Hello, friends,

I am programming a Windows Service using .net 2005. In this service, I need 
a timer to check file status in a predefined interval. However, as you may 
have experienced by yourself or read through internet, the 
System.Timers.Timer() is not reliable: The timer event may not be fired at 
all sometimes.

Any good/reliable solutions/approaches for this? Thanks a lot.

Andrew wrote:

> I am programming a Windows Service using .net 2005. In this service, I need 
> a timer to check file status in a predefined interval. However, as you may 
> have experienced by yourself or read through internet, the 
> System.Timers.Timer() is not reliable: The timer event may not be fired at 
> all sometimes.
> 
> Any good/reliable solutions/approaches for this? Thanks a lot.


The only problem I've read about with respect to any timer problems in 
..NET is a timer that has been configured to repeat, and which has been 
left running for an extended period of time (I don't recall the 
specifics, but "49 days" seems to pop into my head for some reason).

If your application is one that might be affected by this, my 
understanding is that simply changing the timer usage so that you reset 
the timer each time it is signaled, and start it again with a new 
interval, it works fine.

If you expect there to be a problem, my suggestion is that you first 
reproduce the problem in your own code.  Then you will have a better 
idea of whether it's really a problem, and you will be able to ensure 
that you have satisfactorily worked around the problem.

Pete

You should "code up" a timer.

http://groups.google.com/group/microsoft.public.dotnet.framework/browse_thread/thread/aa8a7a59b698f6b5/009395e3234a3dbc?lnk=st&q=sloan+%22Private+m_doTheWorkTimer+As+Timer%22&rnum=3#009395e3234a3dbc

I think I have a link at the bottom of that post, which refs a MS KB article 
about the "why".


or

http://groups.google.com/groups/search?q=sloan+%22Private+m_doTheWorkTimer+As+Timer%22


or

http://msdn2.microsoft.com/en-us/library/system.threading.timercallback.aspx


"Andrew"  wrote in message 
news:E1DD11C3-9D5F-41C9-9472-07A5CA6C9BD9@microsoft.com...

> Hello, friends,
>
> I am programming a Windows Service using .net 2005. In this service, I 
> need
> a timer to check file status in a predefined interval. However, as you may
> have experienced by yourself or read through internet, the
> System.Timers.Timer() is not reliable: The timer event may not be fired at
> all sometimes.
>
> Any good/reliable solutions/approaches for this? Thanks a lot. 

sloan wrote:

> You should "code up" a timer.
> 
> http://groups.google.com/group/microsoft.public.dotnet.framework/browse_thread/thread/aa8a7a59b698f6b5/009395e3234a3dbc?lnk=st&q=sloan+%22Private+m_doTheWorkTimer+As+Timer%22&rnum=3#009395e3234a3dbc
> 
> I think I have a link at the bottom of that post, which refs a MS KB article 
> about the "why".


Isn't it just a problem in .NET 1.0 and 1.1 but not in 2.0 and later?

The KB article that is pointed to in the thread you posted says those 
are the versions the bug applies to, but I wonder if it was written 
before .NET 2.0 was out?

http://support.microsoft.com/kb/842793

-- 
-glenn-