I can't update a listbox from other class with it's own thread.
My code:
The main class: - <....>
-
public partial class mainForm : Form
-
{
-
<....>
-
private delegate void AddMessageToLogHandler(object sender, AddMessageToLogArgs e);
-
private object _sender = Thread.CurrentThread;
-
private AddMessageToLogArgs _e;
-
-
public mainForm()
-
{
-
<....>
-
_e = new AddMessageToLogArgs("Network thread created", 0);
-
networkThread = new Thread(new ThreadStart(StartNetwork));
-
networkThread.Start();
-
AddMessageToLog(_sender, _e);
-
<....>
-
}
-
-
private void StartNetwork()
-
{
-
<....>
-
tcpListener = new TcpListener(ipAddress, connectionPort);
-
tcpListener.Start();
-
_e = new AddMessageToLogArgs("Connected to network", 0);
-
AddMessageToLog(_sender, _e);
-
-
while (true)
-
{
-
client = new Client(tcpListener.AcceptTcpClient());
-
}
-
<....>
-
}
-
-
public void AddMessageToLog(object sender, AddMessageToLogArgs e)
-
{
-
if (this.InvokeRequired)
-
{
-
AddMessageToLogHandler addMessageToLog = new AddMessageToLogHandler(AddMessageToLog);
-
this.BeginInvoke(addMessageToLog, new object[] { sender, e });
-
}
-
else
-
{
-
switch (e.ColorNumber)
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{
-
case 0:
-
logListBox.ForeColor = Color.Black;
-
logListBox.Items.Add(DateTime.Now + ": SUCCESS: " + e.LogMessage + "\n");
-
<....>
-
}
-
}
-
}
-
<....>
-
}
-
-
public class AddMessageToLogArgs : EventArgs
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{
-
public string LogMessage;
-
public int ColorNumber;
-
-
public AddMessageToLogArgs(string localLogMessage, int localColorNumber)
-
{
-
this.LogMessage = localLogMessage;
-
this.ColorNumber = localColorNumber;
-
}
-
}
-
-
The other class:
-
<....>
-
class Client
-
{
-
<....>
-
private mainForm mainFormClass = new mainForm();
-
object _sender = Thread.CurrentThread;
-
AddMessageToLogArgs _e;
-
-
public Client(TcpClient tcpClient)
-
{
-
<....>
-
}
-
-
private void ReceiveMessage(IAsyncResult asyncResult)
-
{
-
<....>
-
_e = new AddMessageToLogArgs("Server got message" + messageReceived, 2);
-
mainFormClass.AddMessageToLog(_sender, _e);
-
<....>
-
}
-
<....>
-
}
-
<....>
Everything works fine - no any compile errors. Listbox gets updated from the main class, but from the client class - it doesn't. I know it's because of the "private mainForm mainFormClass = new mainForm();". This code instantiates a new mainForm class, but I need to access to already instantiated mainForm class. But how to do that? I've tried ti make function AddMessageToLogArgs a static one, but then I can't access from it the listbox. So I'm stuck here.
2  1816 
Wherever you are creating the Client Class from the main class, send the reference of the main clas to the client class
So try chaging the following
client = new Client(tcpListener.AcceptTcpClient());
to this
client = new Client(tcpListener.AcceptTcpClient(), this);
where "this" is the reference of the main class (you would have to add a maiform variable in the Client class and assign it the value sent by the main class)
So when you have to change data, instead of creating a new class (which is a complete new object to the current main form) directly use this variable to change data displayed !
Thank you very much, you are a life saver :) Sure it works and it's so obvious that it makes shame on me that I couldn't think of it myself :)
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