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I have multiple PDF as bytes in database, I want to convert byte to PDF and merge all files in one PDF.

What I have tried:

<pre> private void DocumentFile()
            Document document = new Document();
             DataTable dTable = document.GetDocuments();
            if (dTable.Rows.Count > 0)
                foreach (DataRow row in dTable.Rows)
                    string contentType = dTable.Rows[0]["ContentType"].ToString();
                    string extension = dTable.Rows[0]["Extension"].ToString();
                    byte[] content = (byte[])dTable.Rows[0]["Content"];
                    MemoryStream ms = new MemoryStream(content);
                    Response.ContentType = contentType;
                    Response.AddHeader("Content-Disposition", "attachment; filename=\""
                        + "Doc" + extension + "\"");
                    Response.Buffer = true;

Updated 4-Jun-23 3:18am

1 solution

You can't just send multiple PDF files sequentially: you would need to combine them into a single PDF.
Google shows the way: Merge pdf files C# - Google Search[^]
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