My tcp client has made a connection to the server script! Now that it has connected, how can it send a simple string? I do not know what any of the overloads for the .Client.Send method even mean, or how to use them. I already have a system set up on the server side to parse the string when it is received on the server side, but I have no idea how to send a simple string to it.
View 2 RepliesI'm realizing a .NET chat application but i still have that error: I can send only a message per connection. For example. With the code below, i can send only one message that can be received correctly by the other peer, but if i send another message message, on the same connection,it won't be received by the remote PC. Here is the code:
[Code]...
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]...
For some reason I can't append text to data I get from a tcpclient stream I have.
Dim Client As New TcpClient("server", port)
Dim stream As NetworkStream = Client.GetStream()
Dim receiveBytes As [Byte]() = New [Byte](Client.ReceiveBufferSize) {}
[Code]....
The message box will only contain the returnData string without the hello.
I have sockets receiving data from a barcode reader, the problem is the reader sends the string in chunks for whatever reason as opposed to sending the whole string, for example:
<00001>st6
comes as
<0
000
01
[Code]...
I am using Nektra's Deviare to hook winsock's send method calls. My ideia is to learn to also send messages through the same socket than the original application. So what I'm doing is when i detect the first call to send message, I save the socket id(the first argument of the send function), so I can use it later.
So here is my code:
uint socket = 0;
[DllImport("Ws2_32.dll")]
private static extern int send(uint socket, string buf, int len, int flags);
[Code].....
This last messagebox is poping up always -1. Why should be it?
edit: calling WSAGetLastError() returns 2. Which I do not know what it means, as it doesn't seem to appear on msdn.
I am working on an application that is going to read a weight from a scale. The people who sold us the scale said that I can send a string to the scale over FTP and the response I will get is the weight. I haven't done much with ftp and have been searching for weeks. Can anyone point me in the right direction? The steps are... Create a TCP/IP connection to the ip address, port 1701 If the connection is succesful then I'll get 53 Ready for user as the response I can then send the username/password to the machine (sent as a string...) Read the response, which should be 12 Access OK I then need to transmit 'r wt0101' to read the weight. The response will have the weight. They've said this is done through FTP but maybe that's not the case? I don't understand why it would be FTP but that's what the technical documents say. Is there a class I can use that sends string commands over a tcp/ip connection?
View 8 RepliesAlthough there are already a few resources online that address this rough topic, I still haven't found an answer that works for me.I desire to have full communication between my VB.net process and my C++ process. I would like to be able to send a string to and from the C++ process, but for the time being I need to achieve:
Sending a string to the C++ process, and handling it.This creates a few points that I am uncertain on, but I'll try to keep this as simple as possible...using the following function declaration in VB;[code]....
And finally, I used the IPC example here to send the message. This example sends the message using C#, but the concept was all I needed (not to mention that it's a walk in the park to convert such code to VB). Note that in my VB implementation, I didn't need to terminate the string with a null character.
this is my vb.net code -
in the subroutine i have -
Private Sub xxx()
[code].....
I didn't saw much samples about tcp file share. They look similar to what I am using to send string. My question is : Does these codes work with any kind of files? And May I have some hints about how to do it?
View 1 RepliesI have a Client/ server application where the Server is in java and Client is in Vb.net.When i send large string from client to server am not receiving complete text.code attached below.
client-- VB.net-
Try
Dim clientSocket As New System.Net.Sockets.TcpClient()
[code].....
Quote:
Dim conReader As New StreamReader(con.GetStream)
Dim conCont As String = conReader.ReadLine
It just reads the first line of the server I'm trying to connect to, I want to make it read all the messages that the server is sending. btw, con is: Dim con As New TcpClient
I am trying to Send an Email with an attachment (using Gmail) but I keep getting errors like "Operation Timed out" or Failure Sending Email". It was working earlier today but I found out that i needed to add Using statement because the email was having a file open that had to be deleted after it was sent but afterwards it doesn't work.
Here's what I have (Portion of it):
Private Sub SendMailOneAttachment(ByVal un As String, ByVal pass As String, Optional ByVal smtp As String = "smtp.gmail.com")
Using oAttach As Net.Mail.Attachment = New Net.Mail.Attachment((Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData) & "\" & My.Computer.Name & "_" & fName & " .zip"))
Dim client As SmtpClient = New SmtpClient(smtp)
[Code] .....
The ports are correct I believe, no firewall up on my PC...
Which is better for Sending Files/Sending Images/Msg for P2P Chat?
