Testing Broadcasting and receiving messages
- by Avik
Guys am having some difficulty figuring this out:
I am trying to test whether the code(in c#) to broadcast a message and receiving the message works:
The code to send the datagram(in this case its the hostname) is:
public partial class Form1 : Form
{
String hostName;
byte[] hostBuffer = new byte[1024];
public Form1()
{
InitializeComponent();
StartNotification();
}
public void StartNotification()
{
IPEndPoint notifyIP = new IPEndPoint(IPAddress.Broadcast, 6000);
hostName = Dns.GetHostName();
hostBuffer = Encoding.ASCII.GetBytes(hostName);
UdpClient newUdpClient = new UdpClient();
newUdpClient.Send(hostBuffer, hostBuffer.Length, notifyIP);
}
}
And the code to receive the datagram is:
public partial class Form1 : Form
{
byte[] receivedNotification = new byte[1024];
String notificationReceived;
StringBuilder listBox;
UdpClient udpServer;
IPEndPoint remoteEndPoint;
public Form1()
{
InitializeComponent();
udpServer = new UdpClient(new IPEndPoint(IPAddress.Any, 1234));
remoteEndPoint=null;
startUdpListener1();
}
public void startUdpListener1()
{
receivedNotification = udpServer.Receive(ref remoteEndPoint);
notificationReceived = Encoding.ASCII.GetString(receivedNotification);
listBox = new StringBuilder(this.listBox1.Text);
listBox.AppendLine(notificationReceived);
this.listBox1.Items.Add(listBox.ToString());
}
}
For the reception of the code I have a form that has only a listbox(listBox1).
The problem here is that when i execute the code to receive, the program runs but the form isnt visible.
However when I comment the function call( startUdpListener1() ), the purpose isnt served but the form is visible.
Whats going wrong?
