Use The .NET NetworkStream And TcpClient To Connect To A Remote IP And Wait For Data?
Oct 14, 2011
I am struggling a lot with this code I am trying to get to work. I have successfully made a connection with the TcpClient object to two separate remote machines and transmitted data to them. Essentially, I'm trying to connect to Machine 1 on port 80 and send a GET request. Once I send the request I want to keep the connection alive so that the software on the other side can send me data when it is ready. How do I keep the connection open and read data in each time it is made available in the stream? I have tried and tried using NetworkStream.Read and BeginRead to no avail. The closest I have come was sleeping my thread every 30 seconds and then doing another GET request which is not needed. Here is the current code I have for reading from the stream. I know I need a loop in here somewhere:Note: RemoteSocket is my TcpClient object that is connected by this point
Dim serverStream As NetworkStream = RemoteSocket.GetStream()
rqst = "GET /Control/Clip_Forwarding_Stream?CameraName=" & URL_Encode(Name) & " HTTP/1.0" & vbCrLf & vbCrLf
[code].....
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Dec 2, 2010
I'm using the code at the bottom to connect to a Usenet newsserver. This code works fine, but it freezes the UI, so I need to do it asynchronously.
[Code]...
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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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Jan 20, 2010
Rather than use an Entry name of an existing VPN connection, is it possible to connect to a remote network by creating a temporary connection on the fly by using the remote IP/Host name, username and password?
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Jun 23, 2011
Am using this code to connect to an SMS server to send sms to mobile phones but am getting stucked at the the bold like below:
[CODE]:.....................
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Jan 18, 2012
I'm using System.Management to start a process on a remote target via WMI like this:
InputParameters("CommandLine") = "executable here"
OutputParameters = ManagementClass.InvokeMethod("Create", InputParameters, Nothing)
This kicks off the process and my code continues to run, but I need a way of monitoring that process and not doing anything else until it finishes. Is there a simple solution? I'm hoping there's something similar to Process.WaitForExit like there is when creating a local process.
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Dec 27, 2009
I'm trying to develop a windows application where i can get connected to remote server and look for process state going in remote server.We have many remote servers where automatic installation of software going on. We have an xml file(installstatus.xml) where it tells us at what stage the installation is (Example : Inprogress , Completed, Failed.)
So our aim is to develop a windows application where i can get connected to that servers and look for their installation status(may be we can use installstatus.xml to look for installation status). Every time i connect to a server, the server information should get stored in XML file(i want to create a xml file where all the servers list i connect to should get stored)
The UI at left side should will have list of servers i can connect to. When i get connected to server, at right side of UI, i want to display the status of installation (In progress, failed , completed).
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Mar 31, 2011
I have a .Net program that has to run on a cluster of server 2008. To find out the right IP I resolve the dns by GetHostEntry(VarDefinedInfConfig).AddressList(0)
but when I am converting my old code (this code picks the wrong IP) dns.GetHostName().AddressList(0) => this returns a virtual IP and not the right one.So I changed my TcpListener to (dns is parameter from config)Dim listener As TcpListener = New TcpListener(New IPEndPoint(Net.Dns.GetHostEntry(dns).AddressList(0), 8001))
listener.Start()
[Code]...
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Jul 31, 2009
I am sending some data over a networkstream. The datasize is 97 The buffersize is 1. Data is a list of bytes. When the bytecount reaches 94 the do while loop exist itself.
[Code]...
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Dec 11, 2011
I'm using the following code to get newsgroups from a server[code]...
When I execute the code, the routine only receives one block of the data. However, if I go into debug mode with a breakpoint at the loop instruction, I receive all of the blocks of data.Am I missing something in the code, like a wait or something, that would allow the program to receive all data like happens with the debug?
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Dec 8, 2011
I'm using the following code to get newsgroups from a server:
sendBytes = Encoding.ASCII.GetBytes("LIST active microsoft.public*" & ControlChars.CrLf)
networkStream.Write(sendBytes, 0, sendBytes.Length)
[code].....
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Apr 18, 2011
I have a device that is continuously sending text over a TCP port and I want to write a VB.net application that will read and evaluate this data. Each line of text that arrives over the port can be of varying length and each value in the line is separated by a comma. I need to separate out these values in order to take various actions based on their contents.
The following code appears to read the NetworkStream fine but when I try to read the data into an array and output one field into a text file the code is only catching a few lines of the high number coming through the port.[code]....
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Jan 8, 2010
It seems the most obvious thing, but I just can't work out how to get the length of bytes sent over a network using a TCPClient and TCPListener? This is my code so far:
'Must listen on correct port- must be same as port client wants to connect on.
Const portNumber As Integer = 9999
Dim tcpListener As New TcpListener(IPAddress.Parse("192.168.2.7"), portNumber)
[Code]...
I need to get the length of the networkstream to set the size of the array of bytes I'm going to read the data into. But the networkStream.length is unsupported and does not work and throws an Notsupportedexception.
The only other way I can think of is to send the size of the data before sending the data, but this seems the long way round.
