Exemplo n.º 1
0
        /// <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);
        }
Exemplo n.º 2
0
		/// <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;
		}