Hi! This is my first time on Daniweb, and my first time coding a server, too. So I've tried many ways, and finally found a working one - or one that was working, until recently. For an unknown reason, my receival of data doesn't work: The data is received, it gets appended to the stringbuilder, and then, it should invoke a new ReadCallback, in order, this time, for the read bytes to be shown. However, for some reason, the call to the new callback (using a BeginReceive) doesn't work! It just stays there, not doing anything.
Anyhow, here is the code. I know I'm probably unclear, and perhaps a code is more useful. I'm sorry for the many mistakes that might be found across the code, I'm a newcomer to multi-threads, callbacks and asynchronous sockets.
public static void ReadCallback(IAsyncResult ar)
{
Console.WriteLine("Debug 0: Creating state object...");
StateObject State = (StateObject)ar.AsyncState;
Console.WriteLine("Debug 1: Created state object.");
Console.WriteLine("Debug 2: Ending receival...");
int Read = State.Socket.EndReceive(ar);
Console.WriteLine("Debug 3: Ended receival. Stocked in Read. Read={0}", Read);
if (Read > 0)
{
Console.WriteLine("Debug 4: Read>0. Appending {0} to sb.", Encoding.ASCII.GetString(State.Buffer, 0, Read));
State.sb.Append(Encoding.ASCII.GetString(State.Buffer, 0, Read));
Console.WriteLine("Debug 5: Appended string.");
Console.WriteLine("Debug 6: Beginning new receival...");
State.Socket.BeginReceive(State.Buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), State);
Console.WriteLine("Debug 7: Begun new receival.");
//WAIT! Here is the error! A new BeginReceive has been launched and should therefore throw a ReadCallback,
//but it doesn't! It just stays here!
}
else
{
Console.WriteLine("Debug 4: Read<0.");
if (State.sb.Length > 1)
{
Console.WriteLine("Debug 5: sb length>1. Data of more than 1 char has been read.");
Console.WriteLine("SUCCESS: Read {0} byte from socket {2}. Data = {1} ", State.sb.ToString().Length, State.sb.ToString(), State.Socket.Handle);
}
else
{
Console.WriteLine("Debug 5: sb length<1. Not done yet.");
Console.WriteLine("Reading... Current: {0}", State.sb.ToString());
}
}
}Thanks for your help! I know this might not be a clear and concise question as the guidelines suggest, however, even after trying to debug my own code, I can't find the source of the problem, so I'm forced to post it all.
