然而,当这样做在Windows 7 pc上时,图像质量变得非常差,最后的结果非常模糊.这是一个问题,因为计算机无法从Windows 7更新由于各种原因,所以我想知道是否有人经历过这一点,如果是有解决方法？也可能是我的GetFixedDocument方法的一个问题,虽然我无法解释为什么这将在10和8,而不是7.

注意这是从每个PC上的应用程序的安装版本运行

还可以在所有3个操作系统上打印多个打印机

任何帮助将不胜感激

XAML：

<StackPanel Margin="-105,146,66,0" Height="900" VerticalAlignment="Top"  x:Name="PrintImageContextMenu">
                <Image Canvas.ZIndex="0" Source="{Binding Coupon.OverlayImagePath}"  Margin="0,-21,-76,108" Stretch="Fill"  />

                <ContentControl Content="{Binding}"  ContentTemplateSelector="{StaticResource DataViewerDataTemplateSelector}"  />

            </StackPanel>

C#：
公共部分类CouponViewerView
{
public CouponViewerView()
{
的InitializeComponent();
}

public void Print()
    {
        //Executes On Thread
        Application.Current.Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority.Normal,(EventHandler)delegate
        {
            UpdateLayout();

            var fixedDoc = PrintHelper.GetFixedDocument(StackPanelToPrint,new PrintDialog());

            PrintHelper.ShowPrintPreview(fixedDoc);


        },null,null);



    }

    private void PrintCurrentForm(object sender,RoutedEventArgs e)
    {
        Print();
    }

C#打印帮助代码：

public static void ShowPrintPreview(FixedDocument fixedDoc)
        {
            var wnd = new Window();
            var viewer = new DocumentViewer();
            viewer.Document = fixedDoc;
            wnd.Content = viewer;
            wnd.ShowDialog();
        }


  public static FixedDocument GetFixedDocument(FrameworkElement toPrint,PrintDialog printDialog)
        {
            var capabilities = printDialog.PrintQueue.GetPrintCapabilities(printDialog.PrintTicket);
            var pageSize = new Size(printDialog.PrintableAreaWidth,printDialog.PrintableAreaHeight);
            var visibleSize = new Size(capabilities.PageImageableArea.ExtentWidth,capabilities.PageImageableArea.ExtentHeight);
            var fixedDoc = new FixedDocument();
            //If the toPrint visual is not displayed on screen we neeed to measure and arrange it  
            toPrint.Measure(new Size(double.PositiveInfinity,double.PositiveInfinity));
            toPrint.Arrange(new Rect(new Point(0,0),toPrint.DesiredSize));
            //  
            var size = toPrint.DesiredSize;
            //Will assume for simplicity the control fits horizontally on the page  
            double yOffset = 0;
            while (yOffset < size.Height)
            {
                var vb = new VisualBrush(toPrint)
                {
                    Stretch = Stretch.None,AlignmentX = AlignmentX.Left,AlignmentY = AlignmentY.Top,ViewBoxUnits = BrushMappingMode.Absolute,TileMode = TileMode.None,ViewBox = new Rect(0,yOffset,visibleSize.Width,visibleSize.Height)
                };
                var pageContent = new PageContent();
                var page = new FixedPage();
                ((IAddChild)pageContent).AddChild(page);
                fixedDoc.Pages.Add(pageContent);
                page.Width = pageSize.Width;
                page.Height = pageSize.Height;
                var canvas = new Canvas();
                FixedPage.SetLeft(canvas,capabilities.PageImageableArea.OriginWidth);
                FixedPage.SetTop(canvas,capabilities.PageImageableArea.OriginHeight);
                canvas.Width = visibleSize.Width;
                canvas.Height = visibleSize.Height;
                canvas.Background = vb;
                page.Children.Add(canvas);
                yOffset += visibleSize.Height;
            }
            return fixedDoc;
        }