how to leave a loop after 2 sec.

[Rainer]

Hello,

i want to leave a loop after 2 sec, befor it will a endless loop

the loop will delay the programm, till a port buffer is filled
with 22 bytes from device.
but not in every case the device is send 22 byte, from time to
time it send 15 or 13 bytes.


a snipped


while (port.BytesToRe ad < 22)
{
// do something

// if after 2 sec nomber of bytes < 22 --- break
ore
// break after 2 seconds
}


how can i make this break , may be with a timer ?

many thanks for competent help.


Rainer

[=?Utf-8?B?S0g=?=]

RE: how to leave a loop after 2 sec.


DateTime quitTime = DateTime.Now.Ad dSeconds(2.0);

while (port.BytesToRe ad < 22 && DateTime.Now < quitTime)
{
...
}



"Rainer" wrote:

Hello,
>
i want to leave a loop after 2 sec, befor it will a endless loop
>
the loop will delay the programm, till a port buffer is filled
with 22 bytes from device.
but not in every case the device is send 22 byte, from time to
time it send 15 or 13 bytes.
>
>
a snipped
>
>
while (port.BytesToRe ad < 22)
{
// do something
>
// if after 2 sec nomber of bytes < 22 --- break
ore
// break after 2 seconds
}
>
>
how can i make this break , may be with a timer ?
>
many thanks for competent help.
>
>
Rainer
>
>
>

[Rainer]

Re: how to leave a loop after 2 sec.


"Peter Duniho" <NpOeStPeAdM@nn owslpianmk.coms chrieb im Newsbeitrag
news:op.t6k8lbw l8jd0ej@petes-computer.local. ..
On Fri, 15 Feb 2008 08:55:01 -0800, KH <KH@discussions .microsoft.com>
wrote:

>
DateTime quitTime = DateTime.Now.Ad dSeconds(2.0);
>
while (port.BytesToRe ad < 22 && DateTime.Now < quitTime)
{
...
}

This is not a bad solution at all. However, I'll point out that
DateTime.Now takes a non-trivial amount of time to execute. In this
situation it may not matter -- the contents of the loop may consume far
more time than the retrieval of the DateTime.Now value -- but it's
something to be aware of.



wow, the world can by easy, thank you

Rainer

[verbiest@gmail.com]

Re: how to leave a loop after 2 sec.

DateTime quitTime = DateTime.Now.Ad dSeconds(2.0);

>
while (port.BytesToRe ad < 22 && DateTime.Now < quitTime)

I would prefer using DateTime.UtcNow , that will be faster. Also, if
your code happens to run 1 second before the daylight-savings-time
kicks in the original code will get you into trouble. Using UtcNow
will not.

Kristof Verbiest

http://kristofverbiest.blogspot.com/

[Rainer]

Re: how to leave a loop after 2 sec.

<verbiest@gmail .comschrieb im Newsbeitrag
news:85b8fe26-4f48-49df-8478-b183c2ffff6a@41 g2000hsc.google groups.com...

>DateTime quitTime = DateTime.Now.Ad dSeconds(2.0);
>>
>while (port.BytesToRe ad < 22 && DateTime.Now < quitTime)

>
I would prefer using DateTime.UtcNow , that will be faster. Also, if
your code happens to run 1 second before the daylight-savings-time
kicks in the original code will get you into trouble. Using UtcNow
will not.
>
Kristof Verbiest
http://kristofverbiest.blogspot.com/

Hi Kristof,

thanks, i will check this out tomorrow.

Grotje or Au revoir how do you like it ;-)