Direct to file mode fails on pdf.close()

Aspose.PDF Product Family
1

I am opening a filestream to a pdf file using FileMode.Create and FileAccess.ReadWrite
Everything goes smooth until I call the Close() method.
It works fine when using memmory but when I try to use a a FileStream it crashes:

My code is something like this:

dim fin as new FileInfo(“test.pdf”)
dim f as IO.FileStream= fin.Open(FileMode.Create, FileAccess.ReadWrite)
dim _pdf as new Pdf(f)
…
Here I write some sections that worked when using memmory
…
_pdf.close()

Then I get a nullref error like this:

Message: “Object reference not set to an instance of an object.”
Source: “Aspose.Pdf”
StackTrace: " at Aspose.Pdf.Xml.aw.a(Pdf A_0, c A_1)
at Aspose.Pdf.Pdf.Close()

Also there are never more that 15 bytes of data written to the stream, which in fact should be larger.

Hope you can help me on this.

With regards
Morten

2

Dear Morten,

Thank you for considering Aspose.

I have tested using the following code and have not found any error:

Dim fin As New FileInfo("e:/temp/test.pdf")
Dim f As IO.FileStream = fin.Open(FileMode.Create, FileAccess.ReadWrite)
Dim _pdf As New Pdf(f)

Dim sec As Section = _pdf.Sections.Add()

Dim t As Aspose.Pdf.Text = New Aspose.Pdf.Text("hello world")
sec.AddParagraph(t)


_pdf.Close()

3

When using images of the type MemmoryBMP it seems the behaviour of direct to file mode differs somewhat from memmory mode.

In Direct to file mode I have to read in all of the memmory data of the image before calling the AddParagraph.
In Memmory mode I call AddParagraph first and secondly read in the Memmorydata.

Anyway, the problem I had was solved by calling AddParagraph at the end of the code.

With regards
Morten