Ignoring last lines in CSV using Filehelpers if they aren't input

问题

I built a program using FileHelpers to parse CSV files and it works wonders, except I'm running into an issue. Some of the files - but not all - have a number of extra lines in the end with information that does not pertain to actual fields.

like so

...
31,4104019, ,,1043,,,0,,Ventas Total Credito,1,1,277.98,0,0,0,0,21.5040000000,V,
31, ,11212302,,1043,,,0,,Ventas Total Credito,1,1,33.28,0,0,0,0,21.5040000000,V,
31, ,11212307,,1043,,,0,,Ventas Total Credito,1,1,277.98,0,0,0,0,21.5040000000,V,

;Importado="01/11/2013"
 //blank line here too

I know FileHelpers has the

[IgnoreLast(3)] 
public class whatever...

option, but as only some of the files have those extra 3 lines, Using this for all could result in the last 3 records being ignored for some files.

Is there any way to tell it when to ignore a line? Or should I read the file separately first and remove those lines myself?

回答1:

You can use the BeforeReadRecord event or implement in the record INotifyRead interface that is more simple.

In both cases use e.SkipThisRecord = true; in the cases that you need to discard

来源：https://stackoverflow.com/questions/19933439/ignoring-last-lines-in-csv-using-filehelpers-if-they-arent-input