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Search found 4 results on 1 pages for 'documentpaginator'.

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  • Creating WPF components in background thread

    - by mizipzor
    Im working on a reporting system, a series of DocumentPage are to be created through a DocumentPaginator. These documents include a number of WPF components that are to be instantiated so the paginator includes the correct things when later sent to the XpsDocumentWriter (which in turn is sent to the actual printer). My problem now is that the DocumentPage instances take quite a while to create (enough for Windows to mark the application as frozen) so I tried to create them in a background thread, which is problematic since WPF expects the attributes on them to be set from the GUI thread. I would also like to have a progress bar showing up, indicating how many pages have been created so far. Thus, it looks like Im trying to get two things to happen in parallell on the GUI. The problem is hard to explain and Im really not sure how to tackle it. In short: Create a series of DocumentPage's. These include WPF components These are to be created on a background thread, or use some other trick so the application isnt frozen. After each page is created, a WPF ProgressBar should be updated. If there is no decent way to do this, alternate solutions and approaches are more than welcome.

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  • Defining where on the page the flowdocument I am printing will 'start' and 'end'

    - by Sagi1981
    Dear community. I am almost done with implementing a printing functionality, but I am having trouble getting the last hurdle done with. My problem is, that I am printing some reports, consisting of a header (with information about the person the report is about), a footer (with a page number) and the content in the middle, which is a FlowDocument. Since the flowdocuments can be fairly long, It is very possible that they will span multiple pages. My approach is to make a custom FlowDocumentPaginator which derives from DocumentPaginator. In there i define my header and my footer. However, when I print my page, the flowdocument and my header and footer are on top of eachother. So my question is plain and simple - how do I define from where and to where the flowdocument part on the pages will be placed? here is the code from my custommade Paginator: public class HeaderedFlowDocumentPaginator : DocumentPaginator { private DocumentPaginator flowDocumentpaginator; public HeaderedFlowDocumentPaginator(FlowDocument document) { flowDocumentpaginator = ((IDocumentPaginatorSource) document).DocumentPaginator; } public override bool IsPageCountValid { get { return flowDocumentpaginator.IsPageCountValid; } } public override int PageCount { get { return flowDocumentpaginator.PageCount; } } public override Size PageSize { get { return flowDocumentpaginator.PageSize; } set { flowDocumentpaginator.PageSize = value; } } public override IDocumentPaginatorSource Source { get { return flowDocumentpaginator.Source; } } public override DocumentPage GetPage(int pageNumber) { DocumentPage page = flowDocumentpaginator.GetPage(pageNumber); ContainerVisual newVisual = new ContainerVisual(); newVisual.Children.Add(page.Visual); DrawingVisual header = new DrawingVisual(); using (DrawingContext dc = header.RenderOpen()) { //Header data } newVisual.Children.Add(header); DrawingVisual footer = new DrawingVisual(); using (DrawingContext dc = footer.RenderOpen()) { Typeface typeface = new Typeface("Trebuchet MS"); FormattedText text = new FormattedText("Page " + (pageNumber + 1).ToString(), CultureInfo.CurrentCulture, FlowDirection.LeftToRight, typeface, 14, Brushes.Black); dc.DrawText(text, new Point(page.Size.Width - 100, page.Size.Height-30)); } newVisual.Children.Add(footer); DocumentPage newPage = new DocumentPage(newVisual); return newPage; } } And here is the printdialogue call: private void btnPrint_Click(object sender, RoutedEventArgs e) { try { PrintDialog printDialog = new PrintDialog(); if (printDialog.ShowDialog() == true) { FlowDocument fd = new FlowDocument(); MemoryStream stream = new MemoryStream(ASCIIEncoding.Default.GetBytes(<My string of text - RTF formatted>)); TextRange tr = new TextRange(fd.ContentStart, fd.ContentEnd); tr.Load(stream, DataFormats.Rtf); stream.Close(); fd.ColumnWidth = printDialog.PrintableAreaWidth; HeaderedFlowDocumentPaginator paginator = new HeaderedFlowDocumentPaginator(fd); printDialog.PrintDocument(paginator, "myReport"); } } catch (Exception ex) { //Handle } }

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  • WPF: Best method for printing paginated datagrids

    - by FauxReal
    Boy did I get an education looking into this. I guess I've been spoiled by Powerbuilder, which has fantastic functionality for this out of the box. Does anyone seriously write custom documentpaginator objects to handle reporting needs for their LOB apps? I want to be able to print "for free" and not have to code like crazy just to take whats on the screen and throw it on paper. How are people doing this? Does anyone have a recommended 3rd party for allowing printing of largish datagrids? Thanks

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  • WPF FlowDocument: force calculation of height etc. "off screen"

    - by Lars
    My target: a DocumentPaginator which takes a FlowDocument with a table, which splits the table to fit the pagesize and repeat the header/footer (special tagged TableRowGroups) on every page. For splitting the table I have to know the heights of its rows. While building the FlowDocument-table by code, the height/width of the TableRows are 0 (of course). If I assign this document to a FlowDocumentScrollViewer (PageSize is set), the heights etc. are calculated. Is this possible without using an UI-bound object? Instantiating a FlowDocumentScrollViewer which is not bound to a window doesn't force the pagination/calculation of the heights. This is how I determine the height of a TableRow (which works perfectly for documents shown by a FlowDocumentScrollViewer): FlowDocument doc = BuildNewDocument(); // what is the scrollviewer doing with the FlowDocument? FlowDocumentScrollViewer dv = new FlowDocumentScrollViewer(); dv.Document = doc; dv.Arrange(new Rect(0, 0, 0, 0)); TableRowGroup dataRows = null; foreach (Block b in doc.Blocks) { if (b is Table) { Table t = b as Table; foreach (TableRowGroup g in t.RowGroups) { if ((g.Tag is String) && ((String)g.Tag == "dataRows")) { dataRows = g; break; } } } if (dataRows != null) break; } if (dataRows != null) { foreach (TableRow r in dataRows.Rows) { double maxCellHeight = 0.0; foreach (TableCell c in r.Cells) { Rect start = c.ElementStart.GetCharacterRect(LogicalDirection.Forward); Rect end = c.ElementEnd.GetNextInsertionPosition(LogicalDirection.Backward).GetCharacterRect(LogicalDirection.Forward); double cellHeight = end.Bottom - start.Top; if (cellHeight > maxCellHeight) maxCellHeight = cellHeight; } System.Diagnostics.Trace.WriteLine("row " + dataRows.Rows.IndexOf(r) + " = " + maxCellHeight); } } Edit: I added the FlowDocumentScrollViewer to my example. The call of "Arrange" forces the FlowDocument to calculate its heights etc. I would like to know, what the FlowDocumentScrollViewer is doing with the FlowDocument, so I can do it without the UIElement. Is it possible?

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