private void UpdateIPAddress(IPHostEntry dnsEntry)
{
if (InvokeRequired)
{
Invoke(new UpdateIPAddressDelegate(UpdateIPAddress), dnsEntry);
return;
}
if (dnsEntry.AddressList.Length > 1)
{
ChooseIPForm dlg = new ChooseIPForm();
if (dlg.ShowDialog(this, dnsEntry.AddressList) == DialogResult.OK)
{
_tbHostIp.Text = dlg.SelectedIPAddress.ToString();
}
}
else
{
_tbHostIp.Text = dnsEntry.AddressList[0].ToString();
}
}
private void _btnTrace_Click(object sender, EventArgs e)
{
if (_tracer.Active)
{
_tracer.Stop(false);
return;
}
try
{
IPHostEntry entry = Dns.GetHostEntry(_tbTarget.Text);
if (entry.AddressList.Length > 1)
{
ChooseIPForm dlg = new ChooseIPForm();
if (dlg.ShowDialog(this, entry.AddressList) == DialogResult.OK)
{
_tracer.Target = dlg.SelectedIPAddress;
}
}
else
{
_tracer.Target = entry.AddressList[0];
}
_tracer.Start();
}
catch (SocketException)
{
MessageBox.Show(this, "Cannot resolve host name!", "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
catch
{
MessageBox.Show(this, "Cannot parse host name or IP address!", "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}