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Editorial Team
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Asked: 2026-05-17T18:43:10+00:00

I am developing a job application. Each job generates an excel file. I will

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I am developing a job application. Each job generates an excel file. I will have 50 parallel job. So 50 excel files will be generated parallelly.

I am using C#3.5 and Excel 2003. The problem is I am unable to instantiate more Excel objects. I am getting COMException. So do I need to create excel processing only one at a time? Do you have any solution for this?

Pls help me.

Edit:

The excel genration doesn’t need user interaction. Its a scheduled job.

I am generating Excel (xls). I need to do formatting and coloring in excel, so I can’t use csv. Now I have synchronized the code, so at a time only one job processes Excel. But its taking too much time, since only one excel processing at a time.

Any kind of Excel pooling logic will help? Please direct me.

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1 Answer

  1. Editorial Team

    To do this you would need to start 50 instances of Excel, that would not work.

    You have 3 options:

    • Use Open XML SDK 2.0 for Microsoft Office. This allows you to write to an excel file as if it was an xml file. No need to start Excel.
    • Use SharePoint Excel Services. This allows you to do server side Excel processing. No need to start Excel. The problem with this is that the SharePoint version that includes Excel Services is expensive.
    • Process the files one at a time, as you suggested.
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