打印WPF FlowDocument

Question

我正在WPF中构建一个演示应用程序，这对我来说是新的。我目前在FlowDocument中显示文本，并需要打印它。

的代码我使用看起来像这样：

 PrintDialog pd = new PrintDialog(); 
     fd.PageHeight = pd.PrintableAreaHeight; 
     fd.PageWidth = pd.PrintableAreaWidth; 
     fd.PagePadding = new Thickness(50); 
     fd.ColumnGap = 0; 
     fd.ColumnWidth = pd.PrintableAreaWidth; 

     IDocumentPaginatorSource dps = fd; 
     pd.PrintDocument(dps.DocumentPaginator, "flow doc"); 

fd是我的FlowDocument，现在来看我使用默认打印机，而不是允许用户指定打印选项。它工作正常，除了在文档打印之后，屏幕上显示的FlowDocument已更改为使用我指定用于打印的设置。

我可以通过在打印后手动重置所有内容来解决此问题，但这是最佳方式吗？我应该在打印之前制作FlowDocument的副本吗？或者我应该考虑另一种方法？

Answer 1

是，在打印之前进行的FlowDocument的副本。这是因为分页和边距会有所不同。这对我有用。

private void DoThePrint(System.Windows.Documents.FlowDocument document) 
    { 
     // Clone the source document's content into a new FlowDocument. 
     // This is because the pagination for the printer needs to be 
     // done differently than the pagination for the displayed page. 
     // We print the copy, rather that the original FlowDocument. 
     System.IO.MemoryStream s = new System.IO.MemoryStream(); 
     TextRange source = new TextRange(document.ContentStart, document.ContentEnd); 
     source.Save(s, DataFormats.Xaml); 
     FlowDocument copy = new FlowDocument(); 
     TextRange dest = new TextRange(copy.ContentStart, copy.ContentEnd); 
     dest.Load(s, DataFormats.Xaml); 

     // Create a XpsDocumentWriter object, implicitly opening a Windows common print dialog, 
     // and allowing the user to select a printer. 

     // get information about the dimensions of the seleted printer+media. 
     System.Printing.PrintDocumentImageableArea ia = null; 
     System.Windows.Xps.XpsDocumentWriter docWriter = System.Printing.PrintQueue.CreateXpsDocumentWriter(ref ia); 

     if (docWriter != null && ia != null) 
     { 
      DocumentPaginator paginator = ((IDocumentPaginatorSource)copy).DocumentPaginator; 

      // Change the PageSize and PagePadding for the document to match the CanvasSize for the printer device. 
      paginator.PageSize = new Size(ia.MediaSizeWidth, ia.MediaSizeHeight); 
      Thickness t = new Thickness(72); // copy.PagePadding; 
      copy.PagePadding = new Thickness(
          Math.Max(ia.OriginWidth, t.Left), 
           Math.Max(ia.OriginHeight, t.Top), 
           Math.Max(ia.MediaSizeWidth - (ia.OriginWidth + ia.ExtentWidth), t.Right), 
           Math.Max(ia.MediaSizeHeight - (ia.OriginHeight + ia.ExtentHeight), t.Bottom)); 

      copy.ColumnWidth = double.PositiveInfinity; 
      //copy.PageWidth = 528; // allow the page to be the natural with of the output device 

      // Send content to the printer. 
      docWriter.Write(paginator); 
     } 

    } 

Answer 2

您可以使用下面的URL代码，它将流程文档包装在一个固定的文档中并打印出来，最大的好处是您可以使用它来添加页边距，页眉和页脚。

http://blogs.msdn.com/fyuan/archive/2007/03/10/convert-xaml-flow-document-to-xps-with-style-multiple-page-page-size-header-margin.aspx

Answer 3

我也产生一个WPF报告过流文件，但我故意使用流文档的打印预览画面。我在那里希望边际保持一致。你可以阅读关于how I did this here。

在你的场景中，我想为什么不直接复制你的设置，而不是整个流程文档。如果您希望将文档恢复到原始状态，您可以重新应用这些设置。

Answer 4

与文本和非文本的视觉效果以下工作：

//Clone the source document 
var str = XamlWriter.Save(FlowDoc); 
var stringReader = new System.IO.StringReader(str); 
var xmlReader = XmlReader.Create(stringReader); 
var CloneDoc = XamlReader.Load(xmlReader) as FlowDocument; 

//Now print using PrintDialog 
var pd = new PrintDialog(); 

if (pd.ShowDialog().Value) 
{ 
    CloneDoc.PageHeight = pd.PrintableAreaHeight; 
    CloneDoc.PageWidth = pd.PrintableAreaWidth; 
    IDocumentPaginatorSource idocument = CloneDoc as IDocumentPaginatorSource; 

    pd.PrintDocument(idocument.DocumentPaginator, "Printing FlowDocument"); 
}