这里AddPage()方法在创建pdf时消耗更多内存(In Bytes [])。创建pdf后它没有被释放。我尝试使用freereader()方法但没有用。请建议我如何释放内存或消耗更少内存的方法
Public Sub AddStampedPagesToDocument(ByVal stamperStream As MemoryStream)
Dim documentReader As PdfReader
If stamperStream IsNot Nothing Then
mStamper.FormFlattening = True
mStamper.Close()
documentReader = New PdfReader(stamperStream.ToArray)
If (mOutputWriter Is Nothing) Then
mOutputDocument = New Document(documentReader.GetPageSizeWithRotation(1))
mOutputWriter = New PdfCopy(mOutputDocument, mOutputStream)
mOutputDocument.Open()
End If
For pageCount As Integer = 1 To mFormReader.NumberOfPages
mOutputWriter.AddPage(mOutputWriter.GetImportedPage(documentReader, pageCount))
mOutputDocumentPageCount += 1
Next
mStamperStream = stamperStream
mOutputWriter.FreeReader(documentReader)
End If
End Sub