private void btnAdd_Click(object sender, EventArgs e)
{
frmEditContact frmEdit = new frmEditContact(null, sv.ID, null);
frmEdit.ShowDialog();
loadData();
}
private void btnEdit_Click(object sender, EventArgs e)
{
DanhBa d = bdsContact.Current as DanhBa;
frmEditContact frmEdit = new frmEditContact(d, null, d.ID);
frmEdit.ShowDialog();
loadData();
}