Cannot Connect To Network To Send Data Through Message Board
Nov 2, 2009
I have this codes here whereby my objective is to develop a writing network applications of programming, a means of sending data to a message board(messaging system). My problem is I couldn't connect it to the server's IP address and port num to send a data through a message board. However I could only display at Form2 txtReceive.
Text = HexConvert.Data_Asc_Hex(sData),
Whereby this code could only convert whatever data(txtSend) that is being typed in, could then convert hex decimal into a textbox(txtReceive). The final result that I would want to achieve is to be able to display the at the textbox(txtReceive) is the <"message protocol"> & <"hex message that is being typed"> & <"parity bit"> into the txtReceive box.
Form form 1, my codes are....
Imports System.Net.Sockets
Imports System.IO
Public Class Form1
Const portNo As Integer = 1234
Dim client As TcpClient
[Code] .....
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Aug 18, 2009
Here is my idea so far: I have a bunch of computers connected in a local network. One of them is a MySQL server, one will have a vb.NET program wich will act as a "second server" and the rest will be different clients. What I want to do is that the "second server" will send out some kind of message or network package to some of the clients in the network, and they will execute a code based on what message it is, or what kind of package it is. I'll give you a simple example:
[Code]...
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Oct 20, 2010
to do a program that can send a message in other computerthru LaN or Computer NetworkExample im in Server and i will send it is \PC-01here is the picture i design it but i don't know the code
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Jun 21, 2010
I want connect with other user through ip address and send them a message how it will don in vb.net
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Jun 11, 2011
how to send a message to another computer in my companys network using visual studio 2008...I would like to be able to list all the computer names on the network and select certain ones and send them a message that would pop up on their screen
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Mar 23, 2011
I want to create a program that will send data across my network to another computer. The data will be taken and used as sort of a command for the computer to load a webpage, or whatever I decide to do with it. I was familiar with the winsock control in Vb6.
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Nov 4, 2011
I found similar forum thread [URL], but he don't have answers. How I can conncect | send | recive data using tcp connection with specific internet service (not web).
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Mar 19, 2012
i have a task to create a TCP Server (a program that is listening on its network card interfaces for incoming data stream).I have search on the internet and i found that i can use two methods : Socket or TCPListener class.I have created an example for Socket class, but i wondering how could i test it? I need to check that if another computer in the network send some string data to the listener computer , then this message should be displayed.Here is the example from microsoft that i am using for TCP Server using Socket:
Public Shared Sub Main()
' Data buffer for incoming data.
Dim data = nothingc[code]....
But it does not work because of the PORT setting.If in the TCP Server i have "Dim localEndPoint As New IPEndPoint(ipAddress, 0)" the client crashes, but if i change the port from any (0) to 11000 for example,the client works fine.Do you know why?
Later edit2:Maybe i should have started with this question:Which method is recommended for my scope?asynchronous or synchronous method ?
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Feb 10, 2009
how can i connect handpunch with vb.net through network
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Nov 9, 2010
I doing a school work where I need to make my Network cam to show in VB
Preferable In a Picture box because after that there need to be done some motion detection.
But thats work for after. First I need to make My ip cam show op on my screen.
The way I can access my cam is by going to 192.168.168.54.
I also saw something like the Icam class but this works for normal web cams.
But is there something like the Icam Class for a Network camera.
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Feb 3, 2010
I'm just getting started with VB.NET and SQL Server 2005. I have VS2008 installed on my machine. My SQL Server is in a domain that my machine is not a part of. Here's my code that I'm using to establish a connection:
Dim conn As New SqlConnection
conn.ConnectionString = "Server=SQLServer.hbug.lan;Initial Catalog=HUGRegistration;Trusted_Connection=True"
This code is part of a console app. that I'm using as a test. I'm just trying to set up a simple connection and then read data from the database. When I run this console app. in VS, the program hangs for a few seconds and then I get an error "SQLServerProvider has stopped working". My options are Debug or Close program. When I choose Close program, then an error pops up in my console window "Error: Unahandled Exception: System.NullReferenceException: Object reference not set to an instance of an object. I assume this error is spawning from not connecting to the database properly.
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Aug 30, 2010
I Have a batch file in a server in my network. I maped that shared folder (that batch file exist in it) every time that I want to run that batch file first I should have to connect to that network drive(with username and password) How can I do it in my code . I want to connect to that network drive by code in my form_load. I test codes below but it dose'nt work.
AppDomain.CurrentDomain.SetPrincipalPolicy(Princip alPolicy.WindowsPrincipal)
Dim idnt As New WindowsIdentity(username, password)
Dim context As WindowsImpersonationContext = idnt.Impersonate
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Feb 12, 2011
How can I connect to a network share without using System.Diagnostics.Process.Start?
I need to connect to a network share and get feedback if it already exists.
