private void buttonDelete_Click(object sender, EventArgs e)
{
ClassData classData = new ClassData();
classData.deleteMahasiswa(textBoxNim.Text);
Clear();
dtmhs.DataSource = classData.getAllData();
}
private void buttonUpdate_Click(object sender, EventArgs e)
{
Mahasiswa mhs = new Mahasiswa();
mhs.nim = textBoxNim.Text;
mhs.nama = textBoxNama.Text;
mhs.prodi = textBoxProdi.Text;
mhs.angkatan = textBoxAngkatan.Text;
ClassData classData = new ClassData();
classData.updateDatabase(mhs);
MessageBox.Show("Data successfuly updated");
Clear();
dtmhs.DataSource = classData.getAllData();
}