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Hi all,
I am now developing a program which can get data from third party device with using serial port.I am facing 2 problem.
1)I am using serial port which provide by .NET. But in the properties i cant find LinkerPort(the device which i communicate to have linker port). So,how can i add in this properties?
2)In my situation,i need to get 3 group of string buffer and will assign them to different string object(example A,B,C). I am refer to the example at code project (title : Serial communication in .NET 2.0).i need to do these action at the same time(in real time).My question is how can i get the 3 string buffer at the same time(possible?) and how to recognize them whether the first string buffer is belonging to object A and so on..
any hits are welcome,
thanks in advance
cocoonwls
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Hello all,
First time post...so go easy on me 
Here is what my problem is with the BackgroundWorker:
I have a list of files that I would like to go through and manipulate in the background, the problem I am having is how do I recover if one of those files has an error in it?
What I mean by recover is instead of raising an error, I would like to store the error in some list and move on to the next file and then when all the files are done I would like to write to a text box the files that had an error..Would I handle this in BackgroundWorkers RunWorkerCompleted? Because this is where an error goes when it occurs in the DoWork method. Basically after an error how can I get back into my for or while loop that iterates over the remaining files..starting at the next file...
Thanks
Alan
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Use a try-catch-block inside your DoWork method.
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook www.troschuetz.de
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Wow...Holy crap I never thought of that.....I was reading this article http://www.developerdotstar.com/community/node/671/print and it said not to use a try/catch block with the backgroundworker....but I just realized....they meant "Around the backgroundworker" not in the doWork method....Wow....Thank You
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My pleasure 
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook www.troschuetz.de
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I was actually going to say..." I am an idiot for not thinking that " but I read your sig.... and decided not too.  Thanks again
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I don`t t know how to write some information to file descrition , the class FileVesion just can get the inforamtion .
who can help me ?
thanks!
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hi i have a small question.
how is it posible to abort an thread, inside the thread.
so what does i whant
<br />
while(true)<br />
{<br />
Thread thread = new Thread(new ThreadStart(myclass.functioninmyclass));<br />
thread.start();<br />
}<br />
<br />
public void functioninmyclass()<br />
{<br />
<br />
}<br />
<br />
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Hello,
You could use "return;" to end the method, I think the thread will automatically stop after that.
All the best,
Martin
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hi,
You can try this:
<br />
if (thread.IsAlive)<br />
{<br />
thread.Abort();<br />
}
all the best
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When the top-level method of your thread's code comes to an end (by returning or reaching
end of method), the thread exits.
You really should try to let your thread finish up by itself, so use return, and let
all using blocks and finally blocks do the cleanup work.
In general Thread.Abort is not OK since that does not take care of any resources, locks,
etc that your thread possesses.
Luc Pattyn
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HI,
I must implement a millesimale chronometer in C# on my pda… and I have studied the 3 types of timer inside framework .NET (the System.Windows.Forms.Timer, System.Timer (NOT AVAILABLE IN .NET CF) and System.Threading.Timer.
I have begun to test, obtaining strange turns out. The good old API function (GetTickCount) was much simple one to use and in little instructions, associating at the timer with interval of 1 millisecond, worked correctly, but now something does not return and it turns out obtained are not those obtained hopes to you.
Help me please ..
Alex
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Honestly, I didn't get what your problem is and I think understanding your post is hard for everyone else too (no offense intended). Maybe you can rephrase your problem a bit to clear things up. Furthermore, it would be helpful to see the code in question.
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook www.troschuetz.de
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I must develop a millesimale chronometer using the System.Threading.Timer or the System.Windows.Forms.Timer but I do not succeed to show the millesimi elapsed. In VB6 I have used the GetTickCount function, but in “.NET COMPACT FRAMEWORK” it is not supported.
How I can make?
Alex
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Try DateTime.Now.Ticks.
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook www.troschuetz.de
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I Try this ..
-- Example C#:
long lInit, lDiff;
//Start function
lInit = DateTime.Now.Ticks;
//Event timer (interval 1 millisecond)
lDiff = (DateTime.Now.Ticks - lInit) / 1000;
But the result is different from example below:
-- Example VB6:
//Start function
lInit = GetTickCount()
//Event timer (interval 1 millisecond)
lDiff = (GetTickCount() - lInit) / 1000
I must view any millisecond elapsed on interval ...
Alex
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The Ticks property returns the number of 100-Nanosecond-Intervals since a specific date, so you should divide by 10000 I think.
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook www.troschuetz.de
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I have tried but it does not work correctly…
Alex
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AlexB47 wrote: does not work correctly…
What does that mean? How does the calculation results differ?
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook www.troschuetz.de
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every elapsed time (1 millisecond) show this ...
//1 second elapsed
10000
//another second elapsed
20000
//another second elapsed ..
30000
...
Alex
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Where is the big problem? The values look quite good with the exception that obviously the unit doesn't fit. So simply increase the divisor (multiply with 10) in your calculation.
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook www.troschuetz.de
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The answers is System.Environment.TickCount .. 
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You may get diasppointed here: all timing information has some resolution and
some accuracy, and in general accuracy is much worse than resolution may suggest.
Try the following code on your system:
public override void Run() {
long t1=DateTime.Now.Ticks;
int count=0;
int tries=0;
while(count<20) {
tries++;
long t2=DateTime.Now.Ticks;
long diff=t2-t1;
if (diff!=0) {
log("tries="+tries+" t1="+t1+" t2="+t2+" diff="+(t2-t1));
count++;
t1=t2;
}
}
}
You will notice that most of the time diff=0 (suggesting a really fast machine!)
and sometimes diff is something else, typically equal to (or a multiple of)
the real smallest time step you can measure in this way (on my PC it is 156250,
which corresponds to 1/64 second). So dont expect to construct a millisecond chrono
out of it.
What you do need is good old PInvoke to the PerformanceCounter stuff.
Luc Pattyn
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We proceed for small steps… why in .NET 2.0 framework an instruction as under brought back SHOW the millisecond and in framework .NET 2.0 CF (same function, identical code) the millisecond do not SHOW? I have tried also with the Application.DoEvents but nothing ... why?
Es..
private long m_lInitialTick;
private void StartCrono()
{
m_lInitialTick = DateTime.Now.Ticks;
timerTmp.Interval = 1;
timerTmp.Enabled = true;
}
private void StopCrono()
{
timerTmp.Enabled = false;
}
private void timerTmp_Tick(object sender, EventArgs e)
{
label.Text = Convert.ToString((DateTime.Now.Ticks - m_lInitialTick) / 10000) ;
}
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You should read my previous post again,
then try my code snippet on your system.
It would be completely wrong to expect DateTime.Ticks to increment by 1,
on my system it increments by 156250, and maybe on a portable system
it increments by 10000000 (maybe there is only one clock tick per second "to preserve power").
There is nothing in the MSDN help that specifies one or the other; this is unfortunate.
If you have any kind of performance counter available (maybe the one in .NET 2.0,
otherwise the native Win32 one), then that one will give you the best results.
I do not know whether .NET Compact is capable of handling sub-second intervals, I hope it does.
Luc Pattyn
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