Convert DOCX to PDF format within C# and .NET

  1. Add SautinSoft.Document from Nuget.
  2. Load an input document.
  3. Save to a PDF format.

Document .Net can help your application to convert a document from a one format to another.
You'll need only to Load() a document and Save() to a desired format:


            DocumentCore dc = DocumentCore.Load("...");
            dc.Save("....");

Document .Net supports these formats:

PDF DOCX RTF HTML Text Image
Create/Read/Write Create/Read/Write Create/Read/Write Create/Read/Write Create/Read/Write Create/Read(OCR)/Write

Conversion examples:

  1. Convert DOCX to PDF:

                DocumentCore dc = DocumentCore.Load(@"d:\Before.docx");
            dc.Save(@"d:\After.pdf");
  2. Convert DOCX to PDF (in memory): 
    byte[] docxBytes = ....; // Say, get DOCX bytes from DB or another Data resource.
            byte[] pdfBytes = null;
            using (MemoryStream msDocx = new MemoryStream(docxBytes))
            {
                DocumentCore dc = DocumentCore.Load(msDocx, new DocxLoadOptions());
                using (MemoryStream msPdf = new MemoryStream())
                {
                    dc.Save(msPdf, new PdfSaveOptions());
                    pdfBytes = msPdf.ToArray();
                }
            }

  3. Convert DOCX to PDF (with options):

                DocumentCore dc = DocumentCore.Load(@"d:\Before.pdf",
                new PdfLoadOptions()
                {DetectTables=true,
                ConversionMode = PdfConversionMode.Continuous,
                PageIndex=0,
                PageCount=1});

            dc.Save(@"d:\After.html", new HtmlFixedSaveOptions()
            {Version = HtmlVersion.Html5,
            CssExportMode = CssExportMode.Inline,
            EmbedImages = true});
 

Complete code

using System.IO;
using SautinSoft.Document;

namespace Example
{
    class Program
    {
        static void Main(string[] args)
        {
            // Get your free 30-day key here:   
            // https://sautinsoft.com/start-for-free/

            ConvertFromFile();
            ConvertFromStream();
        }

        /// <summary>
        /// Convert DOCX to PDF (file to file).
        /// </summary>
		/// <remarks>
        /// Details: https://sautinsoft.com/products/document/help/net/developer-guide/convert-docx-to-pdf-in-csharp-vb.php
        /// </remarks>
        static void ConvertFromFile()
        {
            string inpFile = @"..\..\..\example.docx";
            string outFile = @"Result.pdf";

            DocumentCore dc = DocumentCore.Load(inpFile);
            dc.Save(outFile);

            // Open the result for demonstration purposes.
            System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(outFile) { UseShellExecute = true });
        }

        /// <summary>
        /// Convert DOCX to PDF (using Stream).
        /// </summary>
		/// <remarks>
        /// Details: https://sautinsoft.com/products/document/help/net/developer-guide/convert-docx-to-pdf-in-csharp-vb.php
        /// </remarks>
        static void ConvertFromStream()
        {

            // We need files only for demonstration purposes.
            // The conversion process will be done completely in memory.
            string inpFile = @"..\..\..\example.docx";
            string outFile = @"ResultStream.pdf";
            byte[] inpData = File.ReadAllBytes(inpFile);
            byte[] outData = null;

            using (MemoryStream msInp = new MemoryStream(inpData))
            {

                // Load a document.
                DocumentCore dc = DocumentCore.Load(msInp, new DocxLoadOptions());

                // Save the document to PDF format.
                using (MemoryStream outMs = new MemoryStream())
                {
                    dc.Save(outMs, new PdfSaveOptions() );
                    outData = outMs.ToArray();                    
                }
                // Show the result for demonstration purposes.
                if (outData != null)
                {
                    File.WriteAllBytes(outFile, outData);
                    System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(outFile) { UseShellExecute = true });
                }
            }
        }
    }
}

Download

Imports System
Imports System.IO
Imports SautinSoft.Document

Module Sample
    Sub Main()
        ConvertFromFile()
        ConvertFromStream()
    End Sub
    ''' Get your free 30-day key here:   
    ''' https://sautinsoft.com/start-for-free/
    ''' <summary>
    ''' Convert DOCX to PDF (file to file).
    ''' </summary>
    ''' <remarks>
    ''' Details: https://sautinsoft.com/products/document/help/net/developer-guide/convert-docx-to-pdf-in-csharp-vb.php
    ''' </remarks>
    Sub ConvertFromFile()
        Dim inpFile As String = "..\..\..\example.docx"
        Dim outFile As String = "Result.pdf"

        Dim dc As DocumentCore = DocumentCore.Load(inpFile)
        dc.Save(outFile)

        ' Open the result for demonstration purposes.
        System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(outFile) With {.UseShellExecute = True})
    End Sub

    ''' <summary>
    ''' Convert DOCX to PDF (using Stream).
    ''' </summary>
    ''' <remarks>
    ''' Details: https://sautinsoft.com/products/document/help/net/developer-guide/convert-docx-to-pdf-in-csharp-vb.php
    ''' </remarks>
    Sub ConvertFromStream()

        ' We need files only for demonstration purposes.
        ' The conversion process will be done completely in memory.
        Dim inpFile As String = "..\..\..\example.docx"
        Dim outFile As String = "ResultStream.pdf"
        Dim inpData() As Byte = File.ReadAllBytes(inpFile)
        Dim outData() As Byte = Nothing

        Using msInp As New MemoryStream(inpData)

            ' Load a document.
            Dim dc As DocumentCore = DocumentCore.Load(msInp, New DocxLoadOptions())

            ' Save the document to PDF format.
            Using outMs As New MemoryStream()
                dc.Save(outMs, New PdfSaveOptions())
                outData = outMs.ToArray()
            End Using
            ' Show the result for demonstration purposes.
            If outData IsNot Nothing Then
                File.WriteAllBytes(outFile, outData)
                System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(outFile) With {.UseShellExecute = True})
            End If
        End Using
    End Sub
End Module

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If you need a new code example or have a question: email us at support@sautinsoft.com or ask at Online Chat (right-bottom corner of this page) or use the Form below:


Questions and suggestions from you are always welcome!

We are developing .Net components since 2002. We know PDF, DOCX, RTF, HTML, XLSX and Images formats. If you need any assistance with creating, modifying or converting documents in various formats, we can help you. We will write any code example for you absolutely free.