# WPF printing a flow document

**URL:** https://talk.remobjects.com/t/wpf-printing-a-flow-document/6850
**Category:** Snippets
**Tags:** echoes, printer, elements, csharp
**Created:** [September 14, 2015, 9:32am UTC](https://talk.remobjects.com/t/wpf-printing-a-flow-document/6850 "2015-09-14T09:32:10Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![ck](https://talk.remobjects.com/user_avatar/talk.remobjects.com/ck/32/8740_2.png) [@ck](https://talk.remobjects.com/u/ck)
#### Post date: [September 14, 2015, 9:32am UTC](https://talk.remobjects.com/t/wpf-printing-a-flow-document/6850/1 "2015-09-14T09:32:11Z")

</div>

The following shows how to adjust a flow document to match the printer settings, how to turn it into an in memory xps document and how to show a print preview dialog.

```auto
	// Modified version of http://stackoverflow.com/questions/2322064/how-can-i-produce-a-print-preview-of-a-flowdocument-in-a-wpf-application
	
	private static string _previewWindowXaml =
    @"<Window
        xmlns ='http://schemas.microsoft.com/netfx/2007/xaml/presentation'
        xmlns:x ='http://schemas.microsoft.com/winfx/2006/xaml'
        Title ='Print Preview - @@TITLE'
        Height ='600'
        Width ='800'
        WindowStartupLocation ='CenterOwner'>
        <DocumentViewer Name='dv1'/>
     </Window>";
        // the xps writer wants to close the memory stream, we don't want that to happen.
        class MyMemoryStream: MemoryStream
        {
            protected override void Dispose(bool disposing)
            {
                //base.Dispose(disposing);
            }
        }
	internal static void DoPreview(FlowDocument fd, Window owner, string title)
	{
		PrintDialog pd = new PrintDialog();
		// Create a copy because we're going to resize it to match the printer settings
		String copyString = XamlWriter.Save(fd);
		FlowDocument copy = XamlReader.Parse(copyString) as FlowDocument;
		
		copy.DataContext = fd.DataContext;
		IDocumentPaginatorSource fdd = copy;
		copy.PageWidth = pd.PrintableAreaWidth;
		copy.PageHeight = pd.PrintableAreaHeight;
		copy.ColumnWidth = pd.PrintableAreaWidth;
		copy.PagePadding = new Thickness(30.0, 50.0, 20.0, 30.0);
		copy.IsOptimalParagraphEnabled = true;
		copy.IsHyphenationEnabled = true;	
		
		IDocumentPaginatorSource fdd = copy;
		DoPreview(copy, owner, title);
	}
		
        internal static void DoPreview(DocumentPaginator fd, Window owner, string title)
        {
            //FlowDocumentScrollViewer visual = (FlowDocumentScrollViewer)(_parent.FindName("fdsv1"));
                var ms = new MyMemoryStream();
            using (var pkg = System.IO.Packaging.Package.Open(ms, FileMode.Create))
            {
                using (XpsDocument doc = new XpsDocument(pkg))
                {
                    XpsDocumentWriter writer = XpsDocument.CreateXpsDocumentWriter(doc);
                    writer.Write(fd);
                }
            }
            //ms.ToArray()
            ms.Position = 0;
            var pkg2 = System.IO.Packaging.Package.Open(ms);
            // Read the XPS document into a dynamically generated
            // preview Window 
            var url = new Uri("memorystream://printstream");
            PackageStore.AddPackage(url, pkg2);
			try 
			{
				using (XpsDocument doc = new XpsDocument(pkg2, CompressionOption.SuperFast, url.AbsoluteUri))
				{
					FixedDocumentSequence fds = doc.GetFixedDocumentSequence();
					string s = _previewWindowXaml;
					s = s.Replace("@@TITLE", title.Replace("'", "&apos;"));
					using (var reader = new System.Xml.XmlTextReader(new StringReader(s)))
					{
						Window preview = System.Windows.Markup.XamlReader.Load(reader) as Window;
						DocumentViewer dv1 = LogicalTreeHelper.FindLogicalNode(preview, "dv1") as DocumentViewer;
						dv1.Document = fds as IDocumentPaginatorSource;
					preview.Owner = owner;
						preview.ShowDialog();
					}
				}
			} finally {
				PackageStore.RemovePackage(url);
			}
        }

```