i have a webapp that teachers use to fill out forms for special education.
i just started using iTextSharp (latest v.) to take a data entry PDF and
it's data via FDF, and render it into a completely new PDF containing just
the original PDFs image. i do this to ensure i get the smallest file size
possible when printing.
i have an intermittent error that appears when the new printed PDF is served
up to the browser. i get:
"There was an error processing a page. Could not find XObject named '%s'."
this ultimately locks up my browser.
strangely enough, all signs point to this being a usage/load issue as it
only happens to the PDFs that alot of users are interfacing with
simultaneously.
i'm not sure if its my code (see below) or the forms themselves (see
attached). i find it interesting that i can not produce the error late at
night when the server usage is down. also on a separate test server, using
the same code, same PDFs, and zero usage everything works great!
i appreciate any advice/insight anyone can provide.
Jason
Code:
Private Sub OutputForm()
Dim iTextReader As PdfReader
Dim iTextStamper As PdfStamper
Dim iTextWriter As PdfWriter
Dim iTextDoc As Document
Dim iTextImage As Image
Dim iTextPage As PdfImportedPage
Dim iTextFDF As FdfReader
Dim memStm As New MemoryStream
Dim iPage As Integer
Dim sValue As String
Dim htFields As New Hashtable
Dim enField As IDictionaryEnumerator
Try
Dim sPDF As String = "C:\Form1.pdf"
'Read PDF & FDF into memory
iTextReader = New PdfReader(sPDF)
iTextFDF = New FdfReader(sPDF.Replace(".pdf", ".fdf"))
iTextStamper = New PdfStamper(iTextReader, memStm)
iTextReader.Close()
'Field Code
htFields = iTextFDF.Fields
enField = htFields.GetEnumerator
While enField.MoveNext
sValue = iTextFDF.GetFieldValue(enField.Key.ToString)
If sValue.Length > 0 Then
iTextStamper.AcroFields.SetField(enField.Key.ToString,
sValue)
End If
End While
iTextStamper.FormFlattening = True
iTextStamper.Close()
'Create/Open Writer
http://old.nabble.com/file/p26344825/Form1.pdf Form1.pdf
http://old.nabble.com/file/p26344825/Form1.fdf Form1.fdf
iTextReader = New PdfReader(memStm.ToArray)
iTextDoc = New Document(IIf(iTextReader.GetPageSize(1).Height <
iTextReader.GetPageSize(1).Width, iTextReader.GetPageSize(1).Rotate,
iTextReader.GetPageSize(1)), 0, 0, 0, 0)
iTextWriter = PdfWriter.GetInstance(iTextDoc, New
FileStream("c:\Output.pdf", FileMode.Create))
iTextWriter.SetFullCompression()
iTextDoc.Open()
'Copy each page from Reader to Writer as image
For iPage = 1 To iTextReader.NumberOfPages
iTextPage = iTextWriter.GetImportedPage(iTextReader, iPage)
iTextImage = Image.GetInstance(iTextPage)
If iTextReader.GetPageSize(iPage).Height <
iTextReader.GetPageSize(iPage).Width Then
iTextImage.RotationDegrees = 90
End If
iTextDoc.Add(iTextImage)
Next
iTextDoc.Close()
Catch ex As Exception
System.Diagnostics.EventLog.WriteEntry("iText", ex.Source & " "
& ex.Message & " " & ex.StackTrace)
Finally
iTextReader = Nothing
iTextStamper = Nothing
iTextWriter = Nothing
iTextDoc = Nothing
iTextImage = Nothing
iTextPage = Nothing
iTextFDF = Nothing
memStm.Flush()
memStm = Nothing
htFields = Nothing
End Try
End Sub
--
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Sent from the iText - General mailing list archive at Nabble.com.
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