I don't want it to be MultiThreaded. i read some tutorials and have a good idea. but unfortuantely all the tutorials on the web write code without explaining. so is anyone here has a good knowledge with Chat application ? I know it's about sockets and stuff but i just need an explaination with code ;)
View 5 Replies
I am using Visual Basic 2008 Express Edition and I want to create a multithreaded application.
View 13 RepliesAfter trying to make an application multithreaded, almost towards the end of the processing of 10,000 records, I get a webexception - operation timeout.Now it seems to process around 8000 records just fine, for each record it is also doing some business logic and with it, performing a call to a webservice.
without threading, its fine - no problems. with threading, we hit the issue.so there are 10,000 records to go through. this is of course slow when done in sync mode (Single threading) but much faster when placing items in the threadpool and waiting until completion.
im not sure exactly why the problem happens. how should I debug this when multithreading? its just odd that for around 3/4 of records, the calls are doing very well, then on the last bit to go, it bombs out.
again - no issues when single threading.update: seems to be after around 1000 records that have been processed that it seems to happen.the application calls out to an internal webservice which then does the direct callout to the "outside world" webservice. The internal webservice does some caching but shouldnt have any effect really.
The outside service it is calling is httpBinding. ReceiveTimeout is set to 00:10:00 (10 minutes) and bypassProxyOnLocal="false"im still not quite understanding why it would timeout after 1000 records because it seems to process the others just fine and does come back (or so it seems) when its making a call to the service
I started throwing exceptions on a multithreaded application, and got a mess.There is a good tutorial on managing exceptions in multithreaded applications?
View 4 RepliesI have developed a multithread Windows Application that requires to print various Docss/rpt's off. The problem is I get a "Load Report Failed" error message when creating a new instance of my embedded crystal report.
View 3 RepliesI've finally gotten multi-threading working on my application, but now I'm having trouble showing forms when I need to. I currently have three threads in my program: one for updating a textbox, one for transferring files, and one for displaying forms. Here's a snippet of code from my program:
[code]...
I'm getting the error: Control 'frmXCopy' accessed from a thread other than the thread it was created on. I know what this means, but I can't find a way to make the ShowForm Sub run off of the main application thread.
I'm trying to make online chat..I saw 2 P2P tutorials:url...both are great tutorials, but they work in LAN only with addresses and ports given.if anybody knows which port and address could I use with this ideas and go to internet.
View 2 RepliesI am trying to develop a chat application using Visual Basic 2008. I have referred some articles on the internet like [URL]...rogramming.htm and got the concept of connecting and sending data. But when it comes to real world chat applications, there is user authentication and all that. So I was wondering if it is possible to make my own Windows Live Messenger or Yahoo Messenger!!. I searched web for such a sample or source code, but could not find any. Has anyone here created such an application??
View 2 RepliesI own an online forum:A host server with MySQL database support, domain name, and, MyBB forum software.I want to create an application that will let my users log in, and, well, chat.But I am clueless. What do I need? I have my own database online and host and everything so... What is a good start?
View 1 RepliesWhat I need to do is create the server side for a chat application that will run on the iPhone, Android, Blackberry and web browsers. To do this I am thinking of:
[Code]...
I made one client-server chat application using vb.net. I want to know how can i change the form/icon color when a client sends a message and vice versa.
for eg: like in yahoo messenger or msn messenger,etc, How i user knows when he receives an message.
I would like to create a voice chat application using Vb.net
View 2 RepliesI have chose to create a text/voice/draw chat application. So far, I have gotten as far as creating a server application and a client application which can be run multiple times on the same mahine allowing each instance to communicate with on another.[code]...
View 5 Repliesdevelop voice chat application using socket programming in vb.net?
View 1 RepliesI have been trying for years making a network app.I need linked to a video or something, mainly on msdn or some microsoft site, because youtube created videos for coding aren't all that helpful as most of the microsoft made videos.
I need not linked to things like multi-user tcp chat application, as i have looked at these, and even found no code solution, but the no code doesn't allow too much customization and hard to deal with data received to make your own commands send and receive and have events for them.
The multi-user tcp chat application, it doesn't explain anything, just gives you the code for you to look at, and well, it's hard to understand.
I WANT TO MAKE THE PROGRAM BEFORE MORE YEARS PASS BY.
How do code to prevent spam in my chat application? I mean the sender shouldn't overload my receiver by continuously sending messages....
