C# Excel Interop COMException

Jason Anderson

15y26.6kC#

Hello.

I am getting this error:

"Exception Details: System.Runtime.InteropServices.COMException: Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))."

At this line:

Excel.Application xlApp = new Excel.Application();

I am using Visual Studio 2010 on SBS 2008 server.

I do not have Microsoft Excel installed on this SBS 2008 server.

Excel is installed on client computers.

This program is for a Web Application inside SharePoint 2010 that I want perform Excel tasks on the client-side.

Any suggestions on how to correct this error?

Thanks for your help.

3 Replies

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Rahul Prasad12y ago
hi Azam,

As Vulpes said, you need to have MS Excel installed on both developer and client machine if you're developing an application with the help of Microsoft.Office.Interop.Excel. If you want to manage Excel file without MS Excel, you need to use any other 3rd-party Excel tool I think.Good luck.
Azam Shaikh12y ago
I have OpenOffice Calc Installed on My Machine and I m facing Same Exception.Any solution?
Vulpes15y ago
Well, I'd be happy to be corrected, but my understanding is that you can develop an Excel interop application on a machine which doesn't have Excel installed using the primary interop library but you can't actually run it on that machine.

So, for practical purposes, Excel needs to be installed on the development machine.