timer1.stop

[cj]

This program is used to send files to an ftp server at 2:00am each day.
At the very top of my program I dim a new instance of a com FTP
control. I have a processing sub which calls a login function which runs
the ftp controls login method and verifies it got logged in. The
processing sub then calls a remote directory function. The remote
directory function calls the com controls method to open the directory
for a remote directory listing and gets the listing.

The processing sub can be called from a button click or from the
timer1.tick event. Testing using the button is great. When the timer
kicks it off it logs in fine and then gives "There is no source code
available for the current location" on myftpClient.opendirectory which
is the com controls method to open the directory for a remote directory
listing.

This solves the problem but why? The first line in the processing sub
is Timer1.stop. I do this to keep it from trying to start processing
again while processing is running. The last line in the processing sub
is Timer1.start. If instead of doing this I use a boolean variable as a
flag saying processing is occurring I have no problems. Why would
timer1.stop cause this problem? And why would it allow the login to
work but not the opendirectory?

I expect it's something simple I'm not understanding about timer events.
Please enlighten me.

 

[cj]

I was using VB2003. I upgraded the project to VB2005 and it works as I
first designed it. ????

 

[Walter Wang [MSFT]]

Hi cj,

Based on my understanding, the issue:
1) Only occurs in .NET 1.1
2) Only when you're calling Timer.Stop() in the beginning of Tick event
3) Occurs when calling the COM component's OpenDirectory() method

Please correct me if I've misunderstood anything.

To troubleshoot this issue, I have to ask some questions first:
1) What's the exact exception you're seeing?
2) Do you mean removing "Timer1.Stop" in the Tick event will fix the issue?
3) Is it related to the specific com component you're using? I mean, if we
use some other com component in the Tick event, do you still see the issue?


I'm afraid without reproducible project, it's difficult to troubleshoot and
find the root cause on my side.

In the meanwhile, I'll check the implementation changes in the Timer code
from 1.1 to 2.0 to see if there's any break changes.


Sincerely,
Walter Wang ([email protected], remove 'online.')
Microsoft Online Community Support

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[cj]

I understand it is hard to solve a problem unless your looking at the
code. I also found that the same program opened and compiled in VB2005
does not have the problem. Given I'm on a tight time frame and there is
no reason this can't be done in VB2005 that's what I'm going to do.

I appreciate your help but I don't have time to figure out why it will
not work in 2003. I'll just use 2005.

Thanks