This article we will demonstrate how to convert the PDF pages to HTML, Word, SVG, XPS, PDF and save them to stream by calling the method PdfDocument.SaveToStream() offered by Spire.PDF. And starts from Spire.PDF version 4.3, it newly supports to convert the defined range of PDF pages and save them to stream.

Save the PDF to stream

Step 1: Create a new PdfDocument instance and load the sample document from file.

PdfDocument pdf = new PdfDocument();
pdf.LoadFromFile("Sample.pdf");

Step 2: Save the document to stream.

MemoryStream ms=new MemoryStream ();
pdf.SaveToStream(ms);

Save the PDF to stream and defined the file format to HTML, Word, SVG, XPS and PDF

Step 1: Create a new PdfDocument instance and load the sample document from file.

PdfDocument pdf = new PdfDocument();
pdf.LoadFromFile("Sample.pdf");

Step 2: Save the document to stream and use FileFormat format to define the format.

MemoryStream ms=new MemoryStream ();
pdf.SaveToStream(ms, FileFormat.HTML);

Convert the defined range of PDF pages to HTML, word, SVG, XPS and save them to stream

Step 1: Create a new PdfDocument instance and load the sample document from file.

PdfDocument pdf = new PdfDocument();
pdf.LoadFromFile("Sample.pdf"); 

Step 2: Only save some PDF pages to stream by using pdf.SaveToStream(int startIndex, int endIndex, FileFormat format) method; and FileFormat.PDF is not supported.

pdf.SaveToStream(1, 2, FileFormat.SVG);

Full codes of save PDF to stream:

using Spire.Pdf;
using System.IO;


namespace SavePDFToStream
{
    class Program
    {
        static void Main(string[] args)
        {
            PdfDocument pdf = new PdfDocument();

            pdf.LoadFromFile("Sample.pdf");

            MemoryStream ms = new MemoryStream();
            pdf.SaveToStream(ms);
            pdf.SaveToStream(ms, FileFormat.HTML);

            pdf.SaveToStream(1, 2, FileFormat.SVG);
        }
    }
}