private void TaskCallback(CancellationToken token)
{
using (var ping = new Ping())
{
while (!token.IsCancellationRequested)
{
var dateTime = DateTime.Now;
PingReply reply = null;
try
{
reply = ping.Send(Host, (int) Timeout.TotalMilliseconds);
}
catch (Exception ex)
{
if (!token.IsCancellationRequested)
{
var eventArgs = new PingExceptionEventArgs {Exception = ex};
OnPingException(eventArgs);
if (eventArgs.Cancel)
{
return;
}
}
else
{
return;
}
}
if (reply != null)
{
var result = new PingResult
{
DateTime = dateTime,
Status = reply.Status,
TimeCost =
reply.Status == IPStatus.TimedOut
? Timeout
: TimeSpan.FromMilliseconds(reply.RoundtripTime)
};
PingResults.Add(result);
OnPintTick(new PingTickEventArgs {Result = result});
}
while (!token.IsCancellationRequested)
{
var sleep = Interval - (DateTime.Now - dateTime);
var max = TimeSpan.FromMilliseconds(10);
if (sleep > max)
{
sleep = max;
}
if (sleep > TimeSpan.Zero)
{
Thread.Sleep(sleep);
}
else
{
break;
}
}
}
}
}
protected virtual void OnPingException(PingExceptionEventArgs e)
{
EventHandler<PingExceptionEventArgs> handler = PingException;
if (handler != null) handler(this, e);
}