/// <summary>
/// Returns an awaitable task whose result is the current time from the NTP server specified in the constructor.
/// </summary>
/// <remarks>
/// <para>This method may throw exceptions (most likely a <seealso cref="NtpNetworkException"/> if an error occurs trying to connect/bind to the network endpoint. Exception handling in client code is recommended.</para>
/// </remarks>
/// <seealso cref="NtpNetworkException"/>
public System.Threading.Tasks.Task <RequestTimeResult> RequestTimeAsync()
{
var tcs = new System.Threading.Tasks.TaskCompletionSource <RequestTimeResult>();
var client = new NtpClient(_ServerAddress);
var timeReceivedHandler = new EventHandler <NtpTimeReceivedEventArgs>(
(sender, args) =>
{
tcs.SetResult(new RequestTimeResult(args.CurrentTime, args.ReceivedAt));
}
);
var errorOccurredHandler = new EventHandler <NtpNetworkErrorEventArgs>(
(sender, args) =>
{
if (!tcs.Task.IsCanceled && !tcs.Task.IsCompleted)
{
tcs.SetException(args.Exception);
}
}
);
client.TimeReceived += timeReceivedHandler;
client.ErrorOccurred += errorOccurredHandler;
var retVal = tcs.Task;
tcs.Task.ContinueWith(
(pt) =>
{
client.TimeReceived -= timeReceivedHandler;
client.ErrorOccurred -= errorOccurredHandler;
}
);
client.BeginRequestTime();
return(retVal);
}
/// <summary>
/// Returns an awaitable task whose result is the current time from the NTP server specified in the constructor.
/// </summary>
/// <remarks>
/// <para>This method may throw exceptions (most likely a <seealso cref="NtpNetworkException"/> if an error occurs trying to connect/bind to the network endpoint. Exception handling in client code is recommended.</para>
/// </remarks>
/// <seealso cref="NtpNetworkException"/>
public System.Threading.Tasks.Task<DateTime> RequestTimeAsync()
{
var tcs = new System.Threading.Tasks.TaskCompletionSource<DateTime>();
var client = new NtpClient(_ServerAddress);
var timeReceivedHandler = new EventHandler<NtpTimeReceivedEventArgs>(
(sender, args) =>
{
tcs.SetResult(args.CurrentTime);
}
);
var errorOccurredHandler = new EventHandler<NtpNetworkErrorEventArgs>(
(sender, args) =>
{
if (!tcs.Task.IsCanceled && !tcs.Task.IsCompleted)
tcs.SetException(args.Exception);
}
);
client.TimeReceived += timeReceivedHandler;
client.ErrorOccurred += errorOccurredHandler;
var retVal = tcs.Task;
tcs.Task.ContinueWith(
(pt) =>
{
client.TimeReceived -= timeReceivedHandler;
client.ErrorOccurred -= errorOccurredHandler;
}
);
client.BeginRequestTime();
return retVal;
}