private void txtCodVeiculo_TextChanged(object sender, EventArgs e) { if (String.IsNullOrWhiteSpace(txtCodVeiculo.Text.Trim()) || !Int32.TryParse(txtCodVeiculo.Text.Trim(), out int i)) { txtVeiculo.Text = ""; return; } txtVeiculo.Text = Veiculo.Buscar(i); }