public List<setHearingTests> getHearingTestDataBase(string stuID)
 {
     Audiometry aDB = new Audiometry();
     List<setHearingTests> returnValue = new List<setHearingTests>();
     if (int.Parse(aDB._StaffhaveRoles[0]) == 1)
     {
         returnValue= aDB.getHearingTestData(stuID);
     }
     else
     {
         setHearingTests addValue = new setHearingTests();
         addValue.checkNo = _noRole;
         addValue.errorMsg = _errorMsg;
         returnValue.Add(addValue);
     }
     return returnValue;
 }