Doubt to Load Combobox from an account with the sub account

Question

I made a select to fetch an account and upload the sub account and would like your opinion to see if this is how you do it

code

    private void cbbConta_SelectedIndexChanged(object sender, EventArgs e)
    {

        PlanoContasDTO objPlanoConta = new PlanoContasDTO();

        objPlanoConta.DescricaoPlanoContas = cbbConta.Text;

        objPlanoConta = new PlanoContasModel().PesqContaNome(objPlanoConta);

        int conta = objPlanoConta.CodConta;

        CarregarSubContaCombo(conta);
    }

follow the screenshots of the screen

Choose the consumer account

Choosing the Account sub-account

so far this account is right R=Revenue and does not appear in expenses

Answer 1

Denilson Carlos, try to take the increment of cbbConta.Selectedindex +1.

  private void cbbConta_SelectedIndexChanged(object sender, EventArgs e)
{ 
    codContaSelec = cbbConta.SelectedIndex ;
   // codContaSelec = Convert.ToInt32(conta);
    CarregarSubContaCombo(codContaSelec);
}