Как вывести данные на экран без использования кнопки?

MainPage.xaml

<StackLayout  >
    <Button Text="ccccccc"  />
    <Label FontSize="Medium" Text="Value" />
    <Label FontSize="Medium" FontAttributes="Bold"   Text="{Binding Value}" />
    <Label FontSize="Medium" Text="Detail" />
    <Label FontSize="Medium" FontAttributes="Bold" Text="{Binding Detail}" />
</StackLayout>

RateInfo.cs

      public class Confirmed
      {
         public int value { get; set; }
         public string detail { get; set; }
      }

RateViewModel.cs

using json_test;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.ComponentModel;
using System.Net.Http;
using System.Windows.Input;
using Xamarin.Forms;

namespace RestApp
{
    public class RateViewModel : INotifyPropertyChanged
    {
        private int value;
        private string detail;

        public int Value
        {
            get { return value; }
            private set
            {
                this.value = value;
                OnPropertyChanged("Value");
            }

        }

        public string Detail
        {
            get { return detail; }
            private set
            {
                detail = value;
                OnPropertyChanged("Detail");
            }
        }

        public ICommand LoadDataCommand { protected set; get; }

        public RateViewModel()
        {
            this.LoadDataCommand = new Command(LoadData);
        }

        private async void LoadData()
        {
            string url = "";

            try
            {
                HttpClient client = new HttpClient();
                client.BaseAddress = new Uri(url);
                var response = await client.GetAsync(client.BaseAddress);
                response.EnsureSuccessStatusCode(); // выброс исключения, если произошла ошибка

                // десериализация ответа в формате json
                var content = await response.Content.ReadAsStringAsync();
                JObject o = JObject.Parse(content);

                var str = o.SelectToken(@"$.confirmed");
                var rateInfo = JsonConvert.DeserializeObject<Confirmed>(str.ToString());

                this.Value = rateInfo.value;
                this.Detail = rateInfo.detail;

            }
            catch (Exception )
            { }
        }

        public event PropertyChangedEventHandler PropertyChanged;
        public void OnPropertyChanged(string prop = "")
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(prop));
        }
    }
}