<Pagex:Class="Windows10.Controls.WebViewDemo.WebViewDemo5"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:local="using:Windows10.Controls.WebViewDemo"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"mc:Ignorable="d"><Grid Background="Transparent"><StackPanel Margin="10 0 10 10"><Button Name="btnCapture" Content="对此 WebView 中的当前内容截图" Click="btnCapture_Click" Margin="5" /><WebView Name="webView" Width="400" Height="300" Source="http://webabcd.cnblogs.com/" HorizontalAlignment="Left" Margin="5" /><StackPanel Margin="5" Orientation="Horizontal"><Image Name="imageOriginal" Width="400" Height="300" HorizontalAlignment="Left" /><Image Name="imageThumbnail" Width="400" Height="300" HorizontalAlignment="Left" Margin="10 0 0 0" /></StackPanel></StackPanel></Grid>
</Page>

/** WebView - 内嵌浏览器控件（继承自 FrameworkElement, 请参见 /Controls/BaseControl/FrameworkElementDemo/）*     CapturePreviewToStreamAsync() - 对 WebView 当前显示的内容截图，并将图片写入指定的流*     *     * 本例用于演示如何对 WebView 中的内容截图*/using System;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Threading.Tasks;
using Windows.Graphics.Imaging;
using Windows.Storage.Streams;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Media.Imaging;namespace Windows10.Controls.WebViewDemo
{public sealed partial class WebViewDemo5 : Page{public WebViewDemo5(){this.InitializeComponent();}private async void btnCapture_Click(object sender, RoutedEventArgs e){// 对 WebView 中的内容截图，并将原始图像数据放入内存流InMemoryRandomAccessStream ms = new InMemoryRandomAccessStream();await webView.CapturePreviewToStreamAsync(ms);// 显示原始截图BitmapImage bitmapImage = new BitmapImage();bitmapImage.SetSource(ms);imageOriginal.Source = bitmapImage;// 定义缩略图的大小（最长边定义为 180）int longlength = 180, width = 0, height = 0;double srcwidth = webView.ActualWidth, srcheight = webView.ActualHeight;double factor = srcwidth / srcheight;if (factor < 1){height = longlength;width = (int)(longlength * factor);}else{width = longlength;height = (int)(longlength / factor);}// 显示原始截图的缩略图BitmapSource thumbnail = await resize(width, height, ms);imageThumbnail.Source = thumbnail;}// 将指定的图片修改为指定的大小，并返回修改后的图片private async Task<BitmapSource> resize(int width, int height, IRandomAccessStream source){WriteableBitmap thumbnail = new WriteableBitmap(width, height);BitmapDecoder decoder = await BitmapDecoder.CreateAsync(source);BitmapTransform transform = new BitmapTransform();transform.ScaledHeight = (uint)height;transform.ScaledWidth = (uint)width;PixelDataProvider pixelData = await decoder.GetPixelDataAsync(BitmapPixelFormat.Bgra8,BitmapAlphaMode.Straight,transform,ExifOrientationMode.RespectExifOrientation,ColorManagementMode.DoNotColorManage);pixelData.DetachPixelData().CopyTo(thumbnail.PixelBuffer);return thumbnail;}}
}

<Pagex:Class="Windows10.Controls.WebViewDemo.WebViewDemo6"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:local="using:Windows10.Controls.WebViewDemo"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"mc:Ignorable="d"><Grid Background="Transparent"><StackPanel Margin="10 0 10 10"><Button Name="btnShare" Content="通过 Share Contract 分享 WebView 中的被选中的内容（如果没有选中任何内容，则分享网页地址）" Click="btnShare_Click" Margin="5" /><WebView Name="webView" Width="400" Height="300" Source="http://webabcd.cnblogs.com/" HorizontalAlignment="Left" Margin="5" /></StackPanel></Grid>
</Page>

/** WebView - 内嵌浏览器控件（继承自 FrameworkElement, 请参见 /Controls/BaseControl/FrameworkElementDemo/）*     CaptureSelectedContentToDataPackageAsync() - 将选中的内容转换为 DataPackage 对象*     DataRequested - 分享操作开始时触发的事件（事件参数 DataRequestedEventArgs）* * DataRequestedEventArgs*     GetDeferral() - 获取异步操作对象，同时开始异步操作，之后通过 Complete() 通知完成异步操作* * * 本例用于演示如何通过 Share Contract 分享 WebView 中的被选中的内容（如果没有选中任何内容，则分享网页地址）*/using System;
using Windows.ApplicationModel.DataTransfer;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;namespace Windows10.Controls.WebViewDemo
{public sealed partial class WebViewDemo6 : Page{private DataTransferManager _dataTransferManager;public WebViewDemo6(){this.InitializeComponent();}private void btnShare_Click(object sender, RoutedEventArgs e){_dataTransferManager = DataTransferManager.GetForCurrentView();_dataTransferManager.DataRequested += _dataTransferManager_DataRequested;DataTransferManager.ShowShareUI();}// 分享 WebView 中的被选中的内容async void _dataTransferManager_DataRequested(DataTransferManager sender, DataRequestedEventArgs args){DataRequest request = args.Request;DataRequestDeferral deferral = args.Request.GetDeferral();// 如果 dataPackage 是 null 的话，则说明用户没有选择任何内容DataPackage dataPackage = await webView.CaptureSelectedContentToDataPackageAsync();// 用于判断用户是否选中了分享内容bool hasSelection = false;try{hasSelection = (dataPackage != null) && (dataPackage.GetView().AvailableFormats.Count > 0);}catch (Exception ex){switch (ex.HResult){// 无法为选中的内容生成 data packagecase unchecked((int)0x80070490):hasSelection = false;break;default:throw;}}if (hasSelection){dataPackage.Properties.Title = "Title（hasSelection）";}else{// 用户没有选择任何内容的话，则分享网页地址dataPackage = new DataPackage();dataPackage.SetWebLink(webView.Source);dataPackage.Properties.Title = "Title";}dataPackage.Properties.Description = "Description";request.Data = dataPackage;_dataTransferManager.DataRequested -= _dataTransferManager_DataRequested;deferral.Complete();}}
}