Pop3 (tcp Client) Connection?
Jan 16, 2009
I created some apps with the system.io and .net namespace. Sending an email and save files and such. Now I want to use pop3 to receive and read the messages on that account. I used TELNET to connect to my pop3 account and that is going well.
Here is the code I used in vb.
Dim client As New TcpClient
client.Connect("Pop3.whatever.com", 110)
If client.Connected = True Then
[code].....
How can I verify if the connection is ok and I'm logged in with this name and password? In Telnet I receive +ok after a command and input is correct, otherwise it generate -err.
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Jan 25, 2011
I'm trying to make a email client but my biggest problem is finding a component that is (preferably) free. I need one that works with IMAP and POP3. Also would be nice if it could handle sending emails (Via SMTP). It would also be great if it worked with gmail.
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Jan 15, 2011
tcpClient.Connect(hostName, 110)
Dim networkStream As NetworkStream = tcpClient.GetStream()
Dim bytes(tcpClient.ReceiveBufferSize) As Byte
[Code]....
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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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Feb 5, 2011
My TCP Client connection dropped with no error. and it seem like receive 'empty data' after every 2nd message response to server.
Below is my function which having issue
Private Sub DoStreamReceive(ByVal ar As IAsyncResult)
Dim intCount As Integer
Try
[code]....
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Dec 19, 2011
Is there a simple reason why it takes a long time to connect to a server? Take mIRC and xChat for example. Seems to instantly connect.
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Sep 13, 2009
Is it necessary to close the connection of a tcplistener or tcpclient after every message received, or is it possible to close it at a later time while it continues to receive data? Is there any major security issue with leaving it open and listening? I know trojans tend to open a listener and leave it open, will my program be detected as such? Its just a simple chat program....
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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.
[code]...
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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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Sep 11, 2011
Am developing a server - client application using the system.net class , that will have more than 5000 simultenous client connection.what is the best way to manage multiple client connection like this?
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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.
[Code]...
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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
[Code]...
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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Apr 23, 2012
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
[code]...
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Jan 29, 2011
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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Jan 21, 2012
and advise how I can change this connection string at run time. This is going to be on Client's computer and my application will need to change the name of computer after user enters it.
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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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Jun 18, 2012
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.
[Code]...
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Jul 6, 2009
I'm building application that will heavily use database (about 25k query's in few hours) , what is the best way to go:
A) use datareader and open new connection to the database on every client query.
B) load all the needed tables into dataset once the program loaded and use that dataset for the query's?
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Jan 20, 2012
I have set the connection string of my dataset(typed) asData Source=MyHomeServerSQLEXPRESS;Initial Catalog=dbTestSharing;Integrated Security=TrueThis is going to be a client side application. I need to change the machinename in the connection string so it could connect with server.
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Aug 9, 2010
i need to know about how to build connection with server and client? eg: my server is 140.134.5.1 and my client need to connect to it to do communication,how should i do?
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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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Feb 19, 2009
I am trying to get this program to send an email, but still no luck. I am getting the following error that I do not understand. I do not understand what I am doing wrong. Also, I may have an issue that the computer I am writing this code on and trying to send the message does not have ISS and is just windows XP home.
The error is below
System.Net.Mail.SmtpException was unhandled
Message="The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Must issue a STARTTLS command first. k41sm2133530rvb.6"
[code].....
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Jun 21, 2010
We are creating a Who wants to be a millionaire style game in VB. Our server is pulling information such as questions and answers from a Access Database and sending them to the contestants (Clients). All transfer of information is directly from the server to each client. One of the "Life Lines" we want to use is "Ask a friend", where one client is able to Instant message another client for a short time to get help on the question.
[Code]...
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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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May 21, 2011
I wrote a Socket Client which will send the Socket Server some data and get some response from Server. This process will be running once in every 2 seconds.
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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Sep 27, 2010
I had a problem getting a VB.NET web service client to receive the response object from a Java web service.In the process of posting this question someone from another department volunteered some code written for a similar situation.I couldn't find this anywhere on the net so I'm completing my question to help others out.[code]The web service is Apache CXF with some Spring elements mixed in.
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Aug 16, 2009
searched 2 days, but can not find a good example. any class? or free component? found one, but it is C#.
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Jun 3, 2012
my problem is i can't send command using pop3 in vb.net every time i try to send its nothing happen but i can connect in tcp client server and server reply +ok when i connect
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Sep 18, 2009
I have started a project in VB 9.0 (or if you like Visual Basic 2008 Express Edition), it's called bEdit (Basic Edit). It is like notepad for writing basic files (.bas). And now, my problem is:If you press enter to start a new line and then save the file, and then open that file in Notepad and there will be no blank line, all words will be together and blank line will be replaced with some weird ASCII character.
Source code is attached.
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Feb 15, 2012
on a mail client in visual basic, till now i can only send emails using smtp, but i am having troubles finding how to receive themsimple code on how to read/receive emails using visual basic using .Net framework 3.5 will be the best.
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