hello community,

I try to export Chart as PDF: when i write           

string documents =  System.Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
chart.RenderPdfFriendlyGraphics(g);

report.Publish(documents + "\\report.pdf", FileFormat.PDF); it works very well. But my problem i use asp.net mvc and want via Controller to export Chart:

var PieChart = new UltraChart();

........

var stream = new System.IO.MemoryStream();
new ExportToPDF().Export(PieChart, stream);
return new File(stream, "application/pdf", "report.pdf");

in my class ExportToPDF: report.Publish(stream, FileFormat.PDF) and with possibility i get empty File (report.pdf)

Thanks for reply and help