private void dgvHoteli_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            var id = dgvHoteli.SelectedRows[0].Cells[0].Value;
            frmHoteliDetalji frm = new frmHoteliDetalji(int.Parse(id.ToString()));

            frm.Show();
        }
        private void btnNovihotel_Click(object sender, EventArgs e)
        {
            frmHoteliDetalji frm = new frmHoteliDetalji();

            frm.Show();
        }