XF 标签和文本控件

<?xml version="1.0" encoding="utf-8" ?>

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"

             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"

             xmlns:local="clr-namespace:App17"

             x:Class="App17.MainPage">

    <StackLayout>        

        <Label x:Name="myLabel" FontSize="Large" Text="hello" FontAttributes="Italic" TextColor="Accent"></Label>

        <Entry x:Name="myEntry" Placeholder="请输入内容" FontSize="Medium" FontAttributes="Bold" PlaceholderColor="DimGray" IsPassword="True"></Entry>

    </StackLayout>

</ContentPage>

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using Xamarin.Forms;

namespace App17

{

    public partial class MainPage : ContentPage

    {

        public MainPage()

        {

            InitializeComponent();

            myEntry.Completed += (s, e) => 

            {

                Entry entry = (Entry)s;

                myLabel.Text = entry.Text;

            };

           myEntry.TextChanged += (s, e) => 

           {

               Entry entry = (Entry)s;

               myLabel.Text = entry.Text;

           };

        }

    }

}