Android

namespace MobileApplication
{
    public  partial class ListaCriteriosAdapter : BaseAdapter<Criterio>
    {
        IList<Criterio> ListaCriterios;
        private Context activity;
        private LayoutInflater MiInflanter;
        MobileService.MobileService Query = new MobileService.MobileService();

        public ListaCriteriosAdapter(Context context, IList<Criterio> MiLista)
        {
            this.activity = context;
            ListaCriterios = MiLista;
            MiInflanter = (LayoutInflater)activity.GetSystemService(Context.LayoutInflaterService);
        }

        public override int Count
        {
            get { return ListaCriterios.Count; }
        }

        public override long GetItemId(int position)
        {
            return position;
        }

        public override Criterio this[int position]
        {
            get { return ListaCriterios[position]; }
        }

        public override View GetView(int position, View convertView, ViewGroup parent)
        {
            ContactsViewHolder Holder = null;
            ImageView btnDelete;

            if (convertView == null)
            {
                convertView = MiInflanter.Inflate(Resource.Layout.ListViewCriterios, null);
                Holder = new ContactsViewHolder();

                Holder.txtFolio = convertView.FindViewById<TextView>(Resource.Id.TVFolioListaCriterios);
                Holder.txtCriterio = convertView.FindViewById<TextView>(Resource.Id.TVCriterioListaCriterios);
                Holder.txtTipo = convertView.FindViewById<TextView>(Resource.Id.TVTipoListaCriterios);
                btnDelete = convertView.FindViewById<ImageView>(Resource.Id.BTNBorrarCriterio);

                btnDelete.Click += (object sender, EventArgs e) =>
                {
                    AlertDialog.Builder builder = new AlertDialog.Builder(activity);
                    AlertDialog Confirm = builder.Create();

                    Confirm.SetTitle("Confirmar");
                    Confirm.SetMessage("Estas seguro de eliminarlo?");
                    Confirm.SetButton("Aceptar", (s, ev) =>
                    {
                        var Temp = (int)((sender as ImageView).Tag);
                        int id = (Int32)ListaCriterios[Temp].IdCriterio;

                        ListaCriterios.RemoveAt(Temp);

                        EliminarCriterioPP((Int32)id);
                        NotifyDataSetChanged();
                    });

                    Confirm.Show();

                };

                convertView.Tag = Holder;
                btnDelete.Tag = position;
            }
            else
            {
                btnDelete = convertView.FindViewById<ImageView>(Resource.Id.BTNBorrarCriterio);
                Holder = convertView.Tag as ContactsViewHolder;
                btnDelete.Tag = position;
            }

            Holder.txtFolio.Text = ListaCriterios[position].IdCriterio.ToString();
            Holder.txtCriterio.Text = ListaCriterios[position].DescripcionCriterio.ToString();
            Holder.txtTipo.Text = ListaCriterios[position].DescripcionGrafico;
            NotifyDataSetChanged();
            return convertView;
        }

        public class ContactsViewHolder : Java.Lang.Object
        {
            public TextView txtFolio { get; set; }
            public TextView txtCriterio { get; set; }
            public TextView txtTipo { get; set; }
        }

        private void EliminarCriterioPP(int Id)
        {
            Query.EliminarCriterioPPCompleted += Query_EliminarCriterioPPCompleted;
            Query.EliminarCriterioPPAsync(Id);
        }

        void Query_EliminarCriterioPPCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
        {
            Toast.MakeText(activity, "Fue eliminado correctamente", ToastLength.Short).Show();
        }
    }
}