private void buttonAddStudent_Click(object sender, EventArgs e)
{
var form = new FormStudent();
if (form.ShowDialog() == DialogResult.OK)
{
LoadData();
}
}
private void buttonEditStudent_Click(object sender, EventArgs e)
{
if (controlTree.GetSelectedItem() != null)
{
int id = controlTree.GetSelectedId();
var form = new FormStudent();
form.Id = id;
if (form.ShowDialog() == DialogResult.OK)
{
LoadData();
}
}
}