content);
                    }
                    else
                    {
                        await DisplayAlert("Error! ", "No Results Found", "OK");
                    }
                    App_activity_indicator.IsVisible = false;
                    App_activity_indicator.IsRunning = false;
                }
                catch (Exception)
                {
                    App_activity_indicator.IsVisible = false;
                    App_activity_indicator.IsRunning = false;
                }
            }
            else
            {
                //await DisplayAlert("IUIU Mobile ", "No Connection. Saved Data will be used", "OK");
            }
        }