Xamarin ContentPage content refresh on event not working

Question

This may be the main question, but how to get the page to refresh its content (after it has already been loaded)? I am trying to dynamically refresh a page after a web request. The event fires, but it does not seem to refresh the content.

public StartPage : ContentPage
{
    public StartPage()
    {
        var layout = new StackLayout
        {
            Children = 
            {
                new Label { Text = "Preview Page" }
            }
        };

        this.Content = layout;
    }

    //this gets called from a web service call with the text to display
    public void Update(string text)
    {
        var layout = new StackLayout
        {
            Children = 
            {
                new Label { Text = text }
            }
        };

        this.Content = layout;

        //this fires, but nothing changes
        //how can I force the page to refresh??
    }
}

Aplogies for code, if there are errors doing this from memory (I don't have the exact code in front of me)

Answer 1

You should put it inside Device.BeginInvokeOnMainThread()as below

public void Update(string text)
{
  Device.BeginInvokeOnMainThread(() =>
  {
    var layout = new StackLayout
    {
        Children = 
        {
            new Label { Text = text }
        }
    };

    this.Content = layout;
  });
}