/// <summary>
/// 取消所有挂起的发送 Internet 控制消息协议 (ICMP) 回送消息并接收相应 ICMP 回送答复消息的异步请求。
/// </summary>
public void SendAsyncCancel()
{
lock (this)
{
m_Ping.SendAsyncCancel();
}
}
private void GeneratePing()
{
try
{
// Set options for transmission:
// The data can go through 64 gateways or routers
// before it is destroyed, and the data packet
// cannot be fragmented.
PingOptions options = new PingOptions(64, true);
// Send the ping asynchronously.
// Use the waiter as the user token.
// When the callback completes, it can wake up this thread.
pingSender.SendAsyncCancel();
pingSender.SendAsync(ipAddress, pingFrequency, pingBuffer, options);
}
catch (Exception ex)
{
Logger.Instance.LogMessage(TracingLevel.ERROR, $"GeneratePing failed: {ex}");
pingCanceled = true;
}
}
private void _onPingCompleted(object sender, PingCompletedEventArgs e)
{
System.Net.NetworkInformation.Ping myPing = (Ping)sender;
pingList.Remove(myPing);
UpdateProgressBarInvoke();//更新进度条
if (e.Reply.Status == IPStatus.Success)
{
string ipaddress = e.Reply.Address.ToString();
string ping = string.Format("{0}ms (Ttl:{1} Len:{2})", e.Reply.RoundtripTime.ToString(), e.Reply.Options.Ttl.ToString(), e.Reply.Buffer.Length.ToString());
string mac = GetMacAddress(ipaddress);
string updateTime = this.GetDateTime();
onlineIPList.Add(ipaddress);//添加到在线IP列表
AddGridItemInvoke(skinDataGridView1, new IPAddressGridItem(ipaddress, "", updateTime, mac, "", false, false, "", ping));
}
if (!e.Cancelled)
{
myPing.SendAsyncCancel();
}
}
internal void Send()
{
ts.TraceInformation("Ping: Send to {0}", this.Target);
pingSender.SendAsyncCancel();
pingSender.SendAsync(this.Target, (int)this.Timeout, this);
}