So did you read the text file and then converted it to datatable using generate datatable?
And then looping through the datatable to get the each row values?
Then for eqch row you need to use currentrow(0).Tostring this will give you the value of the first column and each row will be printed if you give this inside for each row in datatable and a log message
And i hope remaining this are clear to you
Cheers