} // end of method
/// <summary>
/// DeleteTeacher
/// Deletes a Teacher object by its Teacher ID
/// </summary>
/// <param name="id">(int) identifier of the Teacher</param>
public void DeleteTeacher(int id)
{
PersonList data = DataStore.LoadData();
data.RemoveAll(person => person is Teacher && (person as Teacher).ID == id);
DataStore.SaveData();
} // end of method
} // end of method
/// <summary>
/// DeleteStudent
/// Finds a Student by the Person ID and deletes the object
/// </summary>
/// <param name="id">(string) identifier of the Person</param>
public void DeleteStudent(string id)
{
PersonList data = DataStore.LoadData();
data.RemoveAll(person => person is Student && (person as Student).ID == id);
DataStore.SaveData();
} // end of method
} // end of method
/// <summary>
/// GetStudents
/// Finds all the Student objects and
/// returns them as an enumerable object
/// holding all the students
/// </summary>
/// <returns>List<Student> list of student objects</returns>
public List <Student> GetStudents()
{
PersonList data = DataStore.LoadData();
var query = from person in data
let student = person as Student
where student != null
select student;
return(query.ToList());
} // end of method
} // end of method
/// <summary>
/// GetStudent
/// Finds and returns the Student by the Person ID
/// </summary>
/// <param name="id">(string) identifier of the Person</param>
/// <returns>(Student) student object</returns>
public Student GetStudent(string id)
{
PersonList data = DataStore.LoadData();
var query = from person in data
let student = person as Student
where student != null && student.ID == id
select student;
return(query.FirstOrDefault());
} // end of method
} // end of method
/// <summary>
/// GetTeachers()
/// Returns a list of Teacher objects
/// </summary>
/// <returns>(List<Teacher>) teachers</returns>
public List <Teacher> GetTeachers()
{
PersonList data = DataStore.LoadData();
var query = from person in data
let teacher = person as Teacher
where teacher != null
select teacher;
return(query.ToList());
} // end of method
} // end of method
/// <summary>
/// GetTeacher
/// Gets a Teacher object by its Teacher ID
/// </summary>
/// <param name="id">(int) identifier of the Teacher</param>
/// <returns>(Teacher) teacher object</returns>
public Teacher GetTeacher(int id)
{
PersonList data = DataStore.LoadData();
var query = from person in data
let teacher = person as Teacher
where teacher != null && teacher.ID == id
select teacher;
return(query.FirstOrDefault());
} // end of method
} // end of method
/// <summary>
/// Saves the PersonList data
/// </summary>
public static void SaveData()
{
string path = Path.Combine(Path.GetTempPath(), FILENAME);
if (m_Data == null)
{
m_Data = new PersonList();
}
string ser = Serialize(m_Data);
File.WriteAllText(path, ser);
} // end of method
} // end of method
/// <summary>
/// Loads the PersonList from a file
/// </summary>
/// <returns>PersonList data</returns>
public static PersonList LoadData()
{
string path = Path.Combine(Path.GetTempPath(), FILENAME);
if (m_Data == null && File.Exists(path))
{
string ser = File.ReadAllText(path);
m_Data = Deserialize<PersonList>(ser);
}
if (m_Data == null)
{
m_Data = new PersonList();
}
return m_Data;
} // end of method
} // end of method
/// <summary>
/// GetPeople
/// Returns a collection object representing a List<Person>
/// that is a list of Person objects with the last name
/// and first name provided
/// </summary>
/// <param name="lastName">(string) last name of the Person</param>
/// <param name="firstName">(string) first name of the Person</param>
/// <returns>(PersonList) collection of people with the first and last name specified
/// as an input parameter</returns>
public PersonList GetPeople(string lastName, string firstName)
{
PersonList data = DataStore.LoadData();
var query = data.AsQueryable();
if (!string.IsNullOrEmpty(lastName))
{
query = query.Where(p => p.LastName == lastName);
}
if (!string.IsNullOrEmpty(firstName))
{
query = query.Where(p => p.FirstName == firstName);
}
return(new PersonList(query));
} // end of method
/// <summary>
/// AddStudent
/// Accepts all necessary values to create a new Student object
/// </summary>
/// <param name="lastName">(string) last name of the Person</param>
/// <param name="firstName">(string) first name of the Person</param>
/// <param name="dob">(DateTime) date of birth of the Person</param>
/// <param name="gender">(GenderEnum) gender of the Person</param>
/// <param name="id">(string) identifier of the Person</param>
/// <param name="major">(string) major of the Student</param>
/// <param name="units">(float) completed units of the Student</param>
/// <param name="gpa">(float) GPA of the student</param>
/// <returns>Student object</returns>
public Student AddStudent(string lastName, string firstName, DateTime dob, GenderEnum gender, string id, string major, float units, float gpa)
{
PersonList data = DataStore.LoadData();
Student result = null;
Student student = GetStudent(id);
if (student == null)
{
// Student doesn't exist
result = new Student()
{
ID = id, LastName = lastName, FirstName = firstName,
DOB = dob, Gender = gender, Major = major, Units = units, GPA = gpa
};
data.Add(result);
DataStore.SaveData();
}
return(result);
} // end of method
} // end of method
/// <summary>
/// AddTeacher
/// Accepts all necessary values to create a new Teacher object
/// </summary>
/// <param name="lastName">(string) last name of the Person</param>
/// <param name="firstName">(string) first name of the Person</param>
/// <param name="dob">(DateTime) date of birth of the Person</param>
/// <param name="gender">(GenderEnum) gender of the Person</param>
/// <param name="id">(int) identifier of the Teacher</param>
/// <param name="dateofhire">(DateTine) date of hire of the Teacher</param>
/// <param name="salary">(int) salary of the Teacher</param>
/// <returns>(Teacher) teacher object</returns>
public Teacher AddTeacher(string lastName, string firstName, DateTime dob, GenderEnum gender, int idTeacher, DateTime dateofhire, int salary)
{
PersonList data = DataStore.LoadData();
Teacher result = null;
Teacher teacher = GetTeacher(idTeacher);
if (teacher == null)
{
// Teacher doesn't exist, object initialize Teacher
result = new Teacher()
{
LastName = lastName,
FirstName = firstName,
DOB = dob,
Gender = gender,
ID = idTeacher,
DateOfHire = dateofhire,
Salary = salary
};
data.Add(result);
DataStore.SaveData();
} // end of if
return(result);
} // end of method