Link to home
Create AccountLog in
Avatar of RadhaKrishnaKiJaya

asked on

Get the actual data length read from network stream

Hi Experts,

I am reading data from a RFID reader using network stream. But the length of the data is always 8193. What can I do to get the actual length.
Thanks in advance.

Dim tcpClient As New TcpClient("", "10001")
             Dim netStream As NetworkStream = TcpClient.GetStream()
             If netStream.CanRead Then
                 ' Reads the NetworkStream into a byte buffer.
                 Dim bytes(TcpClient.ReceiveBufferSize) As Byte
                 ' Read can return anything from 0 to numBytesToRead.  
                 ' This method blocks until at least one byte is read.
                 netStream.Read(bytes, 0, CInt(TcpClient.ReceiveBufferSize))

                 ' Returns the data received from the host to the console.
                Dim ReturnData As String = Encoding.ASCII.GetString(bytes)
                 TextBox1.Text = ReturnData  'Length is always 8193
                RaiseEvent TCPDataIn(ReturnData)
                 Console.WriteLine("You cannot read data from this stream.")
                 ' Closing the tcpClient instance does not close the network stream.
             End If
Avatar of mrwad99
Flag of United Kingdom of Great Britain and Northern Ireland image

Link to home
Create an account to see this answer
Signing up is free. No credit card required.
Create Account
Avatar of Mike Tomlinson
Adding to mrwad99's answer, use "numberOfBytesRead" in Encoding.ASCII.GetString():
Dim ReturnData As String = Encoding.ASCII.GetString(bytes, 0, numberOfBytesRead)

Open in new window

Avatar of RadhaKrishnaKiJaya


Thank you very much. It worked.