Send Data With Socket?

Feb 21, 2011

I want to connect with a barcode printer and sendhim some specific characters and take back anything they send to me

[code]...

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MSDN Socket - Call The Send Sub And Insert Data ?

Dec 21, 2011

I have been working on an ongoing project using socket communication.

I am using this code [URL]

The problem I am having is I am unable to figure out how to call the send sub and insert data into it. I have been able to do it before by removing the second class out and leaving it in the main class (if that makes any sense).

Imports System
Imports System.Net
Imports System.Net.Sockets

[CODE]...

These are the small modifications I have made to it so far. What I am trying to do is when I press a button, it calls a sub routine that takes the text input from a field and sends it to the send sub routine in this code.

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VB 2005 - Socket Send Only Few Peaces Of Data And Loose A Big Part Of It

Nov 25, 2009

i'm developing a server application using vb.net and i'm facing a problem. in fact i have a huge data to send to the client via the socket so i use a loop to divide the data and send each part the problem is that when i proceed with the sending the socket send me only few peaces of the data and loose a big part of it. i tried to flush the buffer after each sending but i didn't find how to do it so i used a system.threading. thread sleep between each socket send. it works when i don't have huge data but it blocks my server when the number of packets increases. is there a solution that would replace the. sleep one without blocking the application?

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Asynchronous Socket Programming Vb 2008(.net) Again Server Should Able To Send The Data To Client

Feb 2, 2011

I am facing problem in asynchronous socket communication.

1)I wanted to perform connect(from client to server) operation on enter button and send the data whatever client want to send and disconnect from server. And again client should get connect to server whenever client wanted to send data. this is the mechanism.

i.e how to reuse the socket.

2)Again Server should able to send the data to client.

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Communications :: Socket Behaviour - Created A Client That Can Send And Receive Data Via TCP Sockets

Aug 26, 2010

I have created a Client that can send and receive data via TCP sockets. The objects stored on the serverside are the *exact* same object used for the client. They use the same send and receive protocols.

Now, when i send a string from the server to the client , it does precisely what it should do. However when I send a string to the server.... I do receive the string as an equal length of NULL characters. I run the server and client locally.

Basicly what can influence the behaviour between two completely identical objects performing the exact same task? I wonder if there is some socketflag issue if the TCPlistener.accept function returns a completely different setup then the one I R used to.

(if it is of any interest, the send protocol is asynchronious)

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Reate A Socket Class In Project To Send Data To Ecr (electronic Cash Register)?

Jan 9, 2012

I am trying to create a socket class in my project to send data to ecr (electronic cash register).Ecr comes with software that listens for commands on port 3535. Command are in forms of XML Files. It has only one catch, I must close the connection on socket, so the ecr would know when to process the command and respond. Since I only send one command at a time,I need the simplest solution I can get.

How it works:I create the socket and connect it to 192.168.1.67:3535 I start

client.BeginReceive

Then I send the command with

client.BeginSend

And I do a

client.Disconnect(True)

so I can get response from ECR.And in 8 of 10 times it works just fine. The problem is this few times it doesn't work.At that time I cant receive anything because it reports that the client is not connected in ReceiveCallback but it still manages to send the data to ECR just fine. The bill comes out on the ECR, but I get no answer about what happened.

I call the class like this:

Dim dre As New HCPSocket
Result2 = dre.Otkucaj(Command1, "192.168.1.67")
Debug.Print(Result2)
dre = Nothing

End the class looks like this:

Imports System
Imports System.Net
Imports System.Net.Sockets

[code]....

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Client Socket - Send Message Through Client Socket Receive Specified Argument Was Out Of Range Of Valid Values

Oct 15, 2011

Below is my code, but when i send the message thru client socket i receive Specified argument was out of the range of valid values. Parameter name: size

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim serverStream As NetworkStream = clientSocket.GetStream()
Dim outStream As Byte() = _
System.Text.Encoding.ASCII.GetBytes("0800822000000000000004000000000000000920092126012345001")

[CODE]...

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.NET Socket Send & Receive Not Matching?

Feb 29, 2012

I have these following lines to send bytes using socket

Dim server As New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
Dim myIp As IPAddress = IPAddress.Parse("myIP")
Dim ip As New IPEndPoint(myIp, Int32.Parse("myPort"))

[Code]....

As in the code, I am supposed to retrieved "Halo". Instead I keep receiving sth like "[]".

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Send File With Windows Socket?

Jan 10, 2010

I`ve been reading alot of tutorials on hwo to do this but i can never get it to work. I have a file named Book1, and I want to move it and call it "Book2".

There are .xls (Excell spreadsheet). Something is wrong with reciver when I open Book2 It says "System.Byte[]"

The test file "Book1" Has "Dog, Cat, Cow," In A1 A2 A3.

