Here are a couple links for quick reference: ExcelLibrary - GNU Lesser GPL EPPlus - GNU (LGPL) - No longer maintained EPPlus 5 - Polyform Noncommercial - Starting May 2020 NPOI - Apache License It seems to be more actively updated and documented as well.Īlso, as noted by below, EPPlus has support for Pivot Tables and ExcelLibrary may have some support ( Pivot table issue in ExcelLibrary) In all, EPPlus seems to be the best choice as time goes on. There are a few known bugs with each library as noted in the comments. You can also use EPPlus, which works only for Excel 2007/2010 format files (.xlsx files). Plus it has a DataSetHelper that lets you use DataSets and DataTables to easily work with Excel data.ĮxcelLibrary seems to still only work for the older Excel format (.xls files), but may be adding support in the future for newer 2007/2010 formats. xlsx format yet, but they are working on adding that functionality in. This looks to be a port of the PHP ExcelWriter that you mentioned above. It's a free, open source library posted on Google Code: You can use a library called ExcelLibrary.
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