/// <summary>直接對主機傳送網際網路控制訊息通訊協定 (ICMP)</summary>
/// <param name="hostNameOrAddress">System.String，識別 ICMP 回應訊息的目標電腦。指定給這個參數的值可以是主機名稱或 IP 位址的字串表示。</param>
/// <returns>PingResultEventArgs : 回應內容</returns>
/// <remarks>本函示的TTL(Time to Live)預設為64</remarks>
public static PingResultEventArgs Ping(string hostNameOrAddress)
{
PingResultEventArgs arg = null;
using (Ping pingSender = new Ping())
{
PingOptions options = new PingOptions(64, true);
string data = "a".PadLeft(32, 'a');
byte[] buffer = Encoding.ASCII.GetBytes(data);
try
{
PingReply reply = pingSender.Send(hostNameOrAddress, 120, buffer, options);
arg = new PingResultEventArgs(reply);
}
catch (Exception ex)
{
arg = new PingResultEventArgs(ex);
}
}
return(arg);
}
private void PingCallback(object o)
{
if (_Times != 0 && _DoneTimes >= _Times)
{
try
{
if (_PingTimer != null)
{
_PingTimer.Dispose();
}
}
finally { _PingTimer = null; }
return;
}
try
{
Interlocked.Increment(ref _DoneTimes);
using (Ping pingSender = new Ping())
{
PingOptions options = new PingOptions(this.TimeToLive, true);
string data = "a".PadLeft(this.DataLength, 'a');
byte[] buffer = Encoding.ASCII.GetBytes(data);
try
{
PingReply reply = pingSender.Send(this.HostNameOrAddress, this.Timeout, buffer, options);
if (OnResult != null)
{
PingResultEventArgs arg = new PingResultEventArgs(reply);
foreach (EventHandler <PingResultEventArgs> del in this.OnResult.GetInvocationList())
{
try { del.BeginInvoke(this, arg, new AsyncCallback(PingResultCallback), del); }
catch (Exception exx) { Debug.Print(exx.Message); }
}
}
}
catch (Exception ex)
{
if (OnException != null)
{
PingResultEventArgs arg = new PingResultEventArgs(ex);
foreach (EventHandler <PingResultEventArgs> del in this.OnException.GetInvocationList())
{
try { del.BeginInvoke(this, arg, new AsyncCallback(PingResultCallback), del); }
catch (Exception exx) { Debug.Print(exx.Message); }
}
}
}
}
if (_Times != 0 && _DoneTimes >= _Times)
{
if (_PingTimer != null)
{
_PingTimer.Dispose();
_PingTimer = null;
}
if (OnFinished != null)
{
foreach (EventHandler del in this.OnFinished.GetInvocationList())
{
try { del.BeginInvoke(this, new EventArgs(), new AsyncCallback(EventCallback), del); }
catch (Exception exx) { Debug.Print(exx.Message); }
}
}
}
}
catch { }
}