Re: Sockets won't connect on local network

Fri, 06 Jun 2008 14:12:44 -0700

Posted the message 'Re: Sockets won't connect on local network' on the C# forum.

How u r sending messages from one computer to another. I used socket.send & socket.receive methods. n also I have used byte buffers to send and receive messages.

: Greetings,
:
: I am writing a simple asonchronous socket component which handles
: basic communication between peers using Sockets. I am having the
: following problem:
:
: Sockets are happy to successfully connect to one another when two or
: more instances of the component are run on the same computer but
: fail when the component is tested on two separate computers. The
: following occurs:
:
: 1. Computer 1 goes online and starts listening for connections.
: 2. Computer 2 goes online and attempts to connect to Computer 1
: 3. Computer 2 recieves "the computer actively refused this
: connection," as if the port was not in fact listening.
: 4. Computer 1's OnBeginAccept event is never triggered.
:
: I installed a sniffer to check whether the message is in fact
: getting across the network. I can confirm that a new connection is
: in fact created between the two computers every time that Computer 2
: attempts to connect to Computer 1.
:
: Both computers are on XP SP2.
:
: I have been digging at this for a while and can confirm that the
: following are not the causes of this issue:
: - The IP is not entered correctly when attempting to connect to a
: socket - in fact, it is.
: - There is a network firewall stopping the transfer - the Netweork
: Administrator assures me this is not the case, and I have disabled
: Windows Firewall on both computers.
: - The computers are not physically connected - ping works perfectly
: well.
:
: If anyone has run into this problem, I would be immensely happy to
: hear what the solution is as I am at a loss.
:
: Thanks in advance!
: Alexey

Re: Problem about System.ComponentModel.BackgroundWorker!

Fri, 06 Jun 2008 14:03:55 -0700

Posted the message 'Re: Problem about System.ComponentModel.BackgroundWorker!' on the C# forum.

sorry for the late reply...If you still facing this problem.... check this..

Did you check it only one "backgroundWorker1.DoWork"is running? You added do_work event twice in the program

: Hello
: I am using the component in VS2005 called BackgroundWorker, but
: there is something so surprising.
: This is my code:
: -------
: private void Form1_Load(object sender, EventArgs e)
: {
:
: backgroundWorker1.WorkerReportsProgress = true;
: backgroundWorker1.WorkerSupportsCancellation = true;
:
: backgroundWorker1.DoWork += new
: DoWorkEventHandler(backgroundWorker1_DoWork);
: backgroundWorker1.RunWorkerCompleted += new
: RunWorkerCompletedEventHandler(backgroundWorker1_RunWorkerCompleted);
:
: Work.ReportProgress()发送过来的消息
: backgroundWorker1.ProgressChanged += new
: ProgressChangedEventHandler(backgroundWorker1_ProgressChanged);
: }
:
: private void button1_Click(object sender, EventArgs e)
: {
: int nCount = 0;
: backgroundWorker1.RunWorkerAsync(nCount);
: }
: void backgroundWorker1_ProgressChanged(object sender,
: ProgressChangedEventArgs e)
: {
: textBox1.Text = e.ProgressPercentage.ToString();
: textBox2.Text = e.UserState.ToString();
: }
:
: void backgroundWorker1_RunWorkerCompleted(object sender,
: RunWorkerCompletedEventArgs e)
: {
:
: if (!e.Cancelled)
: {
: MessageBox.Show("complete");
: }
: else
: {
: MessageBox.Show("user canceled");
: }
:
:
: }
:
: void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
: {
: for (int i = 0; i < 10; i++)
: {
:
: if (backgroundWorker1.CancellationPending)
: {
: e.Cancel = true;
: break;
: }
: int nCount = (int)e.Argument;
: nCount = i;
:
: backgroundWorker1.ReportProgress(nCount, nCount);
:
: System.Threading.Thread.Sleep(200);
: }
: }
: ------
: If i click button1, the component runs and ends, but the second time
: when i click button1, i found that there was two new threads created
: by the component.But i just use only one BackgroundWorker!!
: So what's wrong. i felt so surprised!
: Could you help me?
: Thanks in advance!
:

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Re: Sockets won't connect on local network

Re: Problem about System.ComponentModel.BackgroundWorker!