Merge and split documents with GroupDocs.Merger Leave feedback

GroupDocs.Merger combines documents and rearranges their pages — join, split, extract, remove, reorder, rotate — and manages document passwords. It works on Word, PDF, spreadsheets, presentations, images and archives.

Warning

Save needs an absolute output path. Given a relative one it does nothing at all — no file, no exception, no error code:

merger.Save("merged.docx");                    // returns cleanly, writes nothing
merger.Save(Path.GetFullPath("merged.docx"));  // writes the file

Input paths passed to the constructor and to Join may be relative. Only the output path must be absolute, which is why every example below wraps it in Path.GetFullPath.

Join appends another document to the one you opened. Call it repeatedly to combine several, then Save.

using System.IO;
using GroupDocs.Merger;

using (Merger merger = new Merger("contract.docx"))
{
    merger.Join("statement-of-work.docx");

    merger.Save(Path.GetFullPath("merger-join-documents.docx"));
}

Binary file (DOCX, 16 KB)

ExtractPages keeps only the pages you name and discards the rest — useful for pulling a signed section or an appendix out of a long document.

using System.IO;
using GroupDocs.Merger;
using GroupDocs.Merger.Domain.Options;

using (Merger merger = new Merger("contract.pdf"))
{
    // Keep pages 1 to 3
    ExtractOptions extractOptions = new ExtractOptions(1, 3);

    merger.ExtractPages(extractOptions);
    merger.Save(Path.GetFullPath("merger-extract-pages.pdf"));
}

Binary file (PDF, 127 KB)

GetDocumentInfo reports the format, page count and page dimensions — worth checking before you extract a range that may not exist.

using System;
using GroupDocs.Merger;
using GroupDocs.Merger.Domain.Result;

using (Merger merger = new Merger("contract.pdf"))
{
    IDocumentInfo info = merger.GetDocumentInfo();

    Console.WriteLine("File type: " + info.Type.FileFormat);
    Console.WriteLine("Pages: " + info.PageCount);
    Console.WriteLine("Size: " + info.Size + " bytes");
}

File type: Portable Document Format File
Pages: 3
Size: 130412 bytes

GroupDocs.Merger also splits one document into several, removes, moves, swaps and rotates pages, changes page orientation, adds, updates and removes document passwords, generates page previews, and offers a fluent API for chaining operations.

• GroupDocs.Merger for .NET documentation — the full product guide
• Supported file formats
• API reference