Convert of word file(.docx & doc) to .pdf using c# is not working

Question

I am using visualstudio 2010 and I am trying to convert word.docx file to .pdf file and is working fine in local but on run time on server it is showing error as

Could not load file or assembly 'office, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' or one of its dependencies. The system cannot find the file specified.

What I have tried is added reference and put in bin folder

Microsoft.Office.Interop.Word.dll
Microsoft.Office.Interop.Word.xml

as shown in figure

my .cs code is as

Microsoft.Office.Interop.Word.Application wordApp = new Microsoft.Office.Interop.Word.Application();

 wordApp.Visible = false;

            // file from
 object filename =Server.MapPath("word.docx"); // input

    // file to
 object newFileName = Server.MapPath("pdf/document_to_read_tomorrow.pdf"); // output
 object missing = System.Type.Missing;

            // open document
 Microsoft.Office.Interop.Word.Document doc = wordApp.Documents.Open(ref filename, ref missing, ref missing, ref missing, ref missing, ref missing,
                ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing,
                ref missing, ref missing, ref missing);

            // formt to save the file, this case PDF
 object formatoArquivo = Microsoft.Office.Interop.Word.WdSaveFormat.wdFormatPDF;

            // changes in paper size

 doc.PageSetup.PaperSize = Microsoft.Office.Interop.Word.WdPaperSize.wdPaperA4;

            // changes orietation paper
 doc.PageSetup.Orientation = Microsoft.Office.Interop.Word.WdOrientation.wdOrientPortrait;

            // other changes
 doc.PageSetup.LeftMargin = 20;
 doc.PageSetup.RightMargin = 0;


            // save file
 doc.SaveAs(ref newFileName, ref formatoArquivo, ref missing, ref missing, ref missing, ref missing, ref missing,
                ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing);

 doc.Close(ref missing, ref missing, ref missing);

 wordApp.Quit(ref missing, ref missing, ref missing);

My WebConfig seems as

<?xml version="1.0"?>
<configuration>
<connectionStrings>
    <add name="xyz" connectionString="Data Source=xyz;Initial Catalog=xyz;Persist Security Info=True;User ID=xyz;Password=xyz" providerName="System.Data.SqlClient"/>
</connectionStrings>
<system.web>
    <httpHandlers>
        <add verb="GET" path="CaptchaImage.axd" type="MSCaptcha.CaptchaImageHandler, MSCaptcha"/>
        <add path="Reserved.ReportViewerWebControl.axd" verb="*" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" validate="false"/>
    </httpHandlers>
    <compilation debug="true" targetFramework="4.0">
        <assemblies>
            <add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
            <add assembly="Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
            <add assembly="Microsoft.ReportViewer.Common, Version=10.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
            <add assembly="Microsoft.Build.Framework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
            <add assembly="System.Management, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
            <add assembly="Microsoft.Office.Interop.Word, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71E9BCE111E9429C"/></assemblies>
        <buildProviders>
            <add extension=".rdlc" type="Microsoft.Reporting.RdlBuildProvider, Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
        </buildProviders>
    </compilation>
    <customErrors mode="Off">
    </customErrors>
    <sessionState timeout="720">
    </sessionState>
    <pages enableViewStateMac="false"/>
</system.web>
<system.webServer>
    <defaultDocument>
        <files>
            <clear/>
            <add value="default.aspx"/>
        </files>
    </defaultDocument>
    <validation validateIntegratedModeConfiguration="false"/>
    <handlers>
        <add name="ReportViewerWebControlHandler" preCondition="integratedMode" verb="*" path="Reserved.ReportViewerWebControl.axd" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
    </handlers>
</system.webServer>
</configuration>

Answer 1

It is not recommended to use the Office interop in a server environment due to the memory leaks and perfomance issues. You will have to look for a managed solution to convert PDF to word in a server, than installing the office package and the interop assemblies there. There are a few managed components which can get the work done, but they are not free.

http://www.aspose.com/.net/pdf-component.aspx http://www.websupergoo.com/wordglue-1.htm

Answer 2

I had long been looking for a solution to these issues and in the end I had to use a third party. I suggest you use a third party like Aspose Aspose.Total for .NET

Aspose.Words for .NET is an advanced class library for .NET that enables you to perform a wide range of document processing tasks directly within your .NET applications.

With Aspose.Words you can generate, modify, convert, render and print documents without using Microsoft Word.

Aspose.Words for .NET supports DOC, OOXML, RTF, HTML, OpenDocument, PDF, XPS, EPUB and many other formats.

This component work perfectly for me and very simple to use. this is an example of convert word to pdf code :

Document doc = new Document(getMyDir() + "Document.doc");
doc.save(getMyDir() + "Document.Doc2PdfSave Out.pdf");

Answer 3

You will need to install the "office.dll" library in the Global Assembly Cache on the server too to make this work. Check out the C:\\Windows\\assembly folder and you will find office.dll there.

EDIT: It seems that this will not be as simple as it looks. Some developers mention here that Office would have to be installed on the server or you will need to install even more libraries manually.