How to read big Excel Files using C#

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Hello All,

I have some big excel files (XLS and XLSX files approximately 250 megabytes each) which I want to read in my .NET windows applications. I have tried OLEDB uing both ACE and JET database providers. Both of them give "Driver Error" as soon as I call Open() method of connection. ACE driver fails to do the job.

I don't want to use Excel Inter-op as end user's machine don't have Office installed and I can't use any third party paid components. I tried free components like OpenXML reader and other alternates but they fail.

Kindly suggest me some solution ASAP. Thanks in advance for help. :)

Posted 8-Aug-14 3:24am

Rubal Walia

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Richard Deeming 8-Aug-14 9:39am

Have you tried NPOI[^]?

Richard MacCutchan 8-Aug-14 12:50pm

Perhaps you should try to find out why it gives a driver error.

[no name] 8-Aug-14 14:03pm

It's hard to believe that everything you try "fails" when hundreds and thousands of other people are successful doing exactly this. I used OLEDB just 3 days ago in an application to read an Excel file with no trouble at all.

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Mehdi Gholam · Answer 1 · 2014-08-08T06:49:00

Solution 1

250Mb will be a problem with MS Excel also, try creating smaller files.

Also try this component : http://epplus.codeplex.com/[^]

Posted 8-Aug-14 6:49am

Mehdi Gholam