This is a follow-up on my previous thread concerning having the program
wait for a certain date and time and then executing some code when it
gets there. My question is; can I use the Sleep function from kernel32
to accomplish this? My concern is that this function takes milliseconds
where my program needs to be accurate to within 5 minuets, and delays
may be as long as a number of days, months or whatever. Would I run into
many problems doing it this way? I was thinking that if an overflow
occurs then I could just take the maximum value that Sleep would accept
and then once that is done having a function check if the time really
did come or if a further delay is needed. Please let me know what you
think of this or if there is a better way to do this.
One more thing, how would I be able to implement this so that the delay
of execution of tasks is completely separate from the rest of the
program? That is, the user should still be able to access all the forms,
change settings, and do all of that. I almost have a desire to write
something like a service, but don't have a clue of where to even start
on that.
18  3238 
"Max" <ma*****@yahoo. com> schrieb This is a follow-up on my previous thread concerning having the
program wait for a certain date and time and then executing some
code when it gets there. My question is; can I use the Sleep
function from kernel32 to accomplish this? My concern is that this
function takes milliseconds where my program needs to be accurate to
within 5 minuets, and delays may be as long as a number of days,
months or whatever. Would I run into many problems doing it this
way? I was thinking that if an overflow occurs then I could just
take the maximum value that Sleep would accept and then once that is
done having a function check if the time really did come or if a
further delay is needed. Please let me know what you think of this
or if there is a better way to do this.
Why not use a Timer and handle it's Elapsed event?
One more thing, how would I be able to implement this so that the
delay of execution of tasks is completely separate from the rest of
the program? That is, the user should still be able to access all
the forms, change settings, and do all of that. I almost have a
desire to write something like a service, but don't have a clue of
where to even start on that.
If you use the System.Timers.T imer, the Elapsed event occurs in a separate
thread.
--
Armin
How to quote and why: http://www.plig.net/nnq/nquote.html http://www.netmeister.org/news/learn2quote.html
"Max" <ma*****@yahoo. com> schrieb This is a follow-up on my previous thread concerning having the
program wait for a certain date and time and then executing some
code when it gets there. My question is; can I use the Sleep
function from kernel32 to accomplish this? My concern is that this
function takes milliseconds where my program needs to be accurate to
within 5 minuets, and delays may be as long as a number of days,
months or whatever. Would I run into many problems doing it this
way? I was thinking that if an overflow occurs then I could just
take the maximum value that Sleep would accept and then once that is
done having a function check if the time really did come or if a
further delay is needed. Please let me know what you think of this
or if there is a better way to do this.
Why not use a Timer and handle it's Elapsed event?
One more thing, how would I be able to implement this so that the
delay of execution of tasks is completely separate from the rest of
the program? That is, the user should still be able to access all
the forms, change settings, and do all of that. I almost have a
desire to write something like a service, but don't have a clue of
where to even start on that.
If you use the System.Timers.T imer, the Elapsed event occurs in a separate
thread.
--
Armin
How to quote and why: http://www.plig.net/nnq/nquote.html http://www.netmeister.org/news/learn2quote.html
Armin Zingler wrote: "Max" <ma*****@yahoo. com> schrieb
This is a follow-up on my previous thread concerning having the
program wait for a certain date and time and then executing some
code when it gets there. My question is; can I use the Sleep
function from kernel32 to accomplish this? My concern is that this
function takes milliseconds where my program needs to be accurate to
within 5 minuets, and delays may be as long as a number of days,
months or whatever. Would I run into many problems doing it this
way? I was thinking that if an overflow occurs then I could just
take the maximum value that Sleep would accept and then once that is
done having a function check if the time really did come or if a
further delay is needed. Please let me know what you think of this
or if there is a better way to do this.
Why not use a Timer and handle it's Elapsed event?
One more thing, how would I be able to implement this so that the
delay of execution of tasks is completely separate from the rest of
the program? That is, the user should still be able to access all
the forms, change settings, and do all of that. I almost have a
desire to write something like a service, but don't have a clue of
where to even start on that.
