Nasosoft.Documents.Pdf offers the capability to manipulate pdf documents. It allows you to:

Here's a simple example:

1     PdfDocumentEditor pdfEditor = new PdfDocumentEditor("file1.pdf");
2     pdfEditor.Insert(1, "file2.pdf", new int[] { 0, 1 });
3     pdfEditor.Insert(5, "file2.pdf", new int[] { 2, 3 });
4     pdfEditor.Merge("file3.pdf");
5     pdfEditor.Append("file4.pdf", 0, 4);
6
7     pdfEditor.Save("Insert_Merge_Append.pdf");
8     pdfEditor.Close();


Line1: Create a new PdfDocumentEditor object, set "file1.pdf" as current pdf document.
Line2: Insert page 0 and 1 from file2.pdf to file1.pdf, at location page 1. (All page index is 0-based)
Line3: Again, insert page 2 and 3 from file2.pdf to file1.pdf at location page 5.
Line4: Merge file3.pdf to current pdf object (That is, the file1.pdf after insert operations)
Line5: Append page 0~4 from file4.pdf to the end of current pdf object
Line7: Save the result to a new file.

The operations on pdfEditor won't reflect to the original file on disk, but you have to save it to a new one.
After pdfEditor.close(), the object is considered disposed, no longer available.



Here's another example on how to use page split:

1     PdfDocumentEditor pdfEditor = new PdfDocumentEditor("file1.pdf");
2     pdfEditor.SplitToPages("file1_page_{0}.pdf");
3     pdfEditor.Close();

This one is easy, the only thing need to mention is "{0}" inside "file1_page_{0}.pdf", it act as a placeholder for page index (0, 1, 2, ...) in destination filename. So the single-page pdf document will be named after "file1_page_0.pdf", "file1_page_1.pdf", ...


Also, there is an overloaded version gives you an array of MemoryStream, with each MemoryStream contains one single-page pdf document. It offers you the versatility how to handle them:

1     MemoryStream[] outStreams = null;
2     PdfDocumentEditor pdfEditor = new PdfDocumentEditor("file1.pdf");
3
4     pdfEditor.SplitToPages(out outStreams);
5     for (int index = 0; index < outStreams.Length; ++index)
6     {
7           FileStream file = new FileStream(String.Format("out_{0}.pdf", index), FileMode.Create);
8           outStreams[index].WriteTo(file);
9           file.Close();
10    }
11    pdfEditor.Close();


Cheers!