Links to other PDF documents

[on-board data systems]

We have a pile of PDF documents that have external links to other pdf documents.

Is there anyway we can trap a callback so we can --
a) Stop the default behaviour being opening another PDF viewer as an external process (typically it ends up being Adobe Reader or IE)?
b) Verify it's opening a path that exists so we can handle the error, or redirect it to open another file?

[on-board data systems]

Got a little bit ahead...

if ("Prompts.ConfirmOpenSite".Equals(pName))
{
object fileNameToOpen;
pdfViewer.GetProperty("Prompts.ConfirmOpenSite.Name", out fileNameToOpen, 0);


pdfViewer.SetProperty("Prompts.ConfirmOpenSite.KeepUserChoice", 1, 0); // keep changes
pdfViewer.SetProperty("Prompts.ConfirmOpenSite.UserChoice", "No", 0); // cancel default

OpenPdfFile(new Uri((string)fileNameToOpen).ToString()); // crash there
}

Crashes when I open a new PDF file though, unless I put a sleep and thread it .... for example..

private void pdfViewer_OnEvent(object sender, AxPDFXCviewAxLib._IPDFXCviewEvents_OnEventEvent e)
{
switch (e.type)
{
case (int)PXCVA_EventTypes.PXCVA_OnDisplayPrompt:
{
OnPromptDisplayed(e.name);
break;
}
}
}

private void OnPromptDisplayed(string pName)
{
if ("Prompts.ConfirmOpenSite".Equals(pName))
{
object fileNameToOpen;
pdfViewer.GetProperty("Prompts.ConfirmOpenSite.Name", out fileNameToOpen, 0);

pdfViewer.SetProperty("Prompts.ConfirmOpenSite.KeepUserChoice", 1, 0);
pdfViewer.SetProperty("Prompts.ConfirmOpenSite.UserChoice", "No", 0);

Task.Run(() => {
System.Threading.Thread.Sleep(40);
OpenPdfFile(new Uri((string)fileNameToOpen).ToString());
});

}
}

Putting in "sleep" scares me --- is that safe?

[Walter-Tracker Supp]

You say it crashes unless you add the a sleep statement; what is the nature of the crash?

What is your OpenPdfFile() function?