How to combine selected pdf in to one pdf in C#

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i want to view the file explorer in my windows forms listview and select file from the list view using checkbox .. it is working ... now i want to combine all the selected pdf in to one pdf .. it is working with direct path but i want to combine these using the combo box items. selected path s coming in combo box but combining isnt working

help me plzz

What I have tried:

C#

{
    string[] lstFiles = new string[comboBox1.Items.Count];
    for (int indexInteger = 0; indexInteger < comboBox1.Items.Count; indexInteger++)
    {
        lstFiles[indexInteger] = comboBox1.Items[indexInteger].ToString();
    }
            //comboBox1.Text=comboBox1.Items[0].ToString();
            //string[] lstFiles = new string[3];

            //lstFiles[0] = comboBox1.Items[0].ToString();
            //lstFiles[1] = comboBox1.Items[1].ToString();
            //lstFiles[2] = comboBox1.Items[2].ToString();

            //string a = lstFiles[0].ToString();
            ////lstFiles[0] = @"C:\Users\RASH\Documents\AERCEL\New Files\160216 BMC Rayyan Road Project 7 Protection Board.pdf";
            //lstFiles[1] = @"C:\Users\RASH\Documents\AERCEL\New Files\AERCEL SP 20 - TDS.pdf";
            //lstFiles[2] = @"C:\Users\RASH\Documents\AERCEL\New Files\BMC QATAR WLL PLG letter.pdf";

            iTextSharp.text.pdf.PdfReader reader = null;
            iTextSharp.text.Document sourceDocument = null;
            PdfCopy pdfCopyProvider = null;
            PdfImportedPage importedPage;
            string outputPdfPath = @"D:/1.pdf";
            //axAcroPDF1.src = outputPdfPath;

            sourceDocument = new iTextSharp.text.Document();
            pdfCopyProvider = new PdfCopy(sourceDocument, new System.IO.FileStream(outputPdfPath, System.IO.FileMode.Create));

            //Open the output file
            sourceDocument.Open();
//axAcroPDF1.src = outputPdfPath;
            try
            {
                //Loop through the files list
                for (int f = 0; f <= lstFiles.Length-1 ; f++)
                {
                    int pages = get_pageCcount(lstFiles[f]);

                    reader = new PdfReader(lstFiles[f]);
                    //Add pages of current file
                    for (int i = 1; i <= pages; i++)
                    {
                        importedPage = pdfCopyProvider.GetImportedPage(reader, i);
                        pdfCopyProvider.AddPage(importedPage);
                    }

                    reader.Close();
                }
                //At the end save the output file
                sourceDocument.Close();
                axAcroPDF1.src = outputPdfPath;
            }
            catch (Exception ex)
            {
                throw ex;
            }

        }
private int get_pageCcount(string file)
{
    using (StreamReader sr = new StreamReader(File.OpenRead(file)))
    {
        Regex regex = new Regex(@"/Type\s*/Page[^s]");
        MatchCollection matches = regex.Matches(sr.ReadToEnd());

        return matches.Count;
    }
}

trying with direct path it is working but trying to give path from combox it showing error in catch

Posted 5-Jun-16 4:25am

Rashad Hameed

Updated 6-Jun-16 12:09pm

Richard MacCutchan

v2

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Comments

Richard MacCutchan 5-Jun-16 11:28am

What error?

Rashad Hameed 5-Jun-16 11:53am

the document has no page root invalid pdf file

CHill60 5-Jun-16 12:07pm

On which line is the exception originally thrown?

1 solution

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cexxx · Answer 1 · 2016-06-06T12:09:00

With ItextSharp

C#

public void MergePDFs(string[] PoArchivos, string PsOutFile, string PsClave)
        {
            PoArchivos = OrdenarArchivosSegunClave(PoArchivos, PsClave);
            
            // step 1: creation of a document-object
            Document LoDocument = new Document();

            // step 2: we create a writer that listens to the document
            if(File.Exists(PsOutFile))
            {
                File.Delete(PsOutFile);
            }
            PdfCopy LoWriter = new PdfCopy(LoDocument, new FileStream(PsOutFile, FileMode.Create));
            if (LoWriter == null)
            {
                return;
            }

            // step 3: we open the document
            LoDocument.Open();
            foreach (string fileName in PoArchivos)
            {
                // we create a reader for a certain document
                PdfReader LoReader = new PdfReader(fileName);
                LoReader.ConsolidateNamedDestinations();
                
                // step 4: we add content
                for (int i = 1; i <= LoReader.NumberOfPages; i++)
                {
                    PdfImportedPage page = LoWriter.GetImportedPage(LoReader, i);
                    LoWriter.AddPage(page);
                }
                
                LoReader.Close();
            }

            // step 5: we close the document and writer
            LoWriter.Close();
            LoDocument.Close();
        }