It shouldn’t be too hard to derive entire CSV reader from the code presented in this article, but tabular data can come in many different formats and implementing a reader and a writer for each of them may not be so easy and could really hurt your productivity.

For that reason, could use some third party component which supports various file formats. This will probably cost you some money, but formats like XLS, XLSX, CSV, ODS, HTML are likely to be supported within the same API, so your application will be able to target different file formats using the same code.