I am trying to read an XPS file that I have inserted into my database using the Filestream attribute. Here is my code thus far.
RewardsDataContext dx = new RewardsDataContext();
var img = (from c in dx.RwProductsTests
select c).FirstOrDefault();
byte[] buffer = img.Blob.ToArray();
MemoryStream ms = new MemoryStream();
ms.Write(buffer, 0, buffer.Length);
ms.Position = 0;
Package package = Package.Open(ms, FileMode.OpenOrCreate, FileAccess.ReadWrite);
XpsDocument MyDoc = new XpsDocument(package);
dv1.Document = MyDoc.GetFixedDocumentSequence();
dx.Dispose();
and I get the following error.
XpsDocument URI is null. Use XpsDocument constructor that takes URI parameter.
Related
We are using PKCS7 Signatures and are signing a document on the server using a signature created on the client. We are creating Pdf Objects in memory, and want to switch to a system where we do not need to depend on system memory. Currently, I am saving the PdfSignatureAppearance Object created while generating hash in session,and then using this object from session when I receive a response from client (Signed Hash Content). Could you please help me figure out a way through which I do not need to save the PdfSignatureAppearance object in session and can directly use the Temp File for signing?
First, we generate a hash of file after inserting signature appearance as shown in the code below:
File file = new File("To be signed file location")
char version = '\u0000'
ByteArrayOutputStream out = new ByteArrayOutputStream()
String outputFile = "Signed file name"
FileOutputStream fileOutputStream = new FileOutputStream(outputFile)
PdfReader pdfReader = new PdfReader(new FileInputStream(file.absolutePath))
PdfStamper stamper = new PdfStamper(pdfReader, out, version, true)
PdfFormField pdfFormField = PdfFormField.createSignature(stamper.getWriter())
String signatureName = "Signature1"
pdfFormField.setWidget(new Rectangle((float) 20, (float) 20, (float) 100, (float) 60), (PdfName) null)
pdfFormField.setFlags(4)
pdfFormField.put(PdfName.DA, new PdfString("/Helv 0 Tf 0 g"))
pdfFormField.setFieldName(signatureName)
pdfFormField.setPage(1)
stamper.addAnnotation(pdfFormField, i)
stamper.close()
pdfReader = new PdfReader(out.toByteArray())
stamper = PdfStamper.createSignature(pdfReader, fileOutputStream, version, (File) null, true)
PdfSignatureAppearance appearance = stamper.getSignatureAppearance()
appearance.setLayer2Text("Digitally Signed by Name")
appearance.setImage(Image.getInstance(esignRequestCO.logoLocation))
appearance.setAcro6Layers(true)
Calendar cal = Calendar.getInstance()
cal.setTime(new Date())
cal.add(12, 5)
appearance.setSignDate(cal)
appearance.setVisibleSignature(signatureName)
int contentEstimated = 16384
HashMap<PdfName, Integer> exc = new HashMap()
exc.put(PdfName.CONTENTS, contentEstimated * 2 + 2)
PdfSignature dic = new PdfSignature(PdfName.ADOBE_PPKLITE, PdfName.ADBE_PKCS7_DETACHED)
dic.setReason(appearance.getReason())
dic.setLocation(appearance.getLocation())
dic.setDate(new PdfDate(appearance.getSignDate()))
appearance.setCryptoDictionary(dic)
appearance.preClose(exc)
InputStream inp = appearance.getRangeStream()
byte[] bytes = IOUtils.toByteArray(inp)
String hash = DigestUtils.sha256Hex(bytes)
As soon as we get the signed content, we insert the content in the file using same appearance object as shown below:
int contentEstimated = 16384
PdfSignatureAppearance appearance = "PdfSignatureAppearance object from session generated in previous step"
byte[] p7barray = "signed content here".bytes
byte[] paddedSig = new byte[contentEstimated]
System.arraycopy(p7barray, 0, paddedSig, 0, p7barray.length)
PdfDictionary dic2 = new PdfDictionary()
dic2.put(PdfName.CONTENTS, (new PdfString(paddedSig)).setHexWriting(true))
appearance.close(dic2)
I have several datasheets for products. Each is a separate file. What I want to do is to use iText to generate a summary / recommended set of actions, based on answers to a webform, and then append to that all the relevant datasheets. This way, I only need to open one new tab in the browser to print all information, rather than opening one for the summary, and one for each datasheet that is needed.
So, is it possible to do this using iText?
