How to programmatically guess whether a CSV file is comma or semicolon delimited

Question

In most cases, CSV files are text files with records delimited by commas. However, sometimes these files will come semicolon delimited. (Excel will use semicolon delimiter

Answer 1

Depending on what you are working with, if you will guaranteeing have a header row, your approach of trying both, could be the best overall practice. Then once you determine what is going on, if you get to a row further down that doesn't have the required number of columns then you know that the format isn't correct.

Typically i would see this as a user specified option on upload, rather than a programmatic test.