我的 xaml 中有一个 webview，由于 webview 的大小，它不能一次显示所有的 html 内容，所以有一个滚动查看器。我想打印html文件的所有内容，但是当我在设备魅力中选择打印机时，预览页面只显示当前在webview中显示的内容，不可见的内容无法显示在预览页面中，任何人可以帮忙？下面是我的代码。
public sealed partial class MainPage : Page
{
PrintDocument printDocument;
IPrintDocumentSource printDocumentSource;
WebView wv;
public MainPage()
{
this.InitializeComponent();
printDocument = new PrintDocument();
printDocumentSource = printDocument.DocumentSource;
printDocument.Paginate += OnPrintDocumentPaginate;
printDocument.GetPreviewPage += OnPrintDocumentGetPreviewPage;
printDocument.AddPages += OnPrintDocumentAddPages;
wv = FindName("webviewPrint") as WebView;
}
private void OnPrintDocumentAddPages(object sender, AddPagesEventArgs e)
{
printDocument.AddPage(wv);
printDocument.AddPagesComplete();
}
private void OnPrintDocumentGetPreviewPage(object sender, GetPreviewPageEventArgs e)
{
printDocument.SetPreviewPage(e.PageNumber, wv);
}
private void OnPrintDocumentPaginate(object sender, PaginateEventArgs e)
{
printDocument.SetPreviewPageCount(1, PreviewPageCountType.Final);
}
private void OnPrintManagerPrintTaskRequested(PrintManager sender, PrintTaskRequestedEventArgs args)
{
args.Request.CreatePrintTask("Hello Printer", OnPrintTaskSourceRequested);
}
void OnPrintTaskSourceRequested(PrintTaskSourceRequestedArgs args)
{
args.SetSource(printDocumentSource);
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
PrintManager.GetForCurrentView().PrintTaskRequested += OnPrintManagerPrintTaskRequested;
base.OnNavigatedTo(e);
}
protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
PrintManager.GetForCurrentView().PrintTaskRequested -= OnPrintManagerPrintTaskRequested;
base.OnNavigatingFrom(e);
}
}