private void btnConfirmar_Click(object sender, RoutedEventArgs e)
        {
            if (cmbProjeto.SelectedIndex < 0 || cmbSprint.SelectedIndex < 0 ||
                txtData.Text.Length == 0 || txtUpload.Text.Length == 0)
            {
                Alerta alerta = new Alerta("Favor preencher todos os campos");
                alerta.Show();
            }
            else
            {
                TarefaDAO       tDAO      = new TarefaDAO();
                List <DateTime> listaData = tDAO.recuperarListaDatasPorString(recuperarSprint());

                bool upload = true;
                foreach (DateTime data in listaData)
                {
                    if (Convert.ToDateTime(txtData.Text).Equals(data))
                    {
                        upload = false;
                        break;
                    }
                }

                if (upload == true)
                {
                    realizarUpload(txtUpload.Text);
                }
                else
                {
                    AlertaUpload alerta = new AlertaUpload(this, txtUpload.Text, recuperarSprint(), txtData.Text);
                    alerta.Show();
                }
            }
        }