void Delete()
{
data2 dt = db.data2.Where(p => p.mahieucongto == et_mact.Text).SingleOrDefault();
db.data2.Remove(dt);
db.SaveChanges();
}
void Edit()
{
int id1 = Convert.ToInt32(datagridview2.SelectedCells[0].OwningRow.Cells["STT"].Value.ToString());
data2 dt = db.data2.Find(id1);
dt.fullname = et_name.Text;
dt.thon = et_thon.Text;
dt.matram = et_tram.Text;
dt.dong = et_ctdong.Text;
dt.pha = et_ctpha.Text;
dt.mahieucongto = et_mact.Text;
dt.ngaykiemdinh = dt_dky.DateTime;
dt.hankiemdinh = dt_hhan.DateTime;
dt.ghichu = et_ghichu.Text;
db.SaveChanges();
}
void Add()
{
{
data2 dt = new data2()
{
fullname = et_name.Text,
thon = et_thon.Text,
matram = et_tram.Text,
dong = et_ctdong.Text,
pha = et_ctpha.Text,
mahieucongto = et_mact.Text,
ngaykiemdinh = dt_dky.DateTime,
hankiemdinh = dt_hhan.DateTime,
ghichu = et_ghichu.Text
};
db.data2.Add(dt);
db.SaveChanges();
}
}