private void BtnAddStudent_Click(object sender, EventArgs e)
{
Student stu = new Student()
{
FirstName = txtFirstName.Text,
LastName = txtLastName.Text,
ProgramOfChoice = txtProgram.Text,
DateOfBirth = dtpDateOfBirth.Value
};
try
{
if (existingStudent != null)
{
stu.StudentId = existingStudent.StudentId;
StudentDB.Update(stu);
MessageBox.Show("Student updated!");
}
else
{
StudentDB.Add(stu);
MessageBox.Show("Student added!");
}
Close();
}
catch (SqlException ex)
{
MessageBox.Show("There was a problem with the database, try again later");
#if DEBUG //preprocessor directive
MessageBox.Show(ex.Message);
#endif
}
}
private void PopulateStudentListBox()
{
List <Student> students = StudentDB.GetAllStudents();
//Ordering the students in alphabetical order
students = students.OrderBy(stu => stu.FirstName).ToList();
//Databinding - internally loops through and adds each student
lstStudents.DataSource = students;
lstStudents.DisplayMember = nameof(Student.FullName);
}
private void BtnDeleteStudent_Click(object sender, EventArgs e)
{
//If no student selected, tell user and break out of method
if (lstStudents.SelectedIndex < 0)
{
MessageBox.Show("Please choose a student!");
return;
}
Student stu = lstStudents.SelectedItem as Student;
string msg = $"Are you sure you want to delete {stu.StudentId} : {stu.FullName}. \n {stu.DateOfBirth.ToShortDateString()}\n{stu.ProgramOfChoice}.";
DialogResult answer = MessageBox.Show(msg, "Delete Student?", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
if (answer == DialogResult.Yes)
{
if (StudentDB.Delete(stu.StudentId))
{
PopulateStudentListBox();
MessageBox.Show("Student deleted successfully");
}
}
}