.NET (Core and Framework)

Member 1871720 wrote:

I have written a simple application

Member 1871720 wrote:

But when I run teh program I get a JIT window with message:

An exception 'System.InvalidOperationException' has occurred in ChordFinderAssembly.exe.

Member 1871720 wrote:

Can any one help?

jwangAimCo wrote:

I am new at writing both C# code and with network protocol.

jwangAimCo wrote:

I need help implementing that code in C#.
This is what I have tried:

using System.Net.Sockets;
using System.Net;


//CODE ASSOCIATED WITH A BUTTON 
        private void button_SearchAgain_Click(object sender, EventArgs e)
        {
            byte[] data = new byte[1024];
            string input, stringData;

            IPEndPoint ipep = new IPEndPoint(IPAddress.Broadcast, 20034);
            UdpClient udp = new UdpClient();
            Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
            
            string burnR = "NRUBR";
            data = Encoding.ASCII.GetBytes(burnR.ToCharArray());
            //server.SendTo(data, data.Length, SocketFlags.None, ipep);
            udp.Connect(ipep);
            udp.Send(data, data.Length);

            IPEndPoint client = new IPEndPoint(IPAddress.Any, 20034);
            EndPoint Remote = (EndPoint)client;

            byte[] rcvdata = new byte[1024];
            if (udp.Available>0)
            {
                MessageBox.Show("You are here.");
            }
            //int recv = server.ReceiveFrom(rcvdata, ref Remote);

            server.Close();

jwangAimCo wrote:

Unfortunately for you I don't just give up on learning things I don't know. I am still hoping that somebody could lend me a hand. I apologize for not being an elite coder, but then again if I knew how to do this I wouldn't be posting.

private void FindBoards()
{
    ArrayList crArray = new ArrayList();
    byte[] sendData = new byte[1024];
    byte[] rcvData = new byte[1024];


    //Setting up Broadcast and Local Endpoint and socket protocol.
    Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
    s.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1);
    IPEndPoint localEP = new IPEndPoint(IPAddress.Any, 20034);
    IPEndPoint broadcastEP = new IPEndPoint(IPAddress.Broadcast, 20034);

    try
    {
        sendData = "whatever you want to send";
        s.Bind(localEP);
        s.SendTo(sendData, broadcastEP);

        s.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, 2000);
    }
    catch (System.Net.Sockets.SocketException se)
    {
        MessageBox.Show(se.Message);
    }

    //Iterate on the Socket to find data
    try
    {
        int rcvSize;
        int crIndex = 0;
        DateTime rcvTimer = DateTime.Now.AddSeconds(1);
        do
        {
            rcvSize = s.Available;
            if (rcvSize > 0)
            {
                EndPoint local = (EndPoint)localEP;
                int iRX = s.ReceiveFrom(rcvData, 0, 1024, SocketFlags.None, ref local);
            }
        } while ((rcvSize > 0) || (DateTime.Now < rcvTimer));
    }
    catch (System.Net.Sockets.SocketException se)
    {
        MessageBox.Show(se.Message);
    }
    //Close socket
    s.Close();
}