Student

Gender must be 'M' or 'F' (and will be converted to upper-case). The student name and program cannot be empty. The student ID must be 9 digits. The GPA must be between 0.0 and 9.0 (inclusive).

Problem Statement

Write the code for the Student class. The class must now ensure that the supplied information is valid. The solution must meet the following requirements (new requirements are in bold):

• Should get and set the student's name, gender, GPA, program of studies, and whether or not the student is full-time.
• Should override the toString() method to get the student's ID and name in this format:
  (ID) Name
• Should no longer allow the student ID to be set (it's only set through the constructor)
• Should reject empty text (and null values) for the student's name and program of studies.
• Should trim the student's name and the program name
• Should only accept 'M' and 'F' as valid genders
• Should set the gender to upper-case
• Should reject negative GPAs and GPAs over 9
• Should require a nine-digit student ID

This class reinforces the idea of encapsulation and constructors. It also demonstrates the idea of overloading the default ToString() method that every class inherits from the Object class.

public class Student
{
    #region Fields
    private string _Name;
    private char _Gender;
    private int _StudentId;
    private string _Program;
    private double _GradePointAverage;
    private bool _IsFullTime;
    #endregion

    #region Properties
    public string Name
    {
        get { return _Name; }
        set
        {
            if (string.IsNullOrEmpty(value) || string.IsNullOrEmpty(value.Trim()))
                throw new System.Exception("Name cannot be empty");
            _Name = value.Trim();
        }
    }

    public char Gender
    {
        get { return _Gender; }
        set
        {
            value = char.ToUpper(value);
            if (value != 'M' && value != 'F')
                throw new Exception("Gender must be M or F");
            _Gender = value;
        }
    }

    public int StudentId
    {
        get { return _StudentId; }
        set
        {
            if (value < 100000000 || value > 999999999)
                throw new Exception("Student Ids must be 9 digits");
            _StudentId = value;
        }
    }

    public string Program
    {
        get { return _Program; }
        set
        {
            if (string.IsNullOrEmpty(value) || string.IsNullOrEmpty(value.Trim()))
                throw new Exception("Program cannot be empty");
            _Program = value.Trim();
        }
    }

    public double GradePointAverage
    {
        get { return _GradePointAverage; }
        set
        {
            if (value < 0 || value > 9)
                throw new System.Exception("GPA must be between 0 and 9 inclusive");
            _GradePointAverage = value;
        }
    }

    public bool IsFullTime
    {
        get { return _IsFullTime; }
        set { _IsFullTime = value; }
    }
    #endregion

    #region Constructors
    public Student(string name, char gender, int studentId, string program, double gradePointAverage, bool isFullTime)
    {
        if (studentId < 100000000 || studentId > 999999999)
            throw new System.Exception("Student Ids must be 9 digits");
        this.Name = name;
        this.Gender = gender;
        this.StudentId = studentId;
        this.Program = program;
        this.GradePointAverage = gradePointAverage;
        this.IsFullTime = isFullTime;
    }
    #endregion

    #region Methods
    public override string ToString()
    {
        return "(" + StudentId + ") " + Name;
    }
    #endregion
}