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Home/ Questions/Q 889895
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Editorial Team
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Editorial Team
Asked: May 15, 20262026-05-15T13:38:20+00:00 2026-05-15T13:38:20+00:00

NPOI is a .NET port of the Java POI project, which allows one to

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NPOI is a .NET port of the Java POI project, which allows one to read and write Microsoft Excel documents (as well as other Office formats). NPOI 1.2.2 has introduced support for ‘autosizing’ columns, whereby the column is set to the width of the widest cell entry in the column. However, there are many reports that this does not work. So is it possible?

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  1. Editorial Team
    Editorial Team
    2026-05-15T13:38:21+00:00Added an answer on May 15, 2026 at 1:38 pm

    I’ve posted this just to answer it, so as to provide a record. It is possible to make columns autosized using NPOI, but you have to add all the data in columns, rather than in rows. Once all the cells have been added to a column @ columnIndex you then call

    mySheet.AutoSizeColumn(columnIndex)
    

    and move to the next column. I have found no other way to make this functionality work.

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