Question

public partial class Form1 : Form
{
    private void button1_Click(object sender, EventArgs e)
    {
        String text = textBox1.Text;
        UdpClient udpc = new UdpClient(text,8899);
        IPEndPoint ep = null;

        while (true)
        {
            MessageBox.Show("Name: ");
            string name = "Connected";
            if (name == "") break;
            byte[] sdata = Encoding.ASCII.GetBytes(name);
            udpc.Send(sdata, sdata.Length);

            if (udpc.Receive(ref ep)==null)
            {
               MessageBox.Show("Host not found");               
            }
            else
            {                
                byte[] rdata = udpc.Receive(ref ep);
                string job = Encoding.ASCII.GetString(rdata);
                MessageBox.Show(job);
            }               
        }
    }

I’m getting an error message when my remote machine is not connected . with this code im getting the errror.

if (udpc.Receive(ref ep)==null) 

error message is socket exception was unhanded ( An existing connection was forcibly closed by the remote host)

Answer 1

You can wrap your infinite loop in a try catch block.

try
{
 while(true)
 {
   //your code
 } 
}
catch(Exception exception)
{
   //show exception.Message; 
}
finally{ //clean up}

Look at how it is done.