private async void Button_Click(object sender, RoutedEventArgs e)
{
string width = await WebViewPage.InvokeScriptAsync("eval", new[] { "document.body.scrollWidth.toString()" });
string height = await WebViewPage.InvokeScriptAsync("eval", new[] { "document.body.scrollHeight.toString()" });
RenderTargetBitmap rtb = new RenderTargetBitmap();
await rtb.RenderAsync(WebViewPage);
var pixelBuffer = await rtb.GetPixelsAsync();
var pixels = pixelBuffer.ToArray();
var displayInformation = DisplayInformation.GetForCurrentView();
var file = await ApplicationData.Current.LocalFolder.CreateFileAsync("goodImage" + ".png", CreationCollisionOption.ReplaceExisting);
using (var stream = await file.OpenAsync(FileAccessMode.ReadWrite))
{
var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, stream);
encoder.SetPixelData(BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Premultiplied,
(uint)rtb.PixelWidth,
(uint)rtb.PixelHeight,
displayInformation.RawDpiX,
displayInformation.RawDpiY,
pixels);
await encoder.FlushAsync();
}
}
