private void Spinner_ItemSelected(object sender, AdapterView.ItemSelectedEventArgs e)
        {
            var spinner = sender as Spinner;

            a_cargo_characteristic = spinner.GetItemAtPosition(e.Position).ToString();

            if (a_cargo_characteristic != "Тарно-штучные")
            {
                s_height.Enabled    = false;
                s_width.Enabled     = false;
                s_length.Enabled    = false;
                s_sum_seats.Enabled = false;

                s_height.Text    = "0";
                s_sum_seats.Text = "1";
                s_width.Text     = "0";
                s_length.Text    = "0";

                s_size.Enabled = true;
                SizeInputLayout.SetBackgroundColor(Color.Transparent);

                //s_size.Visibility = ViewStates.Visible;
                //s_size.TextChanged += S_size_TextChanged
            }
            else
            {
                s_height.Enabled    = true;
                s_width.Enabled     = true;
                s_length.Enabled    = true;
                s_sum_seats.Enabled = true;
                s_size.Enabled      = false;
                SizeInputLayout.SetBackgroundResource(Resource.Drawable.StyleInputLayout);
                //s_size.Focusable = false;
                //s_size.Clickable = false;
                //s_size.Enabled = false;
                //s_size.Visibility = ViewStates.Invisible;
                //SizeInputLayout.SetBackgroundResource(Resource.Drawable.StyleInputLayout);
            }
        }