Remarks The BeginWrite method starts an asynchronous send operation to the remote host. Calling the BeginWrite method gives you the ability to send data within a separate execution thread.
We have decieded to use a NetworkStream not sure if that is the best approach. In order to read data, our app needs to send write a command, and then read the response. We are sending 5 commands back-to-back syncronous every 4 seconds.
These commands are added to a queue and processed in order by the method below. So, my problems are as follows: After writing to the stream, I don't know how long to wait for a response. I would prefer not to wait 1 or 2 seconds if I only need to wait miliseconds.
It seems the response times vary between miliseconds but that's just a guess.
When a response is received, it's not always the full response. Meaning, I am using steam. DataAvailable to check if any data is on the stream, but this does not gaurantee me that the full response is ready to be read. I'm not sure of a better approach.
Sometimes the response comes back out of order?
Jun 19, · The NetworkStream object (from alphabetnyc.comeam()) keeps a reference to the backing socket (i.e. alphabetnyc.com), so it keeps it alive from GC and finalization. In #2 above, I mentioned that you must check the data itself to see that you received a whole, integral request and that you can now start processing it. Some protocols do this using a terminator character (e.g. \n, which may or may not be a candidate for #1 above, or possibly other characters). My question is about the "alphabetnyc.com" When I connect to the smtp host in my sample/example application, I recieve all the standard smtp information I would normally get. My particular problem is this: When I send data to a remote host using alphabetnyc.com, I suspect I'm doing it incorrectly.
What I'm assuming is happening, is that my requests that I send back-to-back are stepping on each other. But I don't know how this would be possible since they are sent syncronously. The other concern which may be related to issue 3 is that I never close the connection and therefore the stream.
Because I am reading so frequently, I thought it would be okay to keep it open. Because NetworkStream has no "flush" method and supposedly doesn't need itI'm not sure how to check if the stream has any "old" data in it.
Here is the main piece of my code that I believe needs to be fixed. It does the writing and reading on the stream: Please note the timer is stopped while the method is running and started again after the method completes.
The "command" timmer is never stopped, but the processing of all 5 messages only takes about 1.
Hardware response comes in the form of:On the Windows machine, I use ncat to write the transported data to a file and verify that exactly bytes have been received. The latter sometimes fails for Mono I have changed the code around the alphabetnyc.com call in the alphabetnyc.com method to actually check .
' Check to see if this NetworkStream is writable. If alphabetnyc.comte Then Dim myWriteBuffer As Byte() = alphabetnyc.comes("helo me" & vbCrLf) alphabetnyc.com(myWriteBuffer, 0, alphabetnyc.com) Else alphabetnyc.comine("Sorry.
You cannot write to this NetworkStream.") End If ' Check to see if this NetworkStream is readable. Jun 19, · The NetworkStream object (from alphabetnyc.comeam()) keeps a reference to the backing socket (i.e.
alphabetnyc.com), so it keeps it alive from GC and finalization. Check to see if the NetworkStream is writable by accessing the CanWrite property. If you attempt to write to a NetworkStream that is not writable, you will get an IOException.
If you receive an IOException, check the InnerException property to determine if it was caused by a SocketException. ' Examples for CanWrite, and CanWrite ' Check to see if this NetworkStream is writable.
If alphabetnyc.comte Then Dim myWriteBuffer As Byte() = alphabetnyc.comes("Are you receiving this message?") alphabetnyc.com(myWriteBuffer, 0, alphabetnyc.com) Else alphabetnyc.comine("Sorry. For additional information about writing callback methods, see Marshaling a Delegate as a Callback Method.
Note If you receive an IOException, check the property to determine if it was caused by a SocketException.