I'm developing chat program. I have database on my webhosting where I store rooms and memebrship tables... I created the client, but I still cant do the server side of the program. It must be in win forms app.(I use .Net 3.5)Every tutorialSample of server side is for Console app. Client code is very close to this(if somebody need it): LINK
View 1 RepliesMulti-User Chat Program (Server & Client) with Main Server?
View 1 RepliesWe have a small service shows continuous nonpaged pool bytes increase from the moment it is started. This is only on a 2008 server (all the others work fine).
The service basically connects a socket to a client to see if it's successful and then closes (most code omitted):
[Code]...
i made a program that uses sockets to connect the server to client but there is a problem with it when i try it on this ip"127.0.0.1"wich is not a real ip just a loopback to my computer it works just fine when i use my local ip it works as well when i use my main ip from http:whatsmyip.org it doesnt work at all i dont know why it doesnt say an error or an exception but its not connecting so i gave the server to a friend of mine i tried using both his real ip and his local but still not working i dont know why?i mean i am 100% sure of my code...
View 7 RepliesI am trying to write a program that has a server/listener program and then 2 client programs, the 2 client programs are supposed to be able to chat with each other. Can anyone point me in the right direction on this?
View 4 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 RepliesHow would I use this for a chat client? I'm not sure where to even start and the internet is helping me find much about it.
View 4 RepliesHow do I make a chat room that multi clients will be connecting to at once. Im trying to add a ping/pong method which is just msgbox that tells the user if the message was received. I know that you need a background worker for this but how do i handle all the msgs that are going back and forth to all the clients that are connected to the server
View 1 RepliesI'm trying to get a VB2008 multi thread application working that connects to a local server program using sockets. Server requests for this particular system can be more quickly handled by a number of connections, so I've written some code to run any number of data request threads that I choose. The problem that I'm having is that the data returned from the server is getting mixed up and is often returned to a different thread/socket than the one that requested it. Other than that, it seems to work okay. If I use just one thread, then the system works as it should. Pls. see incuded code, which is heavily edited to remove all the other fruit salad. Is there any way to set up the sockets so that data returned to the socket/thread that requested it?
Module StaticDeclarations
Public WithEvents g_SD As New SocketDataClass(New MainThread.MTCallback(AddressOf MainThread.MTResultCallbackSub))
Public WithEvents g_MT As New MainThread(New SocketDataClass.SDCallback(AddressOf SocketDataClass.SDThreadResultCallbackSub))
[code]....
So, 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 problem with scroll in a treeview in a Windows forms application (Framework version 3.5).
The strange thing about the problem is that on Windows XP, Windows 7 and Windows 2008 the scroll works as excepted, but in Windows Server 2003 SP2 the scrolling doesn't work. Enable/disable Visual Styles doesn't seem to make a difference on Server 2003.
Steps to reproduce the error:
1. Add a treeview to a form and add x nr of root items (and 1 sub item to each item).
2. Expand a number of nodes. The non-standard thing here is that we are changing the node integral height because we display a usercontrol with the treenode (See example of the code below).
3. When you scroll afterwards, you cannot scroll to the bottom node. The scrollbar is all the way down, but we are not seeing the last node.
Public Shared Sub SetNModeHeight(ByVal Node As TreeNode, ByVal IntegralHeight As Integer)
'Create instance of tvitemex structure.
[Code]....
I am working on moving applications from Windows 2000 to new server Windows 2003 R2(64 Bit). I noticed that there are some VB programs and config files for those programs have been placed in Windows 2000 Registry. Some other applications are using them from different servers.Why do we use registry here? How can i move these to registry in windows 2003? Can I just move these or do I have to write VB programs to place them in 2003 registry?
View 1 RepliesI have a .net Windows Service developed in VB.net. I have a settings file in the root directory called Connections.XML and I am setting the basedirectory [code]...
When I schedule the service this is working absolutely fine in my Windows XP machine. But when I installed the same service in our development server (Windows 2003 64 bit Server) for some reason it is not able to locate this file.
I am trying to create a simple chat server over vb that can relay messages back and forth using an echo server. Could someone point me in the correct direction to begin?
