Using a CDF program running in CDF Player, is it possible to use a system dialog box, or even just an Import statement such as Import["*.CSV"], to import data from a text or comma separated file on a personal computer? I have browsed the forums and Wolfram documentation and it appears that it is not possible, but all the questions were a little bit different in one way or another. My own attempts have failed to produce a dialog box.
Functionality you are looking for is included in Wolfram Player Pro. Detailed functionality difference relative to Free Wolfram CDF Player and Mathematica is listed here:
If including your data in CDF is possible in your case then
1) This blog (2nd example) shows simplest case of compression and inclusion of user data in CDF
2) This video shows advanced cases (notebook download link is above the video)