For a windows service project i have to make reports in xps format. I have xaml code that i turn into an xps document:
private void th_PrintErrorReport(OrderReportData reportData)
{
...
//Use the XAML reader to create a FlowDocument from the XAML string.
FlowDocument document = XamlReader.Load(new XmlTextReader(new StringReader(vRawXaml))) as FlowDocument;
//create xps file
using (XpsDocument xpsDoc = new XpsDocument(vFilePath, System.IO.FileAccess.Write, CompressionOption.Maximum))
{
// create a serialization manager
using (XpsSerializationManager rsm = new XpsSerializationManager(new XpsPackagingPolicy(xpsDoc), false))
{
// retrieve document paginator
DocumentPaginator paginator = ((IDocumentPaginatorSource)document).DocumentPaginator;
// save as XPS
rsm.SaveAsXaml(paginator);
rsm.Commit();
}
}
}
This works but unfortunately creates a memory leak, each report created leaves the wpf controls (contentpresent, labels, etc) in memory. I checked this with a memory profiler. I checked topics like this one and this one which made me think that the wpf dispatcher/message pump is the problem. To make the message pump run i changed my code to:
public void StartHandling()
{
_ReportPrintingActive = true;
//xaml parsing has to run on a STA thread
_ReportPrintThread = new Thread(th_ErrorReportHandling);
_ReportPrintThread.SetApartmentState(ApartmentState.STA);
_ReportPrintThread.Name = "ErrorReportPrinter";
_ReportPrintThread.Start();
}
private void th_ErrorReportHandling()
{
Dispatcher.Run();
}
public void PrintErrorReport(OrderReportData reportData)
{
Action action = () =>
{
th_PrintErrorReport(reportData);
};
Dispatcher.FromThread(_ReportPrintThread).BeginInvoke(action);
}
But still no success. What am i missing ?
