protected override void button1_Click(object sender, EventArgs e)
{
FrmStudentEdit frm = new FrmStudentEdit();
frm.ShowDialog();
refresh();
}
protected override void button2_Click(object sender, EventArgs e)
{
Students std = (Students)dataGridView1.SelectedRows[0].DataBoundItem;
FrmStudentEdit frm = new FrmStudentEdit(std);
frm.ShowDialog();
refresh();
}