public bool RemoveDepartment(Department department)        //删除部门
        {
            bool judge = false;

            Department temp = dDAO.SelectDepartment(department.DepartmentNumber);

            if (temp.DepartmentNumber == String.Empty)      //如果数据库中没有该部门
            {
                judge = false;
            }
            else       //数据库内存在该部门
            {
                dDAO.RemoveDepartment(department);
                judge = true;
            }
            return(judge);
        }