demo-xf-app-1a/MobileApp1/Views/WelcomePage.xaml.cs

using System;
using System.Threading.Tasks;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;

namespace MobileApp1.Views
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class WelcomePage : ContentPage
    {
        protected bool isBusy = false;


        public WelcomePage()
        {
            InitializeComponent();
        }

        protected override void OnAppearing()
        {
            base.OnAppearing();

            LoadPage();
        }

        private bool IsBusy
        {
            get => isBusy;
            set
            {
                isBusy = value;

                //LoginPage cp = (LoginPage)ContentViewHelper.GetParentElement<LoginPage>(this);
                //if (cp != null)
                //{
                //    cp.IsBusy = value;
                //}

                Device.BeginInvokeOnMainThread(() =>
                {
                    loadingIndicatorView1.IsRunning = value;
                    panel1.IsVisible = !value;
                });

            }
        }


        private async void button1_Clicked(object sender, EventArgs e)
        {
            await Task.Run(() =>
            {
                ContentPageHelper.SetDetailPage(this, typeof(MyFoldersPage));
            });
        }


        private async void LoadPage()
        {
            await Task.Run(() =>
            {
                if (this.Parent == null)
                {
                    return;
                }

                App ap = ContentPageHelper.GetApp(this);
                if (ap == null)
                {
                    return;
                }

                IsBusy = true;

                WelcomePackResult result = ap.CorporationService.RetrieveWelcomePack();

                loadingIndicatorView1.Message = result.Message;

                IsBusy = false;

                //ContentViewHelper.SetMainPage(this, new AppShell());

                //await cp.DisplayAlert("Clicked", "Login", "OK");


                if (result.IsSuccess)
                {

                    Device.BeginInvokeOnMainThread(() =>
                    {
                        label1.Text = string.Format("Hi, {0}.", ap.CorporationService.DisplayName);
                        label2.Text = string.Format("You have {0} notice{1}", ((result.NoticesCount <= 0) ? "no": result.NoticesCount.ToString()), ((result.NoticesCount == 1) ? "" : "s"));
                        label3.Text = string.Format("You have {0} message{1}", ((result.MessagesCount <= 0) ? "no": result.MessagesCount.ToString()), ((result.MessagesCount == 1) ? "" : "s"));
                    });
                }

            });
        }

    }
}