Re: How to debug this?


"MeltingPoint" <none@xxxxxxx> wrote in message
news:_s6dnStYC5jC9tbfRVn-jg@xxxxxxxxxxxxx
> "Brett" <no@xxxxxxxx> wrote in
> news:eWx8RjZNFHA.1096@xxxxxxxxxxxxxxxxxxxx:
>
>> For some reason when I step into the code below, it jumps out on the
>> second iteration at the line I have marked below. Nothing else
>> happens - no errors.
>>
>> Dim tcpClient As New System.Net.Sockets.TcpClient
>> tcpClient.Connect("127.0.0.1", 9005)
>>
>> While True
>> Dim networkStream As NetworkStream = tcpClient.GetStream()
>>
>> 'If networkStream.CanWrite And networkStream.CanRead Then
>>
>> ' Do a simple write.
>> Dim sendBytes As [Byte]() = Encoding.ASCII.GetBytes("Is
>> anybody
>> there")
>> networkStream.Write(sendBytes, 0, sendBytes.Length)
>> ' Read the NetworkStream into a byte buffer.
>> Dim bytes(tcpClient.ReceiveBufferSize) As Byte
>> networkStream.Read(bytes, 0,
>> CInt(tcpClient.ReceiveBufferSize)) ' Output the data
>> received from the host to the console. Dim returndata As
>> String = Encoding.ASCII.GetString(bytes)
>>
>>
>>
>> Step into jumps out at above line. The rest of the code follows:
>>
>> Console.WriteLine(("Host returned: " + returndata))
>>
>> ' pause so user can view the console output
>> Console.ReadLine()
>> End While
>>
>> tcpClient.Close()
>>
>> There is a server version of the app that is sending data. Any
>> suggestions on how I can trace this down?
>>
>> Thanks,
>> Brett
>>
>>
>>
>
> Not sure what you mean, 'jumps out'. Does that mean it throws an
> exception? You can't 'step into' GetString() but I don't think thats
> what you mean.
>
> A quick solution would be to use DataAvailable:
>
> If networkStream.DataAvailable() Then
> networkStream.Read(...)
> End If
>
> OR the dangerous way...
>
> Do
> Loop Until networkStream.DataAvailable()
>
> too see if anything ever comes. (maybe put a counter in there and exit
> after a couple hundred loops :)
>
> but i think your trying to read to soon, if you wait on DataAvailable,
> all should work code wise.
>
> MP

Very nice. The

If networkStream.DataAvailable() Then
networkStream.Read(...)
End If

code is working fine. I have a general question about the byte array.
Sending/receiving data via the tcp/ip streams or file streams always uses
the byte array. Why can't a regular string be used? What is so special
about the byte array?

Thanks,
Brett


.

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