TCP Client - set timeout C# CF 3.5

Question

I have mobile RF terminal with Windows CE 6.0 CF 3.5 and I need send data as quickly as possible to my server. Problem is that wifi connection is not stable enough in place of use. I reduced the loss of data with repeated sending when connection is aborted by exception. But time for exception is ~21sec and it's too long for me. Repeated connections are successful (mostly), but I need shorten time for exception, or find different method for connection.

For data receive I have TCP server in terminal. And here I have one thread with timer and after my timeout I close client (TcpClient) and catch exception from this :-). But I mean that this method is not ideal.

Any ideas?? Thanks!

Below is my code for TCP client connection

    internal string TCPsend(string strMessage)
    {
        string exception = string.Empty;
        TcpClient client = null;
        try
        {
            client = new TcpClient(IPServer, PortServer);
            client.SendTimeout = 500;                        //no effect
            Stream stream = client.GetStream();
            StreamWriter strWriter = new StreamWriter(stream);
            strWriter.Write(strMessage);
            strWriter.Close();
        }
        catch (Exception ex)
        {
            exception = ex.ToString();
            utility.SaveExceptionLog("SendTCP A: " + ex.ToString());
        }
        finally
        {
            if (client != null)
            {
                client.Close();
            }
        }
        return exception;
    }

In the code you have posted, the majority of the time will be spent opening and closing the connection, It is far more efficient to keep the connection open and use a periodic heartbeat message to detect a network break in the absence of other traffic to do so. — tcarvin, Feb 19 '14 at 13:20

score 0 · Answer 1 · edited May 23 '17 at 12:29

0

If you want to take connectivity check into your hands, probably you should open new thread, where you will check in a loop for an established connection.

Here is the answer where the trivial check disscussed: What is the best way to check for Internet connectivity using .NET?

This will impact on overall sending performance, but should reduce the waiting time.

edited May 23 '17 at 12:29

Community

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answered Feb 18 '14 at 08:55

Rodion

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TCP Client - set timeout C# CF 3.5

1 Answers1