demo-xf-app-1a/MobileApp1/Views/Content/Login/LoginView.xaml.cs

using MobileApp1.Services;
using System;
using System.Threading.Tasks;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;

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


        public LoginView()
        {
            InitializeComponent();
        }

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

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

                Device.BeginInvokeOnMainThread(() =>
                {
                    loadingIndicatorView1.IsRunning = value;
                    textbox1.IsEnabled = textbox2.IsEnabled = !value;
                    button1.IsEnabled = !value;
                });

            }
        }

        private async void button1_Clicked(object sender, EventArgs e)
        {
            await Task.Run(() =>
            {
                if (this.Parent == null)
                {
                    return;
                }

                ContentPage cp = ContentViewHelper.GetContentPage(this);
                if (cp == null)
                {
                    return;
                }

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

                this.IsBusy = true;

                ServiceResult result = ap.CorporationService.Login(textbox1.Text, textbox2.Text);

                loadingIndicatorView1.Message = result.Message;

                this.IsBusy = false;

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

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


                if (result.IsSuccess)
                {
                    /// part 2
                }

            });
        }

    }
}