I write a apex class to import csv file from the VF page. The 'BLOB is not a valid UTF-8 string' raising.I don't how to set the csv encode. or is there any way to convert the file to UTF-8 by apex code.

Any suggestion would be appriciate.

Thanks.

I'm having some difficulty finding the API capability that allows me to associate uploaded Content (inserted into ContentVersion) with any Custom Object without using the front end.  What object(s) store the relationship from any object to associated 'RelatedContent'?