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Helper class to load WinWord

, 28 Nov 2002
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Simple class to load/unload WinWord (or any other OLE application)

Introduction

In applications I develop, I often use Microsoft Word to generate various documents (reports, agendas, invoices, etc). The code to load and shut down the WinWord's COM server was always the same, so I wrote a simple helper class which manages this.

The Code

using System;
using System.Threading;
using System.Runtime.InteropServices;

namespace AlexKay.Office
{
    /// <summary>
    /// Helper class to manage the Word.Application coclass.
    /// </summary>
    public class WordLoader : IDisposable
    {
        private Word.Application wordApp = null;
        private bool isNewApp = false;

        private bool disposed = false;
        
        public WordLoader()
        {
            // Check if Word is registered in the ROT.
            try
            {
                wordApp = (Word.Application)Marshal.
                    GetActiveObject("Word.Application");
            }
            catch
            {
                wordApp = null;
            }
            // Load Word if it's not.
            if(wordApp == null)
            {
                try
                {
                    wordApp = new Word.ApplicationClass();
                    isNewApp = true;
                }
                catch
                {
                    wordApp = null;
                }
            }
        }

        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }

        protected virtual void Dispose(bool disposing)
        {
            if(!this.disposed)
            {
                if(disposing)
                {
                    // Dispose managed resources.
                }
                
                // Dispose unmanaged resources.
                if(wordApp != null)
                {
                    try
                    {
                        if(isNewApp && wordApp.Documents.Count == 0)
                        {
                            object arg1 = Word.WdSaveOptions.
                                            wdDoNotSaveChanges;
                            object arg2 = null;
                            object arg3 = null;
                            wordApp.Quit(ref arg1, ref arg2, ref arg3);

                            // Wait until Word shuts down.
                            for(;;)
                            {
                                Thread.Sleep(100);
                                try
                                {
                                    // When word shuts down this call 
                                    // throws an exception.
                                    string dummy = wordApp.Version;
                                }
                                catch
                                {
                                    break;
                                }
                            }
                        }
                    }
                    catch {}

                    wordApp = null;
                }
            }
            disposed = true;
        }

        ~WordLoader()
        {
            Dispose(false);
        }

        public Word.Application Application
        {
            get
            {
                return wordApp;
            }
        }
    }
}

Comments

When the WordLoader object is created, it checks if the Word co-class is already created and registered in the running object table. If it's not, it creates a new instance of the Word.Application co-class which loads the WinWord application. When the WordLoader object is disposed it shuts down Word, if it has no documents open.

As you can see, this is quite simple. Any comments on the code are welcome!

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

About the Author

Alexander Kojevnikov
Software Developer (Senior)
Australia Australia
No Biography provided

Comments and Discussions

 
QuestionMarshall.getactiveobject(word.application) does not works for windows services ? Pinmembermuneebalikiyani26-Feb-13 1:05 
GeneralSlowly. Pinmember123456uio5-Feb-07 22:41 
GeneralA problem. Pinmembershir118-Sep-06 22:29 
GeneralSuggestion Pinmemberxlg8-Aug-06 5:59 
GeneralSweet PinmemberElNoNo12-Apr-06 11:13 
GeneralWinWord in AxWebBrowser Pinmemberpramod.21c22-Feb-06 19:17 

hi,
I am using webbrowser control to load a word document.
The problem is as soon as i open any word document outside in the window,
my word document inside webbrowser gets locked i.e it becomes non-editable
 
Also Page up,Page Down and View(Normal,print,web) button gets disable.
GeneralDoubt.. PinmemberDevangUdeshi3018217-Apr-05 20:27 
GeneralRe: Doubt.. PinmemberAlexander Kojevnikov19-Apr-05 9:31 
GeneralWordAutomation Examples PinmemberNickle31-Dec-02 10:14 
GeneralRe: WordAutomation Examples PinmemberAlexandre Kojevnikov3-Feb-03 22:27 
GeneralSorry to tell you this... PinmemberDavid Stone29-Nov-02 11:04 
GeneralRe: Sorry to tell you this... PinmemberMarc Clifton29-Nov-02 12:02 
GeneralRe: Sorry to tell you this... PinmemberJörgen Sigvardsson29-Nov-02 14:04 
GeneralRe: Sorry to tell you this... PineditorNishant S29-Nov-02 15:13 
GeneralRe: Sorry to tell you this... PinmemberMarc Clifton29-Nov-02 12:05 
GeneralRe: Sorry to tell you this... PineditorNishant S29-Nov-02 15:12 
GeneralRe: Sorry to tell you this... PinmemberAlex Kay30-Nov-02 6:47 
GeneralRe: Sorry to tell you this... PinmemberDavid Stone30-Nov-02 13:18 
GeneralRe: Sorry to tell you this... Pinmembershofb1-May-08 23:25 

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