protected void btnSave_Click(object sender, EventArgs e)
        {
            phMessageError.Visible = false;
            phMessageSuccess.Visible = false;
            lblMessageError.Text = String.Empty;
            lblMessageSuccess.Text = String.Empty;

            if (String.IsNullOrWhiteSpace(txtCityName.Text))
            {
                phMessageError.Visible = true;
                lblMessageError.Text = Resources.Message.city_name_is_mandatory;
                return;
            }

            string mimeType = string.Empty;

            long cityId = !String.IsNullOrWhiteSpace(hdCityId.Value) ? Convert.ToInt64(Commons.SecurityUtils.descriptografar(hdCityId.Value)) : 0;

            using (Lib.Repositories.StateCityRepository repository = new Lib.Repositories.StateCityRepository(ActiveUser))
            {
                Lib.Entities.City city = null;

                if (cityId > 0)
                {
                    //Carrega o cidade existente
                    city = repository.getCityInstanceById(cityId);
                }
                else
                {
                    //Nova cidade
                    city = new Lib.Entities.City();
                }

                city.Name = txtCityName.Text;
                city.StateId = ddlState.SelectedValue;

                repository.saveCity(city);

                if (repository.HasErrors)
                {
                    phMessageError.Visible = true;
                    lblMessageError.Text = String.Join(",", repository.Errors);
                }
                else
                {
                    //Adiciona o responsável
                    if (!String.IsNullOrWhiteSpace(ddlResponsable.SelectedValue))
                    {
                        addResponsable(long.Parse(ddlResponsable.SelectedValue), city.Id);
                    }
                    else
                    {
                        removeResponsable(city.Id);
                    }

                    //Separa os colaboradores adicionados e os removidos
                    updateCollaborators(city.Id);

                    Response.Redirect("~/City/ManageCities.aspx");
                }
            }
        }