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Asked: 2026-05-26T13:29:17+00:00

I used the code described here to update an excel sheet using c#. The

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I used the code described here to update an excel sheet using c#.
The problem is that the file gets locked and cannot be edited manually while it is being updated (unlike the example code, i am doing constant updates, realtime data feed)
Since it is a trading application, operators need to be able to add excel formulas while other cells are being updated.

I am new to this and open to switch to any other technology/architecture making this possible.
I am receiving a data feed and I just want to put in an excel file and update it in realtime while making it possible for sheets to be edited manually.

I guess if the dll or add-in is called from within excel rather than oledb I would not have such a lock issue. So if there is any way to call my code from excel and not the other way round (not too painstaking if possible) I welcome any suggestion

EDIT : Solution
I finally opted for RTD Technology for Excel which is exactly what I was looking for.
MS Reference is 10 years old and VBA oriented but it gives the big guidelines and things did not change much since. I think I would not have made it through without Kenny Kerr’s Artcile on the subject.
Many thanks to him.

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1 Answer

  1. Editorial Team

    You will need to integrate into Excel itself… Excel offers an interface to achieve exactly what you describe… it is based on COM and called RTD (Realtime Data-Server) and gets called from Excel.

    You have to build a COM component which adheres to the official spec…

    Some usfeul links to get you started:

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