Question

I want to convert a byte into Boolean. This is the code:

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 want to convert this line of code into a Boolean:

  udpc.Receive(ref ep);

Answer 1

You don’t want to just compare the result with null at all… that way you would lose the actual data, and then call Receive again, effectively skipping the packet.

You should use:

byte[] data = udpc.Receive(ref ep);
if (data == null)
{
    // Whatever
}
else
{
    MessageBox.Show(Encoding.ASCII.GetBytes(data));
}

Also note that this code is broken:

string name = "Connected";
if (name == "") break;

How can name possibly be an empty string when you’ve just set it to "Connected"?