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adam
Joined: 05 Apr 2008
Posts: 1
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 Posted: Sun Apr 06, 2008 11:23 am Post subject: PagePreview problem |
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Hi,
I've got problem with pdf preview.
This is my C# code:
public partial class PrintForm : Form, IPrintForm
{
private PagePreview.RenderEvent renderEvent;
private System.IO.MemoryStream memStream;
public PrintForm()
{
InitializeComponent();
}
public void ShowPrintForm(System.IO.MemoryStream mem)
{
this.memStream = mem;
this.renderEvent = new PagePreview.RenderEvent(Render);
pagePreview.SetRenderEvent(this.renderEvent);
this.ShowDialog();
}
private void Render(XGraphics gfx)
{
PdfDocument document = PdfReader.Open(this.memStream);
gfx = XGraphics.FromPdfPage(document.Pages[0]);
}
...
}
I'm using VS 2008 Express Edition with PDFSharp v.1.0.898.0
PDFSharp was compiled under VS2008 and Runtime version 2.0.50727.
I'm using PdfSharp.Forms.PagePreview for viewing PDF's.
Problem: I'm receiving blank preview.
When I put this code in Render method:
PdfDocument document = new PdfDocument();
PdfPage page = document.AddPage();
XGraphics gfx = XGraphics.FromPdfPage(page);
XFont font = new XFont("Verdana", 20, XFontStyle.Bold);
gfx.DrawString("Hello, World!", font, XBrushes.Black,
new XRect(0, 0, page.Width, page.Height),
XStringFormat.Center);
.... everything works good.
When I try save document (in Render metod) ... everything works good.
Does anyone know what is wrong ?
Thanks
Adam S. |
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dvh
Joined: 14 Oct 2008
Posts: 4
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| Posted: Tue Oct 14, 2008 8:14 pm Post subject: |
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Hi,
Is there a solution for this problem already? I encountered a similar (if not the same) one - the following code does produce an empty preview.
| Code: | [...]
PdfDocument outputDocument = new PdfDocument();
PdfDocument inputDocument = PdfReader.Open(<<some_file_or_filestream>>, PdfDocumentOpenMode.Import);
for (int i = 0; i < inputDocument.PageCount; i++) {
PdfPage page = inputDocument.Pages[i];
outputDocument.AddPage(page);
}
for (int i = 0; i < outputDocument.PageCount; i++) {
PdfPage page = outputDocument.Pages[i];
gfx = XGraphics.FromPdfPage(page, XGraphicsPdfPageOptions.Append);
}
[...]
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The code above is an excerpt from the Preview sample Render(XGraphics) method which I modified.
Any help would be much appreciated. TIA |
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Thomas Hoevel
Joined: 16 Oct 2006
Posts: 387
Location: Cologne, Germany
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| Posted: Wed Oct 15, 2008 8:23 am Post subject: |
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Hello!
It's by design that only XGraphics show in Preview, not imported PDF pages.
Imported pages will show when a PDF file is created (directly or indirectly from the Preview dialogue).
Workaround: Create PDFs directly and show them with Adobe Reader.
_________________
Regards
Thomas Hoevel
PDFsharp Team |
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