View 3 RepliesI am wanting to update our current windows forms security to something a lot more flexible. At the moment we have a single column in thew users table which is named 'Access_Level', this field holds an int value (1 to 4) which is then use to determine users access to certain areas of the application. This worked fine when the system was small, but the system is growing rapidly now so I think it is a good time to update the user access and possibly introduce roles.
[Code]...
The configuration is as follows
Remote SQLserver 2005 back-end
Windows Forms Front end (Visual studio 2008)
Is there a way to provide the username and password for the data connection from a Login form and not have it stored in a Connection string? Even better, is there a way to invoke the SQL login window each time the app starts? I need each user to be able to use his own (sqlserver) login everytime the application is started.
The configuration is as follows
Remote SQLserver 2005 back-end
Windows Forms Front end (Visual studio 2008)
Is there a way to provide the username and password for the data connection from a Login form and not have it stored in a Connection string?Even better, is there a way to invoke the SQL login window each time the app starts?I need each user to be able to use his own (sqlserver) login everytime the application is started.
I'm using vb .net 2008 with 3.5 framework. (the following 2 classes are put in a DLL that i import in a main application)
Server class:
Code:
Imports System.Xml
Imports System.Net.Sockets
Imports System.Text
Imports System.Net
[code]....
Basically in my main application i am instantiating the client class from this dll, as well as the server one. On the client form i got a "send data" (SendFISA sub) and a "connect" button. After connecting the client and clicking on the "send data" i am sending to the server a string formed of some information created when instantiating the client class from the dll (i can't make that type of data public, but i'm just using a constructor to assign values to a class object, nothing special).
Now, when the server receives the data sent by "send data" button click it responds with "PKG_SENT" corresponding to the "FISASENT" string terminator(in the module) of the string that was sent. The "WRONG_MSG" constant is for when the string terminator is different from the 2 from above.
On the local disk, if the server cannot be reached, the client saves an xml file with this data. In the dll i made a timer that ticks every 5 seconds and checks to see if there is any xml file on the disk and sends it to the server if the connection is ok (trimiteXML sub). The server would respond with "XML_SENT" corresponding to the string terminator "XMLSENT"(in the module) appended to the read string from the xml file. After the file is sent it is deleted from the local dir.
The problem occurs when i click "send data" AND there are XML files to be sent from the disk. I believe they are interpreted by the server somehow at the same time because the message is neither "PKG_SENT" nor "XML_SENT", but it becomes a combination of the "WRONG_MSG_TYPE" and "XML_SENT", "XML_SENTG_TYPE". I have no idea why this is happening and i basically want the socket to wait with sending the files from the disks until the "send data" finishes.
i have this code from msdn and added some of mine..
Public Shared Sub DoAcceptTcpClientCallback(ByVal ar As IAsyncResult)
' Get the listener that handles the client request.
Dim listener As TcpListener = CType(ar.AsyncState, TcpListener)
' End the operation and display the received data on
' the console.
Dim client As TcpClient = listener.EndAcceptTcpClient(ar)
' Process the connection here. (Add the client to a
' server table, read data, etc.)
Dim networkStream As NetworkStream = client.GetStream()
Dim bytes(client.ReceiveBufferSize) As Byte
networkStream.Read(bytes, 0, CInt(client.ReceiveBufferSize))
Dim clientData As String = Encoding.ASCII.GetString(bytes)
MsgBox(clientData)
' Signal the calling thread to continue.
tcpClientConnected.Set()
End Sub 'DoAcceptTcpClientCallback
now the question is how can i put the clientdata from a listview?
i tried to put the listview control in this shared sub but i always got an error..
Quotecannot refer to an instance member of a class from within a shared method or shared member initializer without an explicit initializer of the class
please enlighten me on this one..
im making a sort of basic server with ban and console broadcast and yea but now i thought to make evry user that's connected (tho the running server)(their ip) in to a listview with their username (that will be defined in to a textbox on the client) any idea's how to do it ? if you want here is my sevrer code :
Form1.vb (Main form for starting stoping broadcasting and such )
Imports System.Text
Imports System.Threading.Thread
Imports System.Net
[code]....
EDIT : does this server support's mulltiple connection's ?