Should I start a timer after a message is sent or something like that?
how to start a voice chat application in VB.net
View 1 Repliesi want to create a simple chat and server application but i dont know where to start in socket hope someone will help me to create the application.
i found some tutorial in .net but it doesn't explain the code.
I'm trying to make a chat application in Vb what uses MySQL database.
Here is the code for the UpdateChat()sub
Public Sub UpdateChat()
' MySQL Adapter
Dim MySQLAdapter As New MySqlDataAdapter
[Code]....
Now it gives me there error that a connection is allready open with the Datareader (I havea timer running this sub once in a while).
I have been trying to make a chat application that can go out the local network for quite some time, but all I seem to find is chat applications for in local networks?
View 7 RepliesI want to develop a chat application with a server/client model, opening TCP or UDP sockets in VISUAL BASIC 2008. Is there a working example I can download, or some code to help me with this project? [code]Now, instead of 127.0.0.1 I should put some variable or something that keeps the IP address of the target machine?
View 1 RepliesI cannot find a Working Chat Application. I am starting this thread to get Help. Not for people to say search the forum. I am a novice to Visual Basic and I really need help. I am creating a Multi user chat application that will look like this; provide a Code or a link to a WORKING Chat with a Server end and a Chat end that shows who's online?
View 8 RepliesSo, in another related post, i got the chat to send to a java server, cool.Now, it's a matter of sending it back to VB.on the server side of things, (in java), I am using the following
JAVA
public static void sendback(String what2send) throws IOException {
ObjectOutputStream oos = new ObjectOutputStream(mySocket.getOutputStream());
[code]....
I have a client/server chat application which I made . My question is how do I make the application work not only Locally but On any other network. I tried putting my IP in the part of creation of the client socket .
View 2 RepliesUDP multicast client and server chat application.
View 10 RepliesI am currently developing a chat application and am trying to include:
Various states, like MSN does, available, busy and away.If the user doesn't touch the keyboard for one minute, the state of the user isto be changed into Away.Or something similar to these.I also need the program to be able to play a sound while running.
Someone gave me a link to a Multi-User TCP Chat application once, but, there is a flaw in it, where it wont do special characters, such as Alt+1 will become a different character to the server than the one that was sent. Even I tried to see if the output was usable but it sees it as multiple chars, when it is only 1, and I can't find a link between what it sends and what the character is, so I can't just tell it based on whats sent what the char is, because I see no relation, I would have to type it out for each and every special character.
View 2 Repliesim trying to make a little application that will read an fps server chat log.the chat logs are plain text files that come in the format :
Billy says: yada yada yada
Bob says: mooo
on certain key phrases (which will be user defined) it will reply (also user defined) now my problems. (there are many). most of which stem from not actually knowing any syntax for this language.firstly im suffering something of a huge brain fart with trying to read only the last line. i have it currently reading though the whole file and counting line numbers but then i just hit a wall . what do i do with the line number? i cant find a simple way to stop and come then have it check again after a couple of seconds for a new line? allegedly filestream can seek the end of the file however all my attempts to do anything with filestream have met with absolutle failure.
this is what i currently have for this, and it works to some degree
FileReader = New IO.StreamReader(OpenFileDialog1.FileName)
Do While FileReader.Peek <> -1
txtln = FileReader.ReadLine()
[code]....
i have the remnants of both the options ive considered in there, and its almost doing what i need it to . i just have no idea what to put into the last section to make it wait for another line to be added to the text file, or use the linenumber to make it check back from there for more lines. i cant seem to find a wait/sleep/pause so i just dont know.
my other problem is one of file access. i am aware of some properties of filestream that allow for a shared read/write access for other programs . however as i stated before . i have had no success even getting this simple peice of code to work with filestream.
I've been trying that example application at [url]...
I'm just using the client part to connect to an exiting server application. It works OK up to the point where it appends text into the[code]...
I developed a chat application with an attendant chat server. Everything is working fine. The issue now is the fact that whenever the chat server goes down (for instance, the server system shuts down as a result of power failure or some other problem), by the time the server system come back on, the chat server would have to be restarted manually.
I believe (and I know) it is more appropriate for the chat server application to restart itself when the computer comes back on (and of course regardless of who is logged in and of course, even before anyone logs in). I have a batch file that executes the chat server. My attempt was to create a windows service that start automatically and runs this batch file using a Network Service account on the server system. Although, I'm having a hard time with this (temporarily), I would love to ask if there are any alternatives to using a windows service.
