UWP保存网页到本地

布局文件

<Page
    x:Class="webrequestWeb.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:webrequestWeb"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">


    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <StackPanel>
            <WebView Name="web" Height="340"/>
            <Button Name="btn" Height="40" Width="360"
                    Margin="10" Click="btn_Click"
                    HorizontalAlignment="Center"
                    />
        </StackPanel>
    </Grid>
</Page>

代码

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Storage;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;


//“空白页”项模板在 http://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409 上有介绍


namespace webrequestWeb
{
    /// <summary>
    /// 可用于自身或导航至 Frame 内部的空白页。
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }


        private async void btn_Click(object sender, RoutedEventArgs e)
        {
            var local = ApplicationData.Current.LocalFolder;
            var localStorageFolder = await local.CreateFolderAsync("File", CreationCollisionOption.OpenIfExists);
            var file = await localStorageFolder.CreateFileAsync("web.html",CreationCollisionOption.ReplaceExisting);
            var url = "http://www.baidu.com";


            List<Byte> allbytes = new List<byte>();
            using (var response = await WebRequest.Create(url).GetResponseAsync())
            {
                using (Stream responseStream = response.GetResponseStream())
                {
                    byte[] buffer = new byte[4000];
                    int bytesRead = 0;
                    while ((bytesRead = await responseStream.ReadAsync(buffer, 0, 4000)) > 0)
                    {
                        allbytes.AddRange(buffer.Take(bytesRead));
                    }
                }
            }
            await FileIO.WriteBytesAsync(file, allbytes.ToArray());

//测试是否保存好，直接用webview显示出来
            var webStringTemp = await FileIO.ReadTextAsync(file);
            var webString = webStringTemp.ToString();
            web.NavigateToString(webString);
        }
    }
}