If you use the System.Timers.T imer, the Elapsed event occurs in a separate
thread.
How much CPU power will it take if I have the timer running for a number
of days? That's really my only concern, if it doesn't take almost any
resources and is accurate enough then I think that solves my problem.
Armin Zingler wrote: "Max" <ma*****@yahoo. com> schrieb
This is a follow-up on my previous thread concerning having the
program wait for a certain date and time and then executing some
code when it gets there. My question is; can I use the Sleep
function from kernel32 to accomplish this? My concern is that this
function takes milliseconds where my program needs to be accurate to
within 5 minuets, and delays may be as long as a number of days,
months or whatever. Would I run into many problems doing it this
way? I was thinking that if an overflow occurs then I could just
take the maximum value that Sleep would accept and then once that is
done having a function check if the time really did come or if a
further delay is needed. Please let me know what you think of this
or if there is a better way to do this.
Why not use a Timer and handle it's Elapsed event?
One more thing, how would I be able to implement this so that the
delay of execution of tasks is completely separate from the rest of
the program? That is, the user should still be able to access all
the forms, change settings, and do all of that. I almost have a
desire to write something like a service, but don't have a clue of
where to even start on that.
If you use the System.Timers.T imer, the Elapsed event occurs in a separate
thread.
How much CPU power will it take if I have the timer running for a number
of days? That's really my only concern, if it doesn't take almost any
resources and is accurate enough then I think that solves my problem.
"Max" <ma*****@yahoo. com> schrieb
Why not use a Timer and handle it's Elapsed event?
One more thing, how would I be able to implement this so that
the delay of execution of tasks is completely separate from the
rest of
the program? That is, the user should still be able to access
all the forms, change settings, and do all of that. I almost have
a
desire to write something like a service, but don't have a clue
of where to even start on that.
If you use the System.Timers.T imer, the Elapsed event occurs in a
separate thread.
How much CPU power will it take if I have the timer running for a
number of days?
~ 0%, unless you want it to fire each millisecond, but as you said, much
less is sufficient.
That's really my only concern, if it doesn't take
almost any resources and is accurate enough then I think that solves
my problem.
CPU usage mainly depends on what you're doing when the timer event fires.
--
Armin
How to quote and why: http://www.plig.net/nnq/nquote.html http://www.netmeister.org/news/learn2quote.html
"Max" <ma*****@yahoo. com> schrieb
Why not use a Timer and handle it's Elapsed event?
One more thing, how would I be able to implement this so that
the delay of execution of tasks is completely separate from the
rest of
the program? That is, the user should still be able to access
all the forms, change settings, and do all of that. I almost have
a
desire to write something like a service, but don't have a clue
of where to even start on that.
If you use the System.Timers.T imer, the Elapsed event occurs in a
separate thread.
How much CPU power will it take if I have the timer running for a
number of days?
~ 0%, unless you want it to fire each millisecond, but as you said, much
less is sufficient.
That's really my only concern, if it doesn't take
almost any resources and is accurate enough then I think that solves
my problem.
CPU usage mainly depends on what you're doing when the timer event fires.
--
Armin
How to quote and why: http://www.plig.net/nnq/nquote.html http://www.netmeister.org/news/learn2quote.html
Armin Zingler wrote: "Max" <ma*****@yahoo. com> schrieb
Why not use a Timer and handle it's Elapsed event?
One more thing, how would I be able to implement this so that
the delay of execution of tasks is completely separate from the
rest of
the program? That is, the user should still be able to access
all the forms, change settings, and do all of that. I almost have
a
desire to write something like a service, but don't have a clue
of where to even start on that.
If you use the System.Timers.T imer, the Elapsed event occurs in a
separate thread.
How much CPU power will it take if I have the timer running for a
number of days?
~ 0%, unless you want it to fire each millisecond, but as you said, much
less is sufficient.
That's really my only concern, if it doesn't take
almost any resources and is accurate enough then I think that solves
my problem.
