Setting Up Client/server Connection!THesis?

Mar 11, 2010

I am a newbie in VB.NET I am using Sql Server Express 2005 as my database.I am currently working with my THESIS. A Human Reources Information System that concerns only with the file and record management of the employees. With two modules.a. Administrator for HR Manager (w/ installed vb.net and sqlserver express 2005)b. Staff for HR Clerk(w/ intalled vb.net)

Here is my problems:

1. I want to learn how to connect my vb.net application in each other using TCP/IP or any network connection tips.Scenario: If the client Save/Edit/Delete/ a record automatically it will saves on the admin sql database.

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VS 2008 Chat Server/client - After The Client Clicks Disconnect Or Closes By Task Manager, Looses Connection

Aug 18, 2009

Im using the code from [URL] as a starter, most of the code is the same. the chat system works fine but on the client a added a disconnect button "clientSocket.Close()" and as soon as i click that i get errors, on the client, this is the code...

Private Sub getMessage()
For infiniteCounter = 1 To 2

[CODE]...

And this line...

serverStream.Read(inStream, 0, buffSize)
gives me "Unable to read data from the transport connection: A blocking operation was interrupted by a call to WSACancelBlockingCall."

Now im talking the server, after the client clicks disconnect or closes by task manager, looses connection, etc the server crashes and gives me.

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Nov 28, 2009

This emailing code wont seem to work in my program. I get an exception "The SMTP server requires a secure connection or the client was not authenticated. The server response was 5.5.1 authentication required."

Imports System.Net.Mail
Public Class emailStudent
Private Sub sendEmailButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles sendEmailButton.Click
SendMail()

[code]....

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Connect VB Client Application With SQL Server Using TCP Connection (LAN)?

Feb 15, 2012

I've been Searching the Net for hours now, and i can't really seem to find anything clear and straight to the point.

I need to create a Server/Client application using VB.net 2008, it's actually my first time to have a database on another computer. So I first searched the internet for the things i need to make this software.

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Connection String For Client-server Application?

May 5, 2012

I want to create a client-server application, it means I just need 1 database on the server.I have a computer and a laptop. I set my laptop's IP to 192.168.1.1 and my computer's IP to 192.168.1.2.Now I place the database on my computer, the database name is db_transportasi.Problem is, how to connect my computer's database from my laptopSpecification :I'm using this string below for my connection :Data Source=ARVID-THEODORUSSQLEXPRESS;Initial Catalog=DB_TRANSPORTASI;Integrated Security=TrueI already setup my SQL Configuration Manager, enabled the TCP/IP, switch to the IP Addresses tab and set the IPAII Port Properties to 2301I turned off my firewall so I don't have to set any exceptionQuestion

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Nov 5, 2011

I have a TCP connection code for client and server communication. It's not meant to be malware but it collects the clients computer information and then connects to the server.

It successfully "connects" but then immediately disconnects.Here is the code for the server:

Dim Listener As TcpListener
Dim Client As TcpClient
Dim ClientList As New List(Of ChatClient)
Dim sReader As StreamReader

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I have port forwarding all done and it works if I run the client and server on my own machine. If I run the client on another machine though It gives me a message box saying that it connected with the clients remote IP and at the same time it tells me it disconnected. The client never sends the system information. What is the problem?

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I Downloaded MySQL Connector (the latest, 6.1.X), and i cant really understand how to use it in VB.Net... I Added it to references. All what I need to know is what imports to use, how to set connection with remote server and how do I select and insert to tables.

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For almost a week I am reading and trying to find a solution for checking connection state using a TCP Client (using socket class) In my scenario I have a TCP Client that is connected to a server (it is not controlled by me) and i want that from time to time to check the connection state, and reconnect if necessary.I have read a lot of information on the internet but i did not find a suitable solution.Briefly, these are the methods that i have found on the internet and try to implement.But unfortunatelly, i have found some scenarios where the TCP Server is closed and the TCP Client is still saying Connected 1.Example from MSDN

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C# - Push Website From Server To Client Using Wifi Connection?

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I want to make an application that can push ads (website) to client..

Here is the case : Client try to connect to internet via wifi. Once the client is connected, server send a website address to client, and a popup (website sent by server) will appear in the client's computer in default browser.

I can list all IP connected to server, but i don't know how to push the website to client

Here is the code to list all IP connected to server : (import System.Net library)

String strHostName = "";
if(args == null || args.Length == 0){
strHostName = Dns.GetHostName();

[Code]....

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Sep 13, 2011

I want both the client and server to write and read resp. at a constant rate (which can be configured on the GUI of the client) to the buffer.I am able to send from the client at 150 bytes per packet Now, I should be able to read also at 150 bytes per packet on the server too Since, both are connected through a socket, can we retrieve the socket params (set on the client size, like 150 here) from the server end, using the tcpServer object.Or is it must to send an initial setup packet which tells about these client params and so accordingly the server can continue?

