how can i refresh the datas in the GridView after i update the value? Winform

string kayitguncelle = "UPDATE Kisi SET IDGrup=@IDGrup,ogrNo=@ogrNo,Adi=@Adi,SoyAdi=@SoyAdi,Telefon=@Telefon,VeliAd=@VeliAd,VeliTel=@VeliTel,Adres=@Adres";
cmd = new OleDbCommand(kayitguncelle, baglanti);
baglanti.Open();
cmd.Parameters.Add("@IDGrup", OleDbType.Integer).Value = IDGrup;
cmd.Parameters.Add("@ogrNo", OleDbType.Char, 50).Value = ogrNo;
cmd.Parameters.Add("@Adi", OleDbType.Char, 50).Value = Adi;
cmd.Parameters.Add("@SoyAdi", OleDbType.Char, 50).Value = SoyAdi;
cmd.Parameters.Add("@Telefon", OleDbType.Char, 50).Value = Telefon;
cmd.Parameters.Add("@VeliAd", OleDbType.Char, 50).Value = VeliAd;
cmd.Parameters.Add("@VeliTel", OleDbType.Char, 50).Value = VeliTel;
cmd.Parameters.Add("@Adres", OleDbType.Char, 50).Value = Adres;



try
{

    cmd.ExecuteNonQuery();
    ((MainForm)Application.OpenForms["MainForm"]).grd.Refresh();

    MessageBox.Show("Succesful...blabla");
    baglanti.Close();


}