Help with parameters TextBox / string

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Help with parameters TextBox / string

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#1 by (1 votes)
#2 by (1 votes)

3

I have this method where I would like to bring IBGE. When I put the TextBox as a parameter, it usually comes up, but the problem is that I am using a Library and can not import the TextBox. So I replace the TextBox with a string, but that way it can not bring ... Can someone help me?

public bool recuperarIBGE(string Cidade, string IBGE)
    {
        conexao = new Conexao();

        try
        {
            conexao.conectar();
            conexao.abrirConexao();

            NpgsqlCommand sql = new NpgsqlCommand("SELECT codibge FROM cidade WHERE nome ilike SEM_ACENTO('" + Cidade + "');", conexao.conexao);

            NpgsqlDataReader dr = sql.ExecuteReader();

            while (dr.Read())
            {
                //IBGE.Text = (string)dr["codibge"].ToString();
                IBGE = (string)dr["codibge"].ToString();
                retorno = true;

            }
            conexao.fecharConexao();
        }
        catch (Exception erro)
        {
            throw erro;
        }

        return retorno;
    }

c# string postgresql textbox

asked by anonymous 29.07.2015 / 13:19

2 answers

1

To do this, use the keyword ref or out

out (C # Reference)

ref (C # Reference)

29.07.2015 / 22:44

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score 1 · Accepted Answer

In order for the change in the value in the IBGE parameter to be visible in the code that called the method you must set this parameter to out .

Simply change the method signature to

public bool recuperarIBGE(string Cidade, out string IBGE)

and be sure to assign a value to all method's branch branches.

At the time of calling the method you also need to pass the out modifier in the IBGE parameter:

string ibge;

if (recuperarIBGE("Goiânia", out ibge))
{
    Console.WriteLine("O código IBGE da cidade é" + ibge);
}

In this way, after calling the recuperarIBGE method, the IBGE attribute will have the value that was assigned to it within the method.