Yes, you can merge PDFs using iText 7. E.g. look at the iText 7 Jump-Start tutorial sample C06E04_88th_Oscar_Combine, the pivotal code is:
PdfDocument pdf = new PdfDocument(new PdfWriter(dest));
PdfMerger merger = new PdfMerger(pdf);
//Add pages from the first document
PdfDocument firstSourcePdf = new PdfDocument(new PdfReader(SRC1));
merger.merge(firstSourcePdf, 1, firstSourcePdf.getNumberOfPages());
//Add pages from the second pdf document
PdfDocument secondSourcePdf = new PdfDocument(new PdfReader(SRC2));
merger.merge(secondSourcePdf, 1, secondSourcePdf.getNumberOfPages());
firstSourcePdf.close();
secondSourcePdf.close();
pdf.close();
(C06E04_88th_Oscar_Combine method createPdf)
Depending on your use case, you might want to use the PdfDenseMerger with its helper class PageVerticalAnalyzer instead of the PdfMerger here. It attempts to put content from multiple source pages onto a single target page and corresponds to the iText 5 PdfVeryDenseMergeTool from this answer. Due to the nature of PDF files this only works for PDFs without headers, footers, and similar artifacts.
I found a solution that works quite well.
public byte[] Combine(IEnumerable<byte[]> pdfs)
{
using (var writerMemoryStream = new MemoryStream())
{
using (var writer = new PdfWriter(writerMemoryStream))
{
using (var mergedDocument = new PdfDocument(writer))
{
var merger = new PdfMerger(mergedDocument);
foreach (var pdfBytes in pdfs)
{
using (var copyFromMemoryStream = new MemoryStream(pdfBytes))
{
using (var reader = new PdfReader(copyFromMemoryStream))
{
using (var copyFromDocument = new PdfDocument(reader))
{
merger.Merge(copyFromDocument, 1, copyFromDocument.GetNumberOfPages());
}
}
}
}
}
}
return writerMemoryStream.ToArray();
}
}
Use
DirectoryInfo d = new DirectoryInfo(INPUT_FOLDER);
var pdfList = new List<byte[]> { };
foreach (var file in d.GetFiles("*.pdf"))
{
pdfList.Add(File.ReadAllBytes(file.FullName));
}
File.WriteAllBytes(OUTPUT_FOLDER + "\\merged.pdf", Combine(pdfList));
Autor:
https://www.nikouusitalo.com/blog/combining-pdf-documents-using-itext7-and-c/
If you want to add two array of bytes and return one array of bytes as PDF/A
public static byte[] mergePDF(byte [] first, byte [] second) throws IOException {
// Initialize PDF writer
ByteArrayOutputStream arrayOutputStream = new ByteArrayOutputStream();
PdfWriter writer = new PdfWriter(arrayOutputStream);
// Initialize PDF document
PdfADocument pdf = new PdfADocument(writer, PdfAConformanceLevel.PDF_A_1B, new PdfOutputIntent("Custom", "",
"https://www.color.org", "sRGB IEC61966-2.1", new FileInputStream("sRGB_CS_profile.icm")));
PdfMerger merger = new PdfMerger(pdf);
//Add pages from the first document
PdfDocument firstSourcePdf = new PdfDocument(new PdfReader(new ByteArrayInputStream(first)));
merger.merge(firstSourcePdf, 1, firstSourcePdf.getNumberOfPages());
//Add pages from the second pdf document
PdfDocument secondSourcePdf = new PdfDocument(new PdfReader(new ByteArrayInputStream(second)));
merger.merge(secondSourcePdf, 1, secondSourcePdf.getNumberOfPages());
firstSourcePdf.close();
secondSourcePdf.close();
writer.close();
pdf.close();
return arrayOutputStream.toByteArray();
}
The question doesn't specify the language, so I'm adding an answer using C#; this works for me. I'm creating three separate but related PDFs then combining them into one.
After creating the three separate PDF docs and adding data to them, I combine them this way:
PdfDocument pdfCombined = new PdfDocument(new PdfWriter(destCombined));
PdfMerger merger = new PdfMerger(pdfCombined);
PdfDocument pdfReaderExecSumm = new PdfDocument(new PdfReader(destExecSumm));
merger.Merge(pdfReaderExecSumm, 1, pdfReaderExecSumm.GetNumberOfPages());
PdfDocument pdfReaderPhrases = new PdfDocument(new PdfReader(destPhrases));
merger.Merge(pdfReaderPhrases, 1, pdfReaderPhrases.GetNumberOfPages());
PdfDocument pdfReaderUncommonWords = new PdfDocument(new PdfReader(destUncommonWords));
merger.Merge(pdfReaderUncommonWords, 1, pdfReaderUncommonWords.GetNumberOfPages());
pdfCombined.Close();
So the combined PDF is a PDFWriter type of PdfDocument, and the merged pieces parts are PdfReader types of PdfDocuments, and the PdfMerger is the glue that binds it all together.
