Windows FileSystemWatcher question 1

[sallyan]

***program:*****************************
try to use a c# FileSystemWatcher to trigger process on events such as filecreation, filerenamed, etc
***problem:******************************
the program works fine with manual (mouse) creation of file, but I wrote a file generator to automaticly generate files, code as :
File.Create("c:/myfile1.txt");
File.Create("c:/Myfile2.txt);
...
the FileSystemWatcher wouldn't detect this kind of file creation. sometimes it says "process is being in use" sth like that.
***question***************************:
does anyone have any idea about how the windows file system works?
Thanks!

 

[mattKnight]

Whilst I am not familar wiht c#....

I am having a similar issue with ReadDirectoryChangesW. AFAIK, the function can return whilst the writing process still has the the file locked i.e. before the file is completely written.

I have not yet had time to alter my code to wait until I can get an exclusive lock on the file.

I am looking at using the LockFile (or LockFileEx) api to ensure that I have exclusive access.


Take Care

Matt
If at first you don't succeed, skydiving is not for you.

 

[sallyan]

thanks Matt, hope you work that out soon.

 

[769262]

check this i think it solves your problems

http://www.netplague.dap.ro

 

[mattKnight]

getting a lock on the file worked for me...

Sorry I was a bit unclear. I am using LockFile as a test, if the call succeeds, then I have a lock, so the file write must be complete and vice versa. If you do go this way, and get a successful lock - don't forget to unlock it afterwards!

Take Care

Matt
If at first you don't succeed, skydiving is not for you.

 

[sallyan]

if I have a lock so the owner cannot write to it, then I cannot do it, but if I have a read lock and the owner still can write it, It would be what I need. can I do that?