protected virtual void OnOnDiscovery(ServiceDiscoveryEventArgs e)
{
if (OnDiscovery != null)
{
var ls = OnDiscovery.GetInvocationList().Cast <EventHandler <ServiceDiscoveryEventArgs> >();//.Where(p => p.Invoke(this, e));
foreach (var ev in ls)
{
ev.Invoke(this, e);
}
}
}
/// <summary>
/// Task to start network discovery. This task should be run indefinitely or for a certain timeframe.
/// A cancellation token can be used to kill the background process.
/// </summary>
/// <param name="token">Cancellation token instance.</param>
public async Task BackgroundQueueDiscovery(CancellationToken token)
{
SendDiscoveryMessage();
UdpClient client = await CreateUdpClientAsync(token);
// Run an infinite retry loop for discovery.
while (true)
{
// With each try, check cancellation token and throw cancellation exception if cancelled.
token.ThrowIfCancellationRequested();
do
{
try
{
UdpReceiveResult result = await client.ReceiveAsync();
string discoveredAddress = result.RemoteEndPoint.Address.ToString();
// Notify all subscribers that a new device has been found on the network.
if (!DiscoveredAddresses.Any(da => da.Equals(discoveredAddress)))
{
DiscoveredAddresses.Add(discoveredAddress);
OnDiscovery?.Invoke(discoveredAddress);
}
}
catch (Exception)
{ }
} while (client.Client != null);
try
{
client.Close();
}
catch (Exception)
{
}
await CreateUdpClientAsync(token);
}
}
protected virtual void OnOnDiscovery(ServiceDiscoveryEventArgs e)
{
//Task.Run(() => OnDiscovery?.Invoke(this, e));
//OnDiscovery?.BeginInvoke(this, e, null, null);
//OnDiscovery?.Invoke(this, e);
if (OnDiscovery != null)
{
//var tasks = OnDiscovery.GetInvocationList().Cast<EventHandler<ServiceDiscoveryEventArgs>>().Select(s => s(this, e));
var ls = OnDiscovery.GetInvocationList().Cast <EventHandler <ServiceDiscoveryEventArgs> >();//.Where(p => p.Invoke(this, e));
foreach (var ev in ls)
{
ev.Invoke(this, e);
}
//await Task.WhenAll(tasks);
}
}