View 1 RepliesSo how does one turn SSL on in System.Net.Sockets.TcpClient with VB.NET code?
Turning it on in System.Net.Mail.SmtpClient is easy, you set the .EnableSsl property. I cannot find a corresponding property in TcpClient. It's probably buried somewhere.
During development, we usually use localhost as the hostname, like the following
Dim serverListener As New TcpClient("localhost", 8585)
I want the user to be able to enter their IP address via a TextBox instead, like
Dim serverListener As New TcpClient(textbox1.text, 8585)
However, this is not working for me.
I am creating an application that will be talking over the LAN (and eventually, WAN) which uses the Tcplistener and Tcpclient objects.Now, I have this working absolutely fine locally using the loopack address although when I change the IP of the listener to 0.0.0.0 (listening for all IPs) and the IP in the client application, to the IP of the server, it throws an exception when connecting. The client says something along the lines of the the server has rejected the incoming connection. So i disabled all firewalls temporarily but I still have the problem.I have ran netstat on the server which clearly shows that it is listening for an incoming connection on 0.0.0.0. [code]
View 5 RepliesI have an application in vb.net which will connect with an hardware device and test its functionality. The hardware device basically spits out data continuosly through Ethernet. That is it recieves some data via com ports and spits out the processed data via ethernet.So my application does both. Thats pretty much the entire app.My problem is i am using tcpclient sockets. Now when i connect a tcpclient to the device using
tcpclient.open(ip,port);
Immediately the device sends some data which comes and get stored in the clientsocket. Then i send a command to it ,only then i read the data from the clientsocket using
tcpclient.getstream().read()
at this time the entire data that is the one which flowed immediately when connected to the device and the one that i actually need after passing command is both acquired. This is undesirable. I need the data which i read only after sending the command. So i was wondering if there is any way to clear the tcpclient socket before we do a read. The manual doesnt show any such method.
I'm having a hard time getting the fundamentals down about these TCP Socket classes.
When you use TcpClient, you can set the IP Address or domain name to connect to the server end of the socket. I see examples that use "localhost" as the first parameter for TcpClient. Is this just a broadcast over the network to find the server that has a TcpListener listening on the dictated port of the second parameter of the TcpClient declaration? With any IP address for TcpClient (I realize that's an option, though), how does "localhost" find the TcpListener server?
I want to create an array of tcpclient 1 to 5. i know it can be done by arralist but how i will add array of socket in arraylist and send/receive data.
View 5 Repliesi know how to make a tcp ip connection using tcpclient and so on. But what i want to know, how to transfer file in a specific computer?
View 2 RepliesI have been reading the following thread by perito which was resolved with a great deal of assistance from Athiest.[url]...
Using the sample code in this thread I have now created a Client and Server app which is successfully sending messages over a network between two machines.
Now that I am able to send simple text messages I would like to progress to my intended pratice of sending more complex information between the machines. I have already written a program which generates and stores data with a class which I use as a data type. I would like to be able to pass this class from one machine to another.
i've a simple question: is possible to send dataset through TcpClient
View 3 RepliesDuring development, we usually use localhost as the hostname, like the following
Dim serverListener As New TcpClient("localhost", 8585)
I want the user to be able to enter their IP address via a TextBox instead, like
Dim serverListener As New TcpClient(textbox1.text, 8585)
However, this is not working for me and how can i verfiy that the user enter correct ip address .
is there a way to use my tcpclient and listener to use a no-ip host because i am on a laptop
View 5 RepliesI've been working on a program where clients will send short messages to a server.[URL]
On the server side, this code is running to check for incomming messages:
Private mClient As System.Net.Sockets.TcpClient
...
Do
bytesRead = mClient.GetStream.Read(readBuffer, 0, BYTES_TO_READ)
[Code].....
is there a way to send a command to start a prog on the tcpclient side.
View 3 RepliesI am making a contact management program that works like a chat conversation. First, the client connects with his/her name and says: GIVE_INFO. Then, the server sends the client's info that it gets from a csv. Finally, when the user makes all desired changes, the client "tells" the server the info separated by commas and the server replaces the information in the old csv with the new info.So, the program worked for 2-3 times then all of a sudden when I made some changes it stopped working[code].......
View 2 RepliesI've been searching for a way to route requests from a tcpclient through a proxy server, but I cannot figure out a way to do so. Can somebody tell me a solution?
View 1 RepliesI'm having problems retrieving the full source code of a website (it only returns partial source) with TCPClient. My code is below if you could either correct it or lead me on the right path, it would make my day. [code]
View 5 Replies