private void btnLogin_Click(object sender, EventArgs e) { DALogin.GetLoginByKorisnickoImeAndLozinka(dsLogin.LoginPodaci, txtKorisnickoIme.Text, txtLozinka.Text); int count = dsLogin.LoginPodaci.Count; if (count == 1) { this.DialogResult = DialogResult.OK; this.Close(); } else { lblError.Visible = true; } }