private void clear_data_lcd() { m_txt_so_tien_lcd.Text = ""; m_txt_ghi_chu_lcd.Text = ""; m_sle_chon_ly_do_chinh_sua_so_tien_lcd.EditValue = null; m_sle_chuc_danh_lcd.EditValue = null; m_sle_muc_lcd.EditValue = null; }