Hi,

Try exporting with the SuppressUnmanagedCode property enabled, that should avoid the GetHdc() call. We use native code to get some font metrics necessary for PDF font tables generation, and if you suppress it, you must also set the FontCachePath property. See the remarks in this help topic for more information:
http://www.mindfusion.eu/onlinehelp/netdiagram/index.htm?P_MindFusion_Diagrammin...

I hope that helps,
Stoyan

Hi,

I tried with the following code in order to avoid the issue on Windows Azure:

Dim pdf As New MindFusion.Diagramming.Export.PdfExporter()
        pdf.SuppressUnmanagedCode = True
        pdf.FontCachePath = Server.MapPath("~/pdflib-fontrecords.xml")

        Dim path As String = Server.MapPath("~/file.pdf")
        pdf.Export(DiagramView1.Diagram, path)

Unfortunately I get the error "Cannot find PDF font metrics cache file. Make sure pdflib-fontrecords.xml is in the application's folder, ot assign its location to the FontCachePath property.".
The "pdflib-fontrecords.xml" file is added to the project. I can download it from the same location without a problem. Please advice how to proceed or show me a sample code.

Regards,
Martin

Actually that first example mentions MapPath can map to the app_data folder, so you might also try deploying the cache file there. However app_data only allows read-only access, so it seems you will need a local storage for the generated PDF files anyway.

I hope that helps,
Stoyan

This is thrown in response to a simple !File.Exists(FontCachePath) check, so either the file has not been deployed at all or the property value does not point to the deployed file. Try writing the path value to the page html to verify if it corresponds to the correct location of deployed cache file. I can't see any problems using it locally, we'll try it on Azure next week.

It seems something else is going on.  I have put some test code in to check for the existence of the file.   Is there something else expected in the FontCachePath parameter?

Here is my code.

        ' generate the PDF file
        exporter.SuppressUnmanagedCode = True           ' required to run under Azure!
        exporter.FontCachePath = Server.MapPath("~/pdflib-fontrecords.xml") ' point to font data

        'Test for valid path
        If (Not File.Exists(exporter.FontCachePath)) Then
            Throw New System.Exception("Diagram Export PDF failed to locate font cache file!")
        End If

        exporter.Export(diagram, tempPath)  '<--- throws file not found exception.


Please see attached screen shot running on my local IIS (not Azure).

Unfortunately this workaround does not fix the problem.  The Export method still throws an exception.

It worked for us with SuppressNativeCode enabled too:
http://mindfusion2.cloudapp.net/

The only changes in the Tutorial project were adding pdflib-fontrecords.xml to it as content, and using this export code:

protected void btnExportPdf_Click(object sender, EventArgs e)
{
	MindFusion.Diagramming.Export.PdfExporter pdf =
		new MindFusion.Diagramming.Export.PdfExporter();

	PdfGraphics.SuppressUnmanagedCode = false;
	PdfGraphics.FontCachePath = Server.MapPath(@"~\pdflib-fontrecords.xml");
	pdf.SuppressUnmanagedCode = true;
	string fileName = Session.SessionID + "_" + rnd.Next() + ".pdf"; ;
	string path = Server.MapPath(@"~\PDF\") + fileName;
	pdf.Export(diagView.Diagram, path);

	pdfURL.Value = "PDF/" + fileName;
}

Random rnd = new Random();
 

There wasn't a problem with older PDF files being served; what we saw was coming from the browser's local cache. Adding a random value to the file name fixed that.

I hope that helps,
Stoyan