protected override void OnAppearing()
        {
            if (Content == null)
            {
                //monta a tela de loading
                Content = ViewTemplate.GetLoadingView("Carregando", "Por favor aguarde...");
                Task.Delay(1000);

                if (oFields == null)
                {
                    return;
                }

                TableView oTableView = new TableView();
                oTableView.Intent        = TableIntent.Form;
                oTableView.RowHeight     = 50;
                oTableView.HasUnevenRows = true;

                TableRoot oTableRoot = new TableRoot();

                TableSection oTableSectionCurrent = new TableSection();



                string cGroupAux = "";
                foreach (var oField in oFields)
                {
                    //se mudou o grupo
                    if (!cGroupAux.Equals(oField.GroupTitle))
                    {
                        //adiciona uma nova sessao
                        cGroupAux            = oField.GroupTitle;
                        oTableSectionCurrent = new TableSection(oField.GroupTitle);
                        oTableRoot.Add(oTableSectionCurrent);
                    }

                    switch (oField.FieldType)
                    {
                    case FieldTypeEnum.Image:
                        oTableSectionCurrent.Add(ViewTemplate.GetImageCell(oField));
                        break;

                    case FieldTypeEnum.Text:
                        oTableSectionCurrent.Add(ViewTemplate.GetTextCell(oField));
                        break;

                    case FieldTypeEnum.Switch:
                        oTableSectionCurrent.Add(ViewTemplate.GetSwitchCell(oField));
                        break;

                    case FieldTypeEnum.Entry:
                        oTableSectionCurrent.Add(ViewTemplate.GetEntryCell(oField));
                        break;

                    case FieldTypeEnum.DatePicker:
                        oTableSectionCurrent.Add(ViewTemplate.GetDatePickerCell(oField));
                        break;

                    case FieldTypeEnum.TimePicker:
                        oTableSectionCurrent.Add(ViewTemplate.GetTimePickerCell(oField));
                        break;

                    case FieldTypeEnum.Picker:
                        oTableSectionCurrent.Add(ViewTemplate.GetPickerCell(oField));
                        break;

                    case FieldTypeEnum.Slider:
                        oTableSectionCurrent.Add(ViewTemplate.GetSliderCell(oField));
                        break;

                    case FieldTypeEnum.Number:
                        oTableSectionCurrent.Add(ViewTemplate.GetNumberCell(oField));
                        break;
                    }
                }

                oTableView.Root = oTableRoot;
                Content         = oTableView;
                this.ToolbarItems.Clear();
                this.ToolbarItems.Add(new ToolbarItem()
                {
                    Text = "Gravar", Order = ToolbarItemOrder.Primary, Command = new Command(ToolbarItemCommand), CommandParameter = "1"
                });
                this.ToolbarItems.Add(new ToolbarItem()
                {
                    Text = "Documento", Order = ToolbarItemOrder.Primary, Command = new Command(ToolbarItemDocumentCommand), CommandParameter = "1"
                });
            }

            base.OnAppearing();
        }