private void AddStd_Click(object sender, EventArgs e)
        {
            string name    = FindViewById <EditText>(Resource.Id.dean_newStd_Name).Text;
            int    phone   = int.Parse(FindViewById <EditText>(Resource.Id.dean_newStd_Phone).Text);
            int    group   = int.Parse(FindViewById <EditText>(Resource.Id.dean_newStd_GroupNumber).Text);
            int    year    = int.Parse(FindViewById <EditText>(Resource.Id.dean_newStd_StartYear).Text);
            int    groupId = DataBaseHelper.GetGroupIDByNumberAndYear(group, year);

            Toast.MakeText(Application.Context, name + " " + phone + " " + group + " " + year, ToastLength.Long).Show();

            if (DataBaseHelper.IsServerAlive())
            {
                DataBaseHelper.AddNewStudent(name, groupId, phone);
                Toast.MakeText(this, "New student is added!", ToastLength.Long).Show();
            }
            else
            {
                Toast.MakeText(this, "Server isn't alive", ToastLength.Long).Show();
            }
            Finish();
        }