Solved

Issue with adding Excel COM reference in VS 2005 using Office 2003

Posted on 2011-02-16
6
290 Views
Last Modified: 2012-05-11
I have an application that was created using office 2003 and the Microsoft.Office.Interop.Excel.dll.  Everything has worked great for a year or so with the portion of the app that writes to Excel.  My pc was recently upgraded to Office 2010...so I had to remove the old and add the new references for Excel...again...no issues.  The problem was though, the app runs from Citrix, and since it has Office 2003, I needed to change them back...fine...no worries right?

Well, I made the changes on a pc with Office 2003, ran the app locally...everything worked.  Placed the app on the server and the Excel portion blows up.  It appears that when I added the Office 2K3 reference back in, it is now using Interop.Excel.dll...a different dll then what it was using before.

Now, I can just replace that other dll with the one it is currently using, but I want to know why it is using Interop.Excel.dll as opposed to Microsoft.Office.Interop.Excel.  I have tried this on a few pc's with Office 2K3 and I get the same result.
0
Comment
Question by:rgn2121
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
6 Comments
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 34906156
because you are targeting a different version, you have 2 options here:
-switch to late binding (do not add a reference and use GetObject to create your instance)
-use a 3rd party application like http://www.aspose.com/categories/.net-components/aspose.cells-for-.net/default.aspx
0
 
LVL 12

Author Comment

by:rgn2121
ID: 34906242
I am targeting Office 2003...only Office 2003.  The last time I add the reference it used Microsoft.Office.Interop.Excel.dll.  Now it uses Interop.Excel.dll...both for Office 2K3 (Office 11)
0
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 34906316
you are targeting Office 2003 but you have something different installed on your PC!
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 12

Author Comment

by:rgn2121
ID: 34906337
I have 2K3 on the PC's that I am developing on today...I have tried 2 office 2k3 pc's as stated above...
0
 
LVL 12

Accepted Solution

by:
Hairbrush earned 500 total points
ID: 34914669
Microsoft.Office.Interop.Excel.dll is a "Primary Interop Assembly" (PIA) which is the "official" interop assembly as distributed by Microsoft.  It is strongly named and installed in the GAC. The intention is that this assembly is used by all applications that need to call the Excel API.  (IF you have multiple versions of Office then you may have more than one Microsoft.Office.Interop.Excel.dll in your GAC as they will have different signatures - the version number will be different)

Your Interop.Excel.dll sounds like it has been generated by creating a reference directly to the Excel.exe COM object.  Microsoft recommends against referencing the Office applications in this way.  See the third article below.

Sounds like you do not have the Office 2003 PIAs on the server.  You can check by looking in the GAC.

http://msdn.microsoft.com/en-us/library/aax7sdch.aspx
http://msdn.microsoft.com/en-us/library/kh3965hw(VS.80).aspx
http://msdn.microsoft.com/en-us/library/dww0e04a(VS.80).aspx

Hope this helps.
0
 
LVL 12

Author Comment

by:rgn2121
ID: 34960317
Thanks Hairbrush...I was adding my references the way link 3 described, but it kept choosing the Interop.Excel.dll.  One pc had the Office 2003 PIA's installed the other did not.  I installed them on the pc that needed them and it selected the correct dll.  I found out that from another developer in my dept that he has to do this almost every time there is an office update...I just didn't know it since it had been so long since I have been in this application.

Thanks for the links...
0

Featured Post

Free Tool: Postgres Monitoring System

A PHP and Perl based system to collect and display usage statistics from PostgreSQL databases.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Although it can be difficult to imagine, someday your child will have a career of his or her own. He or she will likely start a family, buy a home and start having their own children. So, while being a kid is still extremely important, it’s also …
This code takes an Excel list of URL’s and adds a header titled “URL List”. It then searches through all URL’s in column “A”, looking for duplicates. When a duplicate is found, it is moved to the top of the list. The duplicate URL’s are then highlig…
In this fifth video of the Xpdf series, we discuss and demonstrate the PDFdetach utility, which is able to list and, more importantly, extract attachments that are embedded in PDF files. It does this via a command line interface, making it suitable …

730 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question