XF 列表视图分组列表填充

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Xamarin.Forms;

namespace App29
{
 public partial class MainPage : ContentPage
 {
  public MainPage()
  {
   InitializeComponent();

            var states = new List<State>()
            {
                new State("FL")
                {
                    new City{ Name="beijing" },
                     new City{ Name="shanghai"}
                },
                new State("AL")
                {
                     new City{ Name="guangzhou"},
                    new City{ Name="shenzhen"},
                }
              
            };
            var dataTemplate = new DataTemplate(typeof(TextCell));
            dataTemplate.SetBinding(TextCell.TextProperty, "Name");
            myListView.IsGroupingEnabled = true;
            myListView.GroupDisplayBinding = new Binding("Name");
            myListView.GroupShortNameBinding = new Binding("Name");
            //myListView.RowHeight = 100;
            myListView.Header = "这是页眉";
            myListView.Footer = "这是页脚";
            myListView.SeparatorVisibility = SeparatorVisibility.Default;//在windows phone里面默认没有分割线，在android和Ios才有
            myListView.SeparatorColor = Color.Red;
            myListView.ItemTemplate = dataTemplate;
            myListView.ItemsSource = states;
  }
 }
}

 

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;

namespace App29
{
    public class City
    {
        public string Name { get; set; }
    }

    public class State : ObservableCollection<City>
    {
        public State(string name)
        {
            Name = name;
        }
        public string Name { get; set; }
    }
}