My select is not generating result

I'm doing a select, this same select tested in the database returns me the information I need, but in my .net code an error is saying that it is not generating a result, what will I be doing wrong

var NomeFuncionario = conexao.executeSelect("TB_FUNCIONARIO","NOME","ID_FUNCIONARIO="+teste1);
if (NomeFuncionario.Read())
    lblNome.Text = NomeFuncionario.GetSqlChars(0).ToString(); 

function code:

public SqlDataReader executeSelect(String sTabela, String sCampos, String sWhereClause) 
{ 
    try {   
        string query = " SET DATEFORMAT dmy SELECT " + sCampos + " FROM " + sTabela;    
        if (!(sWhereClause.Equals("")))
            query = query + " WHERE " + sWhereClause;

        sqlcmd = new SqlCommand(query, getConnection());

        return sqlcmd.ExecuteReader();
    }
    catch (ApplicationException e)
    {
        throw new ApplicationException("App_Code/conexao/executeSelect", e);
    }
}