XF 表视图添加和删除行

using System;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;

[assembly: XamlCompilation (XamlCompilationOptions.Compile)]
namespace App31
{
 public partial class App : Application
 {
        TableSection tableSection;
  public App ()
  {
   InitializeComponent();
            var textCell = new TextCell
            {
                Text = "TextCell Text",
                Detail = "TextCell Detail"
            };

            var entryCell = new EntryCell
            {
                Label = "EntryCell",
                Placeholder = "Default Keyboard",
                Keyboard = Keyboard.Default
            };

            tableSection = new TableSection("Table Section 1")
            {
                textCell,entryCell
            };
            var tableView = new TableView
            {
                Intent = TableIntent.Settings,
                Root = new TableRoot("Table Title")
                {
                    tableSection
                }
            };
            MainPage = new ContentPage
            {
                Content = tableView
            };
            var addAction = new MenuItem {Text= "插入操作" };
            var delAction = new MenuItem {Text= "删除操作" };
            addAction.SetBinding(MenuItem.CommandParameterProperty, new Binding("."));
            delAction.SetBinding(MenuItem.CommandParameterProperty, new Binding("."));
            textCell.ContextActions.Add(addAction);
            textCell.ContextActions.Add(delAction);
            addAction.Clicked += AddAction_Clicked;
            delAction.Clicked += DelAction_Clicked;
  }

        private void DelAction_Clicked(object sender, EventArgs e)
        {
            tableSection.RemoveAt(tableSection.Count - 1);
        }

        private void AddAction_Clicked(object sender, EventArgs e)
        {
            var swithCell = new SwitchCell
            {
                Text = "SwitchCell",
                On = true
            };
            tableSection.Add(swithCell);
        }

        protected override void OnStart ()
  {
   // Handle when your app starts
  }

  protected override void OnSleep ()
  {
   // Handle when your app sleeps
  }

  protected override void OnResume ()
  {
   // Handle when your app resumes
  }
 }
}