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May 5, 2008
How can I connect to a database using sql server 2000 and stored in another PC with vb net (still in 1 LAN)?So that PC only stores the database, and another PC store the user interface and business logic.Is it related to the connection strings, on the datasource, we just put the IP address for that remote sql server?
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Apr 6, 2009
how to enable remote database
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Nov 20, 2009
* Using windows application i am trying to connecting remote server(PC), for this i have servername,uid/pwd.
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Nov 14, 2009
I am having a small problem with my VB.NET and VC#.net programs. I am creating a spider program in VB.NET which parses a URL and stores data in my database. The list of URL to be parsed are included in my database. Right now the program is working fine as I am using a local database lying on my hard drive, but I want to use database lying on a remote server (ex. [URL]). How do I do that in VB.NET application?
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May 24, 2010
What is the best way to connect a remote SQLServer via window based application?
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Apr 13, 2012
I am building a simple proxy in server vb.NET and so far it has been successful, but then whenever i receive data from the internet and write it back to my browser's network stream using NetworkStream.Write the received data tends to come up slowly to my browser due to reasons i do not know of. But when I chain my application to another Proxy/listener on my local computer (e.g Privoxy), data seems to come up very fast to my browser. If anyone has an answer to this I would really love to know.btw here is the part of my code {subroutine} that receives data and forwards to my browser.
Public Sub ForwardRequest(ByVal Client As TcpClient, ByVal ClientMessage As String)
Dim Browser As TcpClient = Client
Dim BrowserStream As NetworkStream = Browser.GetStream
[code]....
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Mar 24, 2011
I have a problem reading data from an RFID-reader. I connect to the reader by tcp and wait for DataAvailable to be true, then reading the data until I got a end of data character. Then I just go back and waiting for a new DataAvailable. This is done in a own thread for the function.
There seems to be some kind of timeout, If I don't got any data in a couple of minutes, then it just sits there in the do/loop waiting for DataAvailable. I hold the card to the RFID reader, it beeps, but there is no data available. I don't get any exeptions, and the information says that the clientsocket is still connected. Are there anything more I can check?
If I put the card to the reader in a minute-interval it seems as this will never occur. So 2-3 minutes idle:ing seems to do this.
Here are my code to read data from the socket, I have taken away some irrelevant code:
Sub test(ByVal ip As String, ByVal port As Integer)
' this sub is meant to run forever
[CODE]......................
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May 11, 2012
Scenario: I want to develop an application.The application should be able to connect to my remote server and download data to the local disk , while downloading it should check for new files and only download the new ones simultaneously creating the required(new) folders. What am i doing?: The app first checks for internet connection , if available pings the server to check if the server is active.Then it has to download the new files.
Problem: I have no idea how to compare the files in the server with the ones in the local disk.How to download only the new files from the server to the local disk? What am thinking?: If i can create the exact folder structure(hierarchy) in the local disk as it is in the server...than i can download the new files accordingly to folders by maintaining some index file in both server and local disk.
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Aug 25, 2010
I am able to connect remote MS SQL Server 2005 using vb.net-->
Imports System
Imports System.Data
Imports System.Data.SqlClient
[Code]....
But my app is takes more than 2 second for refresh the data..... Sometimes it getting hanged.
Finally i just want to know if their any method available to connect the remote MS SQL Server Database for faster calculation. Like UDP or Proxy....
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Jun 21, 2010
I have connected VB.net and mySQL on a the same PC before, but I have no Idea how to connect VB.net to a remote PC(LAN)[code]...
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Jul 22, 2009
Im trying to connect to a remote mysql database, and im having alot of crazy issues, i have checked connectionstrings.com for information, im used to doing this in vb6, but times are changing and im trying to rewrite my apps for vb.net. anyone able to help with the new connection string to get it setup so i can connect to a remote database? i already installed and added mysql.data MSI isntaller on there and its version 6.0.4 i beleive, how can i make this thing connect to the database now?
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Aug 11, 2011
i connect to a remote pc via terminal services, when i print with the Microsoft Office Word i get the print in my local printer fast, but when i try to print with my own application the print take 10 seconds.
I use to print the control PrintDocument.
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Jan 18, 2011
I have a following details provided by our mssql2005 database provider
Server IP : 100.20.255.34
Databaase name : insss
User: nas0
[code]....
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Apr 7, 2009
I want to know how to connect to the webservice in remote machine
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Feb 8, 2010
I need to read a command from a .html file. To do this I use:[code]My application constantly loops to check the .html file for commands. I need it to do this, even if the internet is off. Obviously, it wont read commands if its off.. I just need it to resume reading when it comes back on WITHOUT crashing my application.Any code to ignore timeouts so where my application will still TRY to read and not crash.
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Jan 14, 2011
System.Net.Mail.SmtpException: Failure sending mail. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: A socket operation was attempted to an unreachable network 184.xx.xxx.xx:25 at
[code].....
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Oct 15, 2009
Using SMO To Find - Connect to Remote SQL Server?
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