Convert DOCX file to PDF file in C# and .NET


Complete code

using System;
using System.IO;
using System.Collections;

namespace Sample
{
    class Test
    {
        static void Main(string[] args)
        {
            // Convert DOCX to PDF in memory.
            // If you need more information about UseOffice .Net email us at:
            // support@sautinsoft.com.

            SautinSoft.UseOffice u = new SautinSoft.UseOffice();

            // We need files to read data from it and demostrate the result of conversion.
            string inpFile = Path.GetFullPath(@"..\..\..\..\..\Testing files\example.docx");
            string outFile = Path.GetFullPath("Result.pdf");

            // Prepare UseOffice .Net, loads MS Word in memory
            int ret = u.InitWord();

            // Return values:
            // 0 - Loading successfully
            // 1 - Can't load MS Word library in memory 
            if (ret == 1)
            {
                Console.WriteLine("Error! Can't load MS Word library in memory");
                return;
            }

            // Perform the conversion.
            byte[] docxBytes = File.ReadAllBytes(inpFile);
            byte[] pdfBytes = null;

            // If you are making the conversion on a server, please specify this temporary 
            // directory and set read/write permissions on it.
            // You may set any path.
            u.TemporaryDirectory = Path.GetTempPath();
            pdfBytes = u.ConvertBytes(docxBytes, SautinSoft.UseOffice.eDirection.DOCX_to_PDF);

            // Release MS Word from memory
            u.CloseWord();

            // 0 - Converting successfully
            // 1 - Can't open input file. Check that you are using full local path to input file, URL and relative path are not supported
            // 2 - Can't create output file. Please check that you have permissions to write by this path or probably this path already used by another application
            // 3 - Converting failed, please contact with our Support Team
            // 4 - MS Office isn't installed. The component requires that any of these versions of MS Office should be installed: 2000, XP, 2003, 2007, 2010, 2013, 2016 or 2019.
            if (pdfBytes != null)
            {
                // Open the result.
                File.WriteAllBytes(outFile, pdfBytes);
                System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(outFile) { UseShellExecute = true });
            }
            else
                Console.WriteLine("Error! Please contact with SautinSoft support: support@sautinsoft.com.");
        }

    }
}

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Imports System
Imports System.IO
Imports System.Collections

Namespace Sample
    Friend Class Test
        Shared Sub Main(ByVal args() As String)
            ' Convert DOCX to PDF in memory.
            ' If you need more information about UseOffice .Net email us at:
            ' support@sautinsoft.com.

            Dim u As New SautinSoft.UseOffice()

            ' We need files to read data from it and demostrate the result of conversion.
            Dim inpFile As String = Path.GetFullPath("..\..\..\..\Testing files\example.docx")
            Dim outFile As String = Path.GetFullPath("Result.pdf")

            ' Prepare UseOffice .Net, loads MS Word in memory
            Dim ret As Integer = u.InitWord()

            ' Return values:
            ' 0 - Loading successfully
            ' 1 - Can't load MS Word library in memory 
            If ret = 1 Then
                Console.WriteLine("Error! Can't load MS Word library in memory")
                Return
            End If

            ' Perform the conversion.
            Dim docxBytes() As Byte = File.ReadAllBytes(inpFile)
            Dim pdfBytes() As Byte = Nothing

            ' If you are making the conversion on a server, please specify this temporary 
            ' directory and set read/write permissions on it.
            ' You may set any path.
            u.TemporaryDirectory = Path.GetTempPath()
            pdfBytes = u.ConvertBytes(docxBytes, SautinSoft.UseOffice.eDirection.DOCX_to_PDF)

            ' Release MS Word from memory
            u.CloseWord()

            ' 0 - Converting successfully
            ' 1 - Can't open input file. Check that you are using full local path to input file, URL and relative path are not supported
            ' 2 - Can't create output file. Please check that you have permissions to write by this path or probably this path already used by another application
            ' 3 - Converting failed, please contact with our Support Team
            ' 4 - MS Office isn't installed. The component requires that any of these versions of MS Office should be installed: 2000, XP, 2003, 2007, 2010, 2013, 2016 or 2019.
            If pdfBytes IsNot Nothing Then
                ' Open the result.
                File.WriteAllBytes(outFile, pdfBytes)
                System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(outFile) With {.UseShellExecute = True})
            Else
                Console.WriteLine("Error! Please contact with SautinSoft support: support@sautinsoft.com.")
            End If
        End Sub

    End Class
End Namespace

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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.