EntryMoveNextControl.cs

using System;
using System.Runtime.CompilerServices;
using Xamarin.Forms;

namespace samples.core.Controls
{
    public class EntryMoveNextControl : Entry
    {
        public static readonly BindableProperty NextEntryProperty = BindableProperty.Create(nameof(NextEntry), typeof(View), typeof(Entry));
        public View NextEntry
        {
            get => (View)GetValue(NextEntryProperty);
            set => SetValue(NextEntryProperty, value);
        }

        protected override void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            base.OnPropertyChanged(propertyName);

            this.Completed += (sender, e) => 
            {
                this.OnNext();
            };
        }

        public void OnNext()
        {
            NextEntry?.Focus();
        }
    }
}

Thanks a lot, found it very useful. Is it normal for the OnPropertyChanged event to get called one time for each property on each control you have on the page, for instance 4 controls x 4 properties - 16 times? Also, I added a check before the this.Completed part of the event to be called only if the control actually has the property NextEntry set. If not, we return.

Yep - OnPropertyChanged gets called when any property on the page is changed, as far as I'm aware. The above sample was crudely made for a quick blog post I wrote a while back, that has since been made obsolete by the addition of the ReturnType property and the ReturnCommand property in Xamarin.Forms 3.1.
I was young(er) and (more) naive when I wrote this 😃