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Asked: 2026-05-25T15:42:52+00:00

I have an existing business application written in Excel which the client would like

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I have an existing business application written in Excel which the client would like to make accessible on the web.

I started off thinking I would have to reimplement it, however it has occurred to me that it would make the job much easier, maintain the knowledge and value in the spreadsheet and make the new tool more flexible if I could connect the existing spreadsheet as a data source from ASP.NET and use it as an engine.

This sounded like a good solution until I considered that Excel would spawn a new process for each connection and we would likely get locking issues.

Is this assumption correct? Is there a component that I could use to manage this?

Note: I have seen Excel Services but Sharepoint is not an option. The application will be a public facing website but only some users will be allowed to access the application. Conservative estimate: 1000 monthly active users of which half have paid to access the application.

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  1. Editorial Team

    Office automation is NOT supported by MS in this scenario…

    MS provides the OpenXML SDK V 2.0 – see http://msdn.microsoft.com/en-us/library/bb448854%28office.14%29.aspx

    This can read+write MS Office files (including Excel)…

    Another option see http://www.codeproject.com/KB/office/OpenXML.aspx

    IF you need more like rendering, formulas etc. then there are different commercial libraries like Aspose.Cells and Flexcel and Spreadsheetgear…

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