CPU usage mainly depends on what you're doing when the timer event fires.
Ok I'm getting a hang of this and it seems to be working fine. Now
here's another question, in my program the minimum time between events
is 5 minuets. What do you think is better, to have the timer fire every
5 minuets and check if an event needs to be executed, or instead,
counting the number of years, months, days, hours, and minuets until the
next event, converting it into milliseconds, and setting that as the
interval? How accurate is this thing anyway? Would it even be able to
keep time for days and months or would I just be better of firing the
event every 5 minuets, synchronizing it with the system time, and then
starting it back up again?
Armin Zingler wrote: "Max" <ma*****@yahoo. com> schrieb
Why not use a Timer and handle it's Elapsed event?
One more thing, how would I be able to implement this so that
the delay of execution of tasks is completely separate from the
rest of
the program? That is, the user should still be able to access
all the forms, change settings, and do all of that. I almost have
a
desire to write something like a service, but don't have a clue
of where to even start on that.
If you use the System.Timers.T imer, the Elapsed event occurs in a
separate thread.
How much CPU power will it take if I have the timer running for a
number of days?
~ 0%, unless you want it to fire each millisecond, but as you said, much
less is sufficient.
That's really my only concern, if it doesn't take
almost any resources and is accurate enough then I think that solves
my problem.
CPU usage mainly depends on what you're doing when the timer event fires.
Ok I'm getting a hang of this and it seems to be working fine. Now
here's another question, in my program the minimum time between events
is 5 minuets. What do you think is better, to have the timer fire every
5 minuets and check if an event needs to be executed, or instead,
counting the number of years, months, days, hours, and minuets until the
next event, converting it into milliseconds, and setting that as the
interval? How accurate is this thing anyway? Would it even be able to
keep time for days and months or would I just be better of firing the
event every 5 minuets, synchronizing it with the system time, and then
starting it back up again?
Max,
In addition to the System.Timers.T imer you may want to consider using the
System.Threadin g.Timer class also
The Threading.Timer allows you to set a TimeSpan on when the first event
should occur. So if you need the event in 5 minutes you pass a TimeSpan of 5
minutes, if you need the first event in 3 days, you pass a TimeSpan of 3
days. If you need the first event in 1 day, 2 hour, 3 minutes and 44
seconds, then you pass a TimeSpan of 1 day, 2 hours, 3 minutes, and 44
seconds...
The Timers.Timer you would need to convert the above TimeSpan into a double
that represents the milliseconds (TimeSpan.Total Milliseconds is good for
this).
Of course the Timers.Timer have an AutoReset feature if you need only a
single Elapsed event. The Threading.Timer has a similar ability...
Either way the following recent articles in MSDN Magazine explain the
difference between the three timer objects in .NET & when to use each. http://msdn.microsoft.com/msdnmag/is...T/default.aspx http://msdn.microsoft.com/msdnmag/is...3/default.aspx
Another thought is rather then rely on a Timer you may want to consider the
Task Scheduler under the Windows Control Panel.
Hope this helps
Jay
"Max" <ma*****@yahoo. com> wrote in message
news:kd******** ************@co mcast.com... This is a follow-up on my previous thread concerning having the program
wait for a certain date and time and then executing some code when it
gets there. My question is; can I use the Sleep function from kernel32
to accomplish this? My concern is that this function takes milliseconds
where my program needs to be accurate to within 5 minuets, and delays
may be as long as a number of days, months or whatever. Would I run into
many problems doing it this way? I was thinking that if an overflow
occurs then I could just take the maximum value that Sleep would accept
and then once that is done having a function check if the time really
did come or if a further delay is needed. Please let me know what you
think of this or if there is a better way to do this.
One more thing, how would I be able to implement this so that the delay
of execution of tasks is completely separate from the rest of the
program? That is, the user should still be able to access all the forms,
change settings, and do all of that. I almost have a desire to write
something like a service, but don't have a clue of where to even start
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