我目前正在尝试使用PrintFixedDocument打印一个内容容器的内容（它只包含带有信息的数据网格）和一张图片。在我的机器上（Windows 10）以及另一台运行Windows 8的PC上，它的打印质量非常好。
但是，在Windows 7 PC上执行此操作时，图像质量变得非常差，最终结果非常模糊。这是一个问题，因为由于各种原因，该计算机不能从Windows 7进行更新，所以我想知道是否有其他人经历过这种情况，如果有，是否有解决方法？还可能与我的GetFixedDocument方法有关，但我无法弄清楚为什么这可以在win 10和8上运行，但不适用于win 7。
注意：此操作是在每台PC上安装的应用程序上运行的
同时在所有3个操作系统上尝试了多个打印机
将不胜感激任何帮助
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＃： public partial class CouponViewerView { // CouponViewerView的构造函数 public CouponViewerView() { 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#打印帮助器代码：
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;
}