private void Button1_Click(object sender, EventArgs e)
{
StudentChange studentForm = new StudentChange();
List <Specialty> specialties = db.Specialties.ToList();
studentForm.comboBox1.DataSource = specialties;
studentForm.comboBox1.ValueMember = "Id";
studentForm.comboBox1.DisplayMember = "Name";
DialogResult result = studentForm.ShowDialog(this);
if (result == DialogResult.Cancel)
{
return;
}
Student student = new Student();
student.FIO = studentForm.textBox1.Text.ToString();
student.adress = studentForm.textBox2.Text;
student.Phone = Convert.ToInt32(studentForm.textBox3.Text);
student.Year = Convert.ToInt32(studentForm.textBox4.Text);
student.Specialty = (Specialty)studentForm.comboBox1.SelectedItem;
db.Students.Add(student);
db.SaveChanges();
MessageBox.Show("Новый студент добавлен");
}
private void Button2_Click(object sender, EventArgs e)
{
if (dataGridView1.SelectedRows.Count > 0)
{
int index = dataGridView1.SelectedRows[0].Index;
int id = 0;
bool converted = Int32.TryParse(dataGridView1[0, index].Value.ToString(), out id);
if (converted == false)
{
return;
}
Student student = db.Students.Find(id);
StudentChange studentChange = new StudentChange();
studentChange.textBox1.Text = student.FIO;
studentChange.textBox2.Text = student.adress;
studentChange.textBox3.Text = student.Phone.ToString();
studentChange.textBox4.Text = student.Year.ToString();
studentChange.comboBox1.SelectedItem = student.Specialty;
List <Specialty> specialties = db.Specialties.ToList();
studentChange.comboBox1.DataSource = specialties;
studentChange.comboBox1.ValueMember = "Id";
studentChange.comboBox1.DisplayMember = "Name";
if (student.Specialty != null)
{
studentChange.comboBox1.SelectedValue = student.Specialty.Id;
}
DialogResult result = studentChange.ShowDialog(this);
if (result == DialogResult.Cancel)
{
return;
}
student.FIO = studentChange.textBox1.Text.ToString();
student.adress = studentChange.textBox2.Text;
student.Phone = Convert.ToInt32(studentChange.textBox3.Text);
student.Year = Convert.ToInt32(studentChange.textBox4.Text);
student.Specialty = (Specialty)studentChange.comboBox1.SelectedItem;
db.Entry(student).State = EntityState.Modified;
db.SaveChanges();
MessageBox.Show("Объект обновлен");
}
}