473,785 Members | 2,167 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

multi threading

hi all, i have a software written in vb.net which has many thread in it.

The software basically use about 8 threads to monitor in coming data
from serial port,

and some other thread that process those data.

What happen is the software will suddenly "dissapear" after running for
some time.

theres no error message or anything, it just end by itself.....

I wondering anyone got this kind of experience before ?

any clue someone ?

I am loosing my hair.... sigh..
Nov 20 '05
15 3050
Hi,

On Error Resume Next STILL works. Check it out. As always, it skips all
errors in scope. This is equivalent to a Try/Catch/End Try block that has
no code to trap an exception in the Catch section.

The problem is that either of these may skip an valuable exception. And, of
course, you can write Catch code that doesn't trap the exception of
interest, thus causing a logical failure that remains unexplained.

--
Richard Grier (Microsoft Visual Basic MVP)

See www.hardandsoftware.net for contact information.

Author of Visual Basic Programmer's Guide to Serial Communications, 3rd
Edition ISBN 1-890422-27-4 (391 pages) published February 2002.
Nov 20 '05 #11
Hi,

The UI is STAThread (Single Apartment Threaded). The Microsoft references
for Threading describe what you need to do to write from a free thread to an
STAThread code module. The example code that they show involves updating a
ListView control, I think. However, the requirements are the same
regardless, when your threaded code calls code in an STAThread (UI).

--
Richard Grier (Microsoft Visual Basic MVP)

See www.hardandsoftware.net for contact information.

Author of Visual Basic Programmer's Guide to Serial Communications, 3rd
Edition ISBN 1-890422-27-4 (391 pages) published February 2002.
Nov 20 '05 #12
Hi,

On Error Resume Next STILL works. Check it out. As always, it skips all
errors in scope. This is equivalent to a Try/Catch/End Try block that has
no code to trap an exception in the Catch section.

The problem is that either of these may skip an valuable exception. And, of
course, you can write Catch code that doesn't trap the exception of
interest, thus causing a logical failure that remains unexplained.

--
Richard Grier (Microsoft Visual Basic MVP)

See www.hardandsoftware.net for contact information.

Author of Visual Basic Programmer's Guide to Serial Communications, 3rd
Edition ISBN 1-890422-27-4 (391 pages) published February 2002.
Nov 20 '05 #13
Hi,

The UI is STAThread (Single Apartment Threaded). The Microsoft references
for Threading describe what you need to do to write from a free thread to an
STAThread code module. The example code that they show involves updating a
ListView control, I think. However, the requirements are the same
regardless, when your threaded code calls code in an STAThread (UI).

--
Richard Grier (Microsoft Visual Basic MVP)

See www.hardandsoftware.net for contact information.

Author of Visual Basic Programmer's Guide to Serial Communications, 3rd
Edition ISBN 1-890422-27-4 (391 pages) published February 2002.
Nov 20 '05 #14
thanks guys, i guess i have to dig deepper to find what's going on....
"Dick Grier" <di************ **@msn.com> wrote in message
news:%2******** ********@TK2MSF TNGP11.phx.gbl. ..
Hi,

The UI is STAThread (Single Apartment Threaded). The Microsoft references
for Threading describe what you need to do to write from a free thread to an STAThread code module. The example code that they show involves updating a ListView control, I think. However, the requirements are the same
regardless, when your threaded code calls code in an STAThread (UI).

--
Richard Grier (Microsoft Visual Basic MVP)

See www.hardandsoftware.net for contact information.

Author of Visual Basic Programmer's Guide to Serial Communications, 3rd
Edition ISBN 1-890422-27-4 (391 pages) published February 2002.

Nov 20 '05 #15
HI, I found out that is the RS232 Class that have causing me problem. It
happen when i use it with

..Workingmode = overlapped

"aikwee" <ai****@spammer .com> wrote in message
news:uX******** ******@TK2MSFTN GP10.phx.gbl...
thanks guys, i guess i have to dig deepper to find what's going on....
"Dick Grier" <di************ **@msn.com> wrote in message
news:%2******** ********@TK2MSF TNGP11.phx.gbl. ..
Hi,

The UI is STAThread (Single Apartment Threaded). The Microsoft references for Threading describe what you need to do to write from a free thread
to an
STAThread code module. The example code that they show involves
updating a
ListView control, I think. However, the requirements are the same
regardless, when your threaded code calls code in an STAThread (UI).