I think my byte conversion isn't working.

A tutorial said to use "Encoding.ascii.getstring(byte)" but Encoding is not delaired.

Imports System.Net.Sockets ' Allows us to make and listen to connections from another user
Imports System.Threading ' Multi Threading

[Code].....

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Socket Async Send / Receive

Jan 5, 2012

I coded a small tcp server/client software implementing the async methods of the socket object. In order to keep track and control of the transfered data on both sides, I decided to wrap the bytes to be transfered into small 65 000 bytes packets, sent one after each other, in varying order.In most cases, it works perfectly, and it is impressively fast. However, when I want to transfer larger data than my usual requests, say like a dozen megabytes, crippling problems start to appear, out of shit.Effectively, it seems that somehow when executed without pauses, the server sends the packets too fast, or that the client receives it too slowly. However, if I put the SendAsync method's thread to sleep for like 100ms before sendingthe next packet, everything arrives without problem on the client.[code]

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Socket Programming Send / Receive BitArray

Apr 18, 2011

I need to include in my application that can receive connections from a client( or two).I am thinking, that I would like to have the clients send a "TelegramID" so that I may now how to process the code.Following the "TelegramID" would be a structure that would need to be processed.So far, I can use a single client and send just plain text but need some direction for my end goals.

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Communications :: [2008] Socket Programming - Receive / Send?

Mar 6, 2009

I realize this is a broad question, but how do I recieve / send packets. I know what packets I need to send and what Im going to recieve, but I dont know how to send / recieve them.

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VS 2005 Structure To Byte Array For Socket Send

Aug 28, 2009

I am trying to communicate with an external device and i am trying to send a byte array to the external device via sockets but i am always getting a response the message size is too small so i am not sure what i have done wrong. Between the data type there should be no alignment present and all numbers are represented in little endian format. The char array is not null terminated as mentioned in the protocol specifications.I have to send data based on a struct that embeds 2 other struct. So here's my vb.net code for the struct used to convert to byte array and the sending part.[code]

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Dont Get Any Data From Socket When Data Should Be There And No Exeptions Raised, Connection Is Open. Using DataAvailable To Wait For Data

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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2005 - Discard The Contents Of A System.Net.Sockets.Socket Send Buffer Using TheSocket.IOControl(IOControlCode.Flush

Jun 10, 2012

I'm attempting to discard the contents of a System.Net.Sockets.Socket send buffer using theSocket.IOControl(IOControlCode.Flush, .... Does anybody know whether VB.NET supports this command? I've tried supplying 'Nothing' and 'Nothing' for both required parameters, also empty and populated byte arrays in combination with 'Nothing' for both required parameters, but I consistently get an 'Invalid argument' exception. I've tried a web search for an answer, but the only mention I've found was a question asked about 8 years ago, with still no answer.

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Reading Data From A Socket (as Bytes) And Storing Data In A String?

Nov 29, 2009

I am reading data from a socket (as bytes) and storing this data in a string. Then later i need to access specific bytes within the string and do some math with them. However the bytes that I read back from the string are not what I am expecting.

[Code]...

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Change Byte() To Structs For Readability And Convert Struct To Byte Stream For Socket Send()

Dec 8, 2009

I just converted the following code from c# to vb.net. It is functional and works correctly with my company's firmware/devices. My next challenge. Previous serialport code used much more readable structs which where then converted (after building a packet) into byte() automatically as part of the serialport encoding. (this is my understanding)How could I

1. morph byte arrays 'ToSocket' and 'ToMTP' below into structs and

2. convert into byte array for Socket.BeginSend(byte(),.....) to stream out to remote devices?


Imports System.ComponentModel
Imports System.Text
Imports System.Net.Sockets

[Code]....

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Identify Connection Lost Between Socket Server And Socket Client?

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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Data Receiving With Socket?

Sep 27, 2011

i am working on 3rd party chat software, when ever i send data to server i get incorrect buffersize of data. like when i convert that data to hex to matching header for splitting data i got huge lengths data

in the above textbox of image i have got some 0000000000000000000.... with the hex data, how can i get only only original data. The code i have used to receive data is

[Code]...

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BitConverter - Sending Data Across TCP Socket

Apr 9, 2010

Given the following information
Public Enum Request As Byte
None = 0
Identity = 1
License = 2
End Enum
Protected mType As Communication.Request
mType = Communication.Request.Identity
Debug.Print (BitConverter.GetBytes(mType).Length.tostring)
2

Why does bitconverter report that mType is a length of 2. I would have thought that passing a Byte into BitConverter.GetBytes would just return the Byte. I mean it's no big deal because it's only sending a very small block of data across a TCP Socket, but I'm just intrigued why it thinks it's 2 bytes.

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C# - Read A XML Data From TCP Port Socket

Jun 2, 2010

I have a device which send me data over a particular port. The data is in XML Format.

