/// <summary>
/// 获取终端的编号
/// </summary>
/// <param name="customerID">客户ID</param>
/// <param name="userID">用户ID</param>
/// <param name="unitID">门店ID</param>
/// <param name="posSN">POS序列号</param>
/// <returns></returns>
public string GetPosCode(string customerID, string userID, string unitID, string posSN)
{
PosService pos_service = new PosService();
string pos_code = pos_service.GetPosNo(customerID, unitID, posSN);
return(pos_code);
}