--
Richard Grier (Microsoft Visual Basic MVP)

See www.hardandsoftware.net for contact information.

Author of Visual Basic Programmer's Guide to Serial Communications, 3rd
Edition ISBN 1-890422-27-4 (391 pages) published February 2002.



Nov 20 '05 #16

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

37
4899
by: ajikoe | last post by:
Hello, Is anyone has experiance in running python code to run multi thread parallel in multi processor. Is it possible ? Can python manage which cpu shoud do every thread? Sincerely Yours, Pujo
77
5390
by: Jon Skeet [C# MVP] | last post by:
Please excuse the cross-post - I'm pretty sure I've had interest in the article on all the groups this is posted to. I've finally managed to finish my article on multi-threading - at least for the moment. I'd be *very* grateful if people with any interest in multi-threading would read it (even just bits of it - it's somewhat long to go through the whole thing!) to check for accuracy, effectiveness of examples, etc. Feel free to mail...
0
1814
by: Stuart Norris | last post by:
Dear Group, I am attempting to write a "splash" and "status" Form using a second thread. I wish to use this Form to display status information to the user when I do CPU intensive work in my GUI during startup. I wish to also use the same Form after startup as well if I do something CPU intensive. I have developed a multi-threaded application however the very first
13
348
by: notregister | last post by:
my program have as many as 8 threads running at a same time. can different threads open a same file at the same time? let say thread1 open a file abc.txt at the same time with thread 2, both doing at different operation...
2
4891
by: NiponW | last post by:
Hi, I have SQL SERVER 2000 SP4 Enterprise , Windows 2003 Enterprise on Xeon 4 Processors (now with multi-threading CPU) and I have questions which seem weirds to me (used to have the same config without Multi-Threading) as following: 1. SQL Server see 8 CPUs. Is this because of multi-threading CPUs ? 2. when use SP_WHO2 ACTIVE ,
20
5968
by: dotyet | last post by:
Hi Everyone, It would be a real big help if anyone can shed light on whether DB2 UDB 8.2 on Solaris will make optimum use of a Sun T2000 server. The server has 1 CPU with 8 cores and each core has 4 threads (32 virtual CPUs). We are exploring this option againts an equivalent performance pSeries box. But before we delve deeper, we want some basic info on that. Any suggestions would be helpful.
0
1879
ammoos
by: ammoos | last post by:
hi friends pls help me.. i got an assignment which i feel very difficult to me.. i dont have more knowledge about multi-threading in .net... the assignment details is below.... pls help me... i have to submit this assignment today evening... please....... Windows Application to demonstrate the use of Multi-Threading with Synchronous & Asynchronous Threading. Requirements 1) A form with a) a button to initialize threads ...
14
3459
by: Akihiro KAYAMA | last post by:
Hi all. I found cooperative multi-threading(only one thread runs at once, explicit thread switching) is useful for writing some simulators. With it, I'm able to be free from annoying mutual exclusion, and make results deterministic. For this purpose, and inspired by Ruby(1.9) fiber, I wrote my own version of fiber in Python.
5
3524
by: George Maicovschi | last post by:
As multi-threading is not built in PHP I've been using a hack letting the Apache server handle the multi-threading issues, but I'm really curious of other approaches to this issue. If anyone has any ideas I'd be more than glad to hear them up and discuss them.
1
1711
by: =?Utf-8?B?QU1lcmNlcg==?= | last post by:
Sorry this is so long winded, but here goes. Following the model of http://msdn2.microsoft.com/en-us/library/system.runtime.remoting.channels.ipc.ipcchannel.aspx I made a remote object using the IpcChannel Class (vs 2005, vb, fw 2.0). Everyting works fine. The object is registered with WellKnownObjectMode.Singleton The remote object appears at the bottom of this posting. The code is deliberately obtuse to expose an issue about when...
0
9647
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
9489
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
1
10100
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
8988
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
1
7509
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
6744
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
5528
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
4061
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
3
2893
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.