How can I know the bytes current being copied during copying large file in .net?

Question

I used to File.Copy method for copying file.

The problem is I can't know the current state during copying file.

Is there anyway that I can check how much the file is being copied? or get a return value?

If not, do I have to make my own method with Filestream or something?

Sorry about my poor English & thanks in advance.

related: http://stackoverflow.com/questions/187768/can-i-show-file-copy-progress-using-fileinfo-copyto-in-net — Norbert Willhelm, Oct 12 '11 at 12:00

score 4 · Accepted Answer · answered Oct 12 '11 at 11:59

4

I would leave copying to the OS rather than rolling out your own, you can use the CopyFileEx API which implements a progress callback (pinvoke).

answered Oct 12 '11 at 11:59

Alex K.

score 0 · Answer 2 · answered Oct 12 '11 at 16:38

The problem is I can't know the current state during copying file.

Is there anyway that I can check how much the file is being copied? or get a return value?

Check the size on the file being created in the new location using a similar method as above.

If not, do I have to make my own method with Filestream or something?

You really should avoid doing something that operating system does.

2 Answers2