Here is the minimum C# code needed to merge file1.pdf into file2.pdf creating new merged.pdf:
var path = #"C:\Temp\";
var src0 = System.IO.Path.Combine(path, "merged.pdf");
var wtr0 = new PdfWriter(src0);
var pdf0 = new PdfDocument(wtr0);
var src1 = System.IO.Path.Combine(path, "file1.pdf");
var fi1 = new FileInfo(src1);
var rdr1= new PdfReader(fi1);
var pdf1 = new PdfDocument(rdr1);
var src2 = System.IO.Path.Combine(path, "file2.pdf");
var fi2 = new FileInfo(src2);
var rdr2 = new PdfReader(fi2);
var pdf2 = new PdfDocument(rdr2);
var merger = new PdfMerger(pdf0);
merger.Merge(pdf1, 1, pdf1.GetNumberOfPages());
merger.Merge(pdf2, 1, pdf2.GetNumberOfPages());
merger.Close();
pdf0.Close();
Here is a VB.NET solution using open source iText7 that can merge multiple PDF files to an output file.
Imports iText.Kernel.Pdf
Imports iText.Kernel.Utils
Public Function Merge_PDF_Files(ByVal input_files As List(Of String), ByVal output_file As String) As Boolean
Dim Input_Document As PdfDocument = Nothing
Dim Output_Document As PdfDocument = Nothing
Dim Merger As PdfMerger
Try
Output_Document = New iText.Kernel.Pdf.PdfDocument(New iText.Kernel.Pdf.PdfWriter(output_file))
'Create the output file (Document) from a Merger stream'
Merger = New PdfMerger(Output_Document)
'Merge each input PDF file to the output document'
For Each file As String In input_files
Input_Document = New PdfDocument(New PdfReader(file))
Merger.Merge(Input_Document, 1, Input_Document.GetNumberOfPages())
Input_Document.Close()
Next
Output_Document.Close()
Return True
Catch ex As Exception
'catch Exception if needed'
If Input_Document IsNot Nothing Then Input_Document.Close()
If Output_Document IsNot Nothing Then Output_Document.Close()
File.Delete(output_file)
Return False
End Try
End Function
USAGE EXAMPLE:
Dim success as boolean = false
Dim input_files_list As New List(Of String)
input_files_list.Add("c:\input_PDF1.pdf")
input_files_list.Add("c:\input_PDF2.pdf")
input_files_list.Add("c:\input_PDF3.pdf")
success = Merge_PDF_Files(input_files_list, "c:\output_PDF.pdf")
'Optional: handling errors'
if success then
'Files merged'
else
'Error merging files'
end if
So as the title says I am trying to add page numbers to an existing pdf document, I have researched this problem and come up with a few tutorials/examples.
Here is the simplest example i can find
My code Compiles and runs successfully however the changes are not reflected in the pdf
my code
byte[] bytes = File.ReadAllBytes(filePath + ".pdf");
PdfReader pdfReader = new PdfReader(bytes);
using (MemoryStream ms = new MemoryStream())
{
using (PdfStamper stamper = new PdfStamper(pdfReader, ms,'\0',true))
{
int n = pdfReader.NumberOfPages;
for (int i = 1; i <= n; i++)
{
creatPageCountFooter(i + 1, n).WriteSelectedRows(0, -1, 34, 803, stamper.GetOverContent(i));
//ColumnText.ShowTextAligned(stamper.GetUnderContent(i), Element.ALIGN_RIGHT, new Phrase(i.ToString(), blackFont), 568f, 15f, 0);
}
ms.ToArray();
}
pdfReader.Close();
}
File.WriteAllBytes(filePath + ".pdf", bytes);
the function "creatPageCountFooter"
/**
* Create a header table with page X of Y
* #param count the page number
* #param Total the total number of pages
* #return a table that can be used as header
*/
protected PdfPTable creatPageCountFooter(int count,int Total)
{
PdfPTable pageCount = new PdfPTable(3);
pageCount.TotalWidth=250;
BaseFont bfTimes = BaseFont.CreateFont(BaseFont.TIMES_ROMAN, BaseFont.CP1252, false);
iTextSharp.text.Font times = new iTextSharp.text.Font(bfTimes, 6);
PdfPCell Cell = new PdfPCell(new Phrase(DateTime.Now.ToString("dd MMM yyyy"), times));
Cell.HorizontalAlignment = Element.ALIGN_RIGHT;
Cell.Border = 0;
pageCount.AddCell(Cell);
Cell = new PdfPCell(new Phrase(count.ToString() +" / "+ Total.ToString(), times));
Cell.HorizontalAlignment = Element.ALIGN_MIDDLE;
Cell.Border = 0;
pageCount.AddCell(Cell);
Cell = new PdfPCell(new Phrase("Company name " + DateTime.Now.ToString("yyyy"), times));
Cell.HorizontalAlignment = Element.ALIGN_MIDDLE;
Cell.Border = 0;
pageCount.AddCell(Cell);
return pageCount;
}
As a further note I have checked that this code actually runs and I have tried writing the file over the existing document or creating a new document and both times the changes don't reflect.