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So I'm making a Program to Start/Restart/Stop and running commands from the Console for my Server.Now when someone uses the console, I want to be alerted of it on my Mail.I am using Visual Studio 2010.

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Using Vb Express 2005 Build A Client And Server Connection?

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C# - WCF ReceiveTimeout Infinite - Keep The Client-server Connection Endless Open

Mar 6, 2012

I'm using a "wsHttpBinding" with a reliable session. I'd like to keep the client-server connection endless open. Therefore I need to set the ReceiveTimeout to "infinite". Has the "ReceiveTimeout" an other purpose (e.g. client crash detection; detecting a hanging request; etc) or can I set it to "infinite" without problems?

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Error The SMTP Server Requires A Secure Connection Or The Client Was Not Authenticated

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The error is below

System.Net.Mail.SmtpException was unhandled
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[code].....

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I have a little problem with application setting in VB.net 2008. I want to switch main server and backup server connection string with combobox. [Code] It did change the Application Setting connection string in the main form when combobox1 was changed. But the problem comes, when child form was called. On the child form there is DataGridView with Dataset using application connection string. Even the Backupserver was selected on the main form, child form dataset connection string doesn't change. I don't know how to pass the current connection string to child form dataset although it is set to use application setting.

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Client:

Public Sub SendMessage(ByVal msg As String)
Try
SyncLock myclient.GetStream
sw = New IO.StreamWriter(myclient.GetStream)

[code]....

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Now what I need to know is How we can identify the connection lost between Server and Client?

I need this to be implemented in the Client side. If there is no connection then Client should automatically close the connection. Once the connection with the server is available in the next attempt it should connect automatically.

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basically i just want client to say "C: emp" ENTER

then, server must reply with all its files in c: emp

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The problem I have is: When I click on cmdListen in the server form and cmdConnect in the client form,both programs won't respond and they crash for some reason I don't know.

Client source code:

Code:

Imports System.Net.Sockets
Imports System.Text
Public Class Form1

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Code:
Imports System.Net.Sockets
Imports System.Text
Public Class Form1

[CODE]...

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Mar 30, 2009

I've basically made a basic tcp server/client application. The thing is that I'm behind a router and so will be the other people that use my clients. I've had to use port-forwarding or the software "rinetd"to run quite a few applications online.

Let me explain: I'm on a lan network that connects to the internet. Whenever I want to host a server - for instance a basic ftp or http server. If I give my external IP to anyone, they won't be able to access my server. Even if I portforward, it doesnt work. I have to use rinetd here. For other applications, portforwarding works. I'm not sure how these things work at all.

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I have been reading through Atheists posts in regards to client-server and TCP client/server connection's. But how do i go about writing a program with 1 client and server where the client side creates a text file.Once the server sees there is a text file it connects and downloads it to itself or the client pushes the text file to the server.Once on the server i will read the text file and put its info into a sql db.

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Chat Client to Client Without Server Just Use IP Address For it?

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After running the following sub (VS debugger), I try to detach the database in SSMS, but it shows the connection open still and won't let me detach. If I close program in debugger, the database shows no connections. I check the dataadapter's connection in the finally block and is shows closed. What gives

Private Function ClientMasterDBFiles(ByVal MasterClientDBConnection As String, ByVal DBName As String) As DataTable

[Code]...

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VS 2008 Multi-User Chat Program (Server & Client) With Main Server?

Aug 10, 2009

Multi-User Chat Program (Server & Client) with Main Server?

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Clinet/server The Server Broadcast Media Files To Client I Used Tcp/ip Protocol?

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i have 2 application clinet/server the server broadcast media files to client i used tcp/ip protocol the server code is work good but i have a problem in client code i need ineed someone to correct the code .iwll show where the error is in the code note: i call the class in the main form dim a as recive in the starter of the main form class to be gloable .

[Code]...

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Jul 9, 2009

I wrote a VB code to call a sp in sql server 2005, which returns a recordset as follows:Dim objRecordset As ADODB.Recordset Set objComm = New ADODB.Command

Set objRecordset = objComm.Execute If Not objRecordset.BOF And Not objRecordset.EOF Then
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Oct 26, 2011

I made a simple TCP server (I've found the example on the web) in VB to receive data from about 40 TCP clients.The clients are not synchronized but sends data about every 18 minutes; the problem is sometimes several clients sends data at the same moment, so I can't receive data.I also made a second program that reads the data (server program writes data on a file, read from the second program) scheduled.

My question is this: I've seen on the web examples about Multithreaded Server Socket Program, so I suppose this could manage my 40 clients (but now the clients are syncronized and send data at the same time in client mode) or is better get data (I have a central client that asks data to all 40 devices in server mode)?

Second question: can I make a single program where I run both TCP client and TCP server at the same time?

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