Now I already did a small console application which listen for the data and print out the data on the screen.

Now my plans are to deserialize the xml data or I will create the insert statement into the database.

1) The device send me the data every second (if there is data to send me).

2) I cannot say how much data the device is going to send me.

How can I make sure to capture all data without loose any information..

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Get The Length Of Received Data Of Socket?

Mar 9, 2011

I built a server to receive data from clients.But how can I know the length of every data package.

Dim bteAcceptData(1024) As Byte
Dim myAsyncCallBack As New AsyncCallback(AddressOf ReceiveData)
intByte = EndSocket.EndReceive(pIAsyncResult)

[Code].....

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More Than One Data Transaction Using Socket Programming

Oct 28, 2009

am developing an application where a client send data to server (socket Programing) and the server recevices it and shows it to the user through a list view but the client can send the data any time they want and it should show on the list view automatically... So i have put a timer and in tick event i have written the code like this the below code is working fine in onload event but then only once the client can send the data to the
server.

[Code]...

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.net - Socket Communication - Unusual Data Being Received

Feb 24, 2011

I am trying to communicate to a local AS3 Air app on my PC via sockets. The VB.Net app is acting as a server in this case while the Air app is a client. The .Net app sends data every 25ms to the Air app. I have not send any message termination. I just receive the data on Air app and process it.

[Code]...

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Communications :: Parsing Data From Binary Socket

Sep 7, 2008

I am using VB.NET and I am designing a generic network architecture in which data can be transmitted in various ways. I am wanting to strip down things as much as possible, and I do not want to transmit in plain text. My question today is regarding ideas and example code (if applicable) as far as parsing binary data that is sent over the wire in VB.NET.I want each packet to have a very generic architecture such as <packet type> <address> <payload> or whatnot. I understand that I can use certain bytes as delimiters for these packet fields. I don't necessarily want to serialize everything being that for security reasons, the same library has to be used to deserialize the data.

a) Put my protocol into binary data where each field is delimited using a certain byte

b) Parse that data from binary at the other end.

Once again, I don't want to use plaintext since this can cause a bunch of overhead in comparison.

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Receive Data From Multicast LAN IP With Socket Connection?

Mar 24, 2012

I converted some codes from python to VB 2010. My aim is sending query data to multicast IP and get the response. My query data receiving from device which is connected to my LAN. Also the device responding my query and my PC receiving the responce but at this point the VB program freezing.getting response data and printing to console without freezing.

This is the code list;

Imports System.Net
Imports System.Net.Sockets
Imports System.Text

[code]....

Here is the Wire Shark (Network Protocol Anlyzer) screen shots; My computer IP is : 192.168.0.11 and device's IP is : 192.168.0.10.

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Receive Data Through A Socket Created In Another Process

Jul 29, 2009

I am trying to implement SMPP protocol in vb. I am sucessfull in send and receiving packets using sockets. Now I would like to decentralize the functions of my program. I want to implement two programs one for sending and another for receiving using a single socket. I want to receive data through the same socket that was created in another process(i.e., the first program).

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VS 2008 Socket Connection For Realtime Data?

Feb 28, 2011

i need a little advice/help here. There is a particular scenario that is coming up and I am clueless as to how to go about it."I will soon have a lease line through which I will get realtime stock market data. This data will be available every second and it will contain prices of stocks. Now assume I am able to get that data on my local computer. How can I transmit data so that users can get that data through my software.

For e.g. assume it's 11 AM. Now if you select a stock e.g. Google, then my program should fetch data for google till 11 AM and also show new data every second or so with minimum lag. Something like a terminal where you see stock prices getting updates every second. In my case I need to get past data and show current data which get updated at short intervals."

Now I have a linux vps webserver which hosts my site. (I get one or two static ip free) What to do so that data goes from my local computer to my server and then my program (developed in vb.net) is able to get it and show it to end user. This whole system should such that its fast (real-time) and delay is minimum.

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VS 2010 Handle Receive Data On A Socket?

Sep 3, 2010

I've looked through a lot of snippets online and I see a lot of things similar to

Dim bytes(tcpClient.ReceiveBufferSize) As Byte
networkStream.Read(bytes, 0, CInt(tcpClient.ReceiveBufferSize))

but what I am unsure of when to call such a thing? How do I know when there is data to receive...in visual basic 6 with winsock, there was a specific routine which was called upon data arrival, but I see nothing of the sort for vbNet.

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TCP Client Error While Reading Data From Socket Server?

Apr 20, 2012

I have a TCP Socket Client (using the Socket Class) that is connected to a simple TCP socket server (just for testing)I have this code snippet :

Dim aSocket as Socket
While aSocket.Connected = True
byteRead = aSocket.Receive(dataByte) 'number of bytes

[code].....

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