Can I use some kind of API?
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Apr 24, 2011
Using VB.NET how do I connect to an available wireless network. I have been able to list all the available networks.
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Aug 16, 2006
I've just installed an IP Camera in our network and started to fool around with it. The software supplied by the camera itself is written in Delphi and pretty much doesn't do much. I was wondering if there was a way to connect to this Camera from the network with VB?
[Code]...
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Oct 5, 2010
my old vb6 "WNetAddConnection2 Lib "mpr.dll" no longer work in vb.net 2010. at run time i get "PinvokeStackImbalance was detected".How can connect to network share ?
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Feb 7, 2010
I make my Program to Connect via Network to Database..[code]
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May 28, 2009
About connecting through lan network with sql. i try all ways but not yet. I depended on another for this by Teamviewer4.0 but he only used sql 2000 and he didn't modify. In last thread . JM advise me " I dont have to change information at client and i only connect string to correct server name but i tried and it is error........" created account of window for user in server ...... -> it is still error.
FINALLY. I am very tired and sad about connecting through lan .( may be using Teamviewer4.0)
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Feb 4, 2010
I am trying to remotely connect to servers on a network. However, an exception occurs and I can never connect. The code I am using to connect to the servers does work because I have had someone else test it. The exception is shown below. Is this a setting with VB or with my computer?
System.Runtime.InteropServices.COMException was caught
ErrorCode=-2147220308
HelpLink="C:Program FilesPIPCPISDK..Helppisdk.chm"
Message="The specified time is invalid "
[code]....
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Apr 29, 2009
I have a program running in many machines in a network. The program reads a Sql database, and there's a table showing one table in a DataGridView in each computer from the same DB stored on the server. The same table in all the computers. What I want to do is, every time one computer changes something in the table, to update every table in all the computers.
Every program writes an entry in the database to know that they are connected to the DB. So any program can know who the other computers are.
How can all the computers know that there was a change in the table? (the idea is the get the changes quickly)
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Oct 25, 2010
When program runs, it automatically connecting to pppoe or other like networks... How can i do that???
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Jul 6, 2009
I want to connect an access dabase from a central server using vb.net 2005.
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Dec 31, 2010
I need to know how to find wireless network and connect to it.
i also need to know how to type in the network key before connecting.
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Jul 14, 2011
I have an application where i have to schedule some msg to my network users and as per the sheduler msg should be popup on their machine on local network.
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Jul 14, 2010
I am using Microsoft visual basic 2010 and SQL server 2008.I develop a small database application and it run well on my pc.I built and distributed the application to other pc on the same network, but when I run the application from other pc I got error message like this:A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections.(provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)[code]
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Mar 29, 2011
I am thinking about creating a program that when a browser (such as IE) opens it will turn my connection to the internet on, and when the browser is closed it will disable my connection. What type of things do I need read upon in order to accomplish something of this nature?
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Mar 3, 2010
I'm trying to connect to a database on a big corperate network (access db). I can not load my application and DB on a shared network drive as it does not have the correct permissions. How else can I try connecting to a db of some sort and allow users to insert/edit/delete rows? as it's a network drive I can not install a DB such as SQL Server on it.
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Jul 19, 2009
I'm writing an app that sends messages over a network to another PC that processes the message and sends back a reply (e.g. a boolean or some other data). My network communication subs (based on WCF) just give me the ability to send a message to the other PC and process any received messages.The issue is that any response received is processed by my designated network message event handler sub, but I have no way of feeding it back to the sub that called for the original message to be sent.
[Code]...
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May 26, 2010
I have never programmed a network program before and would like to learn at my own pace. Also I am not asking anyone to write this complete program for me, just bits of code to help me write a complete program. (though if you do code it all I won't complain.) I already tried using internet tutorials but none of them seem to work.I am trying to program a simple form with 4 buttons, and 2 users.The first button is a connectivity button. "Green" for connected, "Red" for not.The second button is a "Connect" Button which will connect to another computer with this program installed/active. (I want it as simple as possible)and the next 2 buttons switch between "1" and "0" depending on user input(Default "0"). the first button is the local user button and the second is the remote user button. When the local user clicks the local button then what he/she changes it to will be displayed at the remote site. The same thing will happen with the remote user.
I know how to place all the buttons where they belong, and to change the local text, but I have no Idea how to connect to a remote program or to pass messages between the two users. Can anyone suggest some Simple code to do this. (something that I will be able to learn and use to make more complex code later on.)
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May 1, 2009
I was wondering if there is an easy and fast way to send an image (or files in general) which is small, as in around 30KB, over the network using VB .NET. the most i was able to do at one point is to read the image (or file) as text, then send each character over the network, but it took way too much time for the file to get sent, and then translated from text to file once again on the other side. I don't know much about network programming, because i just started learning about the subject.
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