I will provide further details if required.
Your code writes the byte[] bytes to a file:
File.WriteAllBytes(filePath + ".pdf", bytes);
But the only code in which that variable is set, is the initial
byte[] bytes = File.ReadAllBytes(filePath + ".pdf");
Thus, it is not surprising that the changes are not reflected in the pdf result file because you simply write the original bytes unchanged.
I assume you meant to set bytes to the contents of the memory stream in this line
ms.ToArray();
but forgot the bytes =. Unfortunately, though, that array retrieval call happens too early, it is still inside the using PdfStamper block:
using (PdfStamper stamper = new PdfStamper(pdfReader, ms,'\0',true))
{
...
ms.ToArray();
}
Just like in the sample you refer to, the array has to be retrieved outside that using block, so that it is retrieved after the PdfStamper implicitly gets closed during disposal. Thus:
using (PdfStamper stamper = new PdfStamper(pdfReader, ms,'\0',true))
{
...
}
bytes = ms.ToArray();
I am trying to Import Excel file through asp.net code. but I am getting ArgumentException when I am trying to create OleDbConnection
An OLE DB Provider was not specified in the ConnectionString. An
example would be, 'Provider=SQLOLEDB;'.
Here is the code
if (FileUpload1.HasFile)
{
string path = string.Concat((Server.MapPath("~/temp/"+FileUpload1.FileName)));
FileUpload1.PostedFile.SaveAs(path);
OleDbConnection oleCon = new OleDbConnection("Povider=Microsoft.Ace.OLEDB.12.0;Data Source="+path+";Extended Properties = Excel 12.0;");
OleDbCommand cmd = new OleDbCommand("select * from [Sheet1$]",oleCon);
OleDbDataAdapter dtap = new OleDbDataAdapter(cmd);
oleCon.Open();
DbDataReader rdr = cmd.ExecuteReader();
string con_str = #"Data source = .;Initial Catalog=practiceDB;Integrated security=True";
SqlBulkCopy bulkInsert = new SqlBulkCopy(con_str);
bulkInsert.DestinationTableName="Excel";
bulkInsert.WriteToServer(rdr);
oleCon.Close();
Array.ForEach(Directory.GetFiles((Server.MapPath("~/temp/"))),File.Delete);
Response.Write("<script>alert('Inserted')</script>");
By using OpenXML to manipulating a Word document (as a template), the server application saves the new content as a temporary file and then sends it to user to download.
The question is how to make these content ready to download without saving it on the server as a temporary file? Is it possible to save OpenXML result as a byte[] or Stream instead of saving it as a file?
Using this page:
OpenXML file download without temporary file
I changed my code to this one:
byte[] result = null;
byte[] templateBytes = System.IO.File.ReadAllBytes(wordTemplate);
using (MemoryStream templateStream = new MemoryStream())
{
templateStream.Write(templateBytes, 0, (int)templateBytes.Length);
using (WordprocessingDocument doc = WordprocessingDocument.Open(templateStream, true))
{
MainDocumentPart mainPart = doc.MainDocumentPart;
...
mainPart.Document.Save();
templateStream.Position = 0;
using (MemoryStream memoryStream = new MemoryStream())
{
templateStream.CopyTo(memoryStream);
result = memoryStream.ToArray();
}
}
}
You can create the WordprocessingDocument and then use the Save() method to save it to a Stream.
http://msdn.microsoft.com/en-us/library/cc882497
var memoryStream = new MemoryStream();
document.Clone(memoryStream);