TCP Server/Client - Disconnecting Sockets
View 3 Repliesi have lots of confused ideas like should you transfer files using tcp? Example: I was thinking, I connect to server from client, open file in binary, division by packet size(bytes), send first packet to server, get request if file was delivered succesfully, send next packet. If I do it this way i would need something to know/increase packet size.
View 5 RepliesI am trying to use the my.computer.network.ping method to check a server's ping. what I realize is that I need to open a socket. I do not know how to do that. I have a textbox with the website url.I have a label that will display ping.
View 2 RepliesI am building a client-server type applications and they are communicating over sockets. This is the first time I am doing such a program and I have been learning off a web example and thought I understood it all but it would appear I am missing something as it starts to work then errors. Here is what I have:
VB
Dim serverSocket As New TcpListener(ListeningPort)
Dim clientSocket As TcpClient
Dim netStream As NetworkStream
Dim BytesFrom(1024) As Byte
Dim DataFromClient As String
[Code] .....
All of the above works and if I open up a telnet command window I can connect to my machine running this code on my specified port and in the command prompt window 'IDENTIFY' appears as it should from the above code. But it then gets to this block an errors on the second line:
VB
'RECEIVE FROM CLIENT
netStream = clientSocket.GetStream()
netStream.Read(BytesFrom, 0, CInt(clientSocket.ReceiveBufferSize))
DataFromClient = System.Text.Encoding.ASCII.GetString(BytesFrom)
Now as far as I can tell it shouldn't be processing the first line
[ netStream = clientSocket.GetStream() ]
Until I send something back from the client because then going on to the second line its trying to process something that isn't there yet.
The actual error I get is:
Specified argument was out of the range of valid values. Parameter name: size
On the line:
netStream.Read(BytesFrom, 0, CInt(clientSocket.ReceiveBufferSize))
I am working on the client-server on my application and I am unsure which one of those method that I should use for the chat server. When I tried this:
Dim port As Int32 = 13000
Dim localAddr As IPAddress = IPAddress.Parse("127.0.0.1")
server = New TcpListener(localAddr, port)[code].....
I found that both of these methods are the same, I can connect to the server when I use either of them. tell me which one of them is the easy way and which one of them that I should use to connect to the server, send message...etc?
I'm trying to install an app on a windows server that is always on, but I'm running into problems. I've heard that I shouldn't make it a windows service (and would personally rather have a dialog app so I can see progress, etc) so I'm trying to use task scheduler. However, task scheduler keeps trying to close my app prematurely when it should only open it and leave it open.how I could have a dialog app run on startup (and stay running) on my server?
View 1 RepliesI have been developing an async socket connection server and client program. I have been testing it, and noticed that if I connect to the server from my client and then disconnect. Upon reconnecting I am on a different port(local IP still). This is fine, however when I go to send a message, and the server trys to update all the clients, it eventually hits clients that do not exist anymore. I get the SocketException 10054, and upon connecting/disconnecting enough, it no longer works at all. My question is how do I clear out these no longer useful sockets from the server? I am doing currentsocket.Shutdown(SocketShutDown.Both); and then a currentsocket.Close(); after that. When a user disconnects.
[Code]...
I have written a windows service that uses sockets to send receive data, it works fine when the server has been running and all other services have started, but after a reboot it does not work. Now I know its probably dependant on another service and I know how to add dependencies, but how do I work out which services its dependent on?
View 1 RepliesI've been converting all kinds of other things, classes, interfaces, ASP.NET MVC apps, and WPF applications, but I am stumped as to how to convert a windows forms application, as the whole structure seems to be different. Does anyone have any advice on how to tackle this problem?
I see essentially that you have two files, Form1.cs and Form1.Designer.cs. Literally translating them from C# to VB doesn't work because of some intricacies or other of how Visual Basic works. I think you /might/ be able to convert Form1.cs in this way, as it's just a constructor plus event handlers, but the designer contains the references to the controls etc. and I am not sure how to go about doing that
I have been searching for days and months on youtube,google and everywhere else about how to create a Multi user chat system, where everybody can talk to each other all at once. Some people say Winsock is the way to go and others say TCP/IP is the way to go. I have little to no experience in either one of them. So if somebody can give me a really great turtioal or show me the guide lines on how to create a server and a client I would highly appreacite it. I am using Visual Basic 2008 express.
View 3 Replies