public void Update(StudentMark studentMark)
{
if (studentMark.Id == 0)
{
cathedraContext.StudentMarks.Add(studentMark);
}
cathedraContext.SaveChanges();
}
private void удалитьToolStripMenuItem_Click(object sender, EventArgs e)
{
if (dataGridView1.SelectedRows.Count > 0)
{
StudentMark studentMark = dataGridView1.SelectedRows[0].DataBoundItem as StudentMark;
DBController.Instance.Remove(studentMark);
UpdateMarks();
}
}
private void редактироватьToolStripMenuItem_Click(object sender, EventArgs e)
{
int course = int.Parse(comboBox2.Text);
int semestr = int.Parse(comboBox1.Text);
if (dataGridView1.SelectedRows.Count > 0)
{
StudentMark studentMark = dataGridView1.SelectedRows[0].DataBoundItem as StudentMark;
NewMarkForm form = new NewMarkForm(student, course, semestr, studentMark);
if (form.ShowDialog() == DialogResult.OK)
{
UpdateMarks();
}
}
}
public NewMarkForm(Student student, int course, int semestr, StudentMark studentMark = null)
{
InitializeComponent();
comboBox1.DataSource = DBController.Instance.Subjects;
this.student = student;
this.semestr = semestr;
this.course = course;
if (studentMark != null)
{
comboBox1.SelectedItem = studentMark.Subject;
numericUpDown1.Value = studentMark.Mark;
this.studentMark = studentMark;
}
}
private void btnOK_Click(object sender, EventArgs e)
{
Subject subject = comboBox1.SelectedItem as Subject;
if (studentMark == null)
{
if (student.Marks.Any(t => t.Subject == subject && t.Semestr == semestr && t.Course == course))
{
MessageBox.Show("Такой предмет уже создан!");
return;
}
studentMark = new StudentMark();
}
studentMark.Subject = subject;
studentMark.Mark = (int)numericUpDown1.Value;
studentMark.Student = student;
studentMark.Semestr = semestr;
studentMark.Course = course;
DBController.Instance.Update(studentMark);
DialogResult = DialogResult.OK;
}
public void Remove(StudentMark studentMark)
{
cathedraContext.StudentMarks.Remove(studentMark);
cathedraContext.SaveChanges();
}