GetHeader() public méthode

Gets the value of the first ocurrence of the specified header.
public GetHeader ( string name ) : string
name string Name of the header.
Résultat string
        /// <summary>
        /// Write a frame and wait for its receipt frame before returning.
        /// 
        /// This method does not add a receipt header if it is not included already.
        /// If the receipt header is not in the frame headers then it returns after sending the message.
        /// </summary>
        /// <param name="frame"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        public async Task WriteAsync(Frame frame, CancellationToken cancellationToken)
        {
            string receipt = frame.Command == StompCommands.Connect ? _connectReceiptHeader : frame.GetHeader(StompHeaders.Receipt);

            if (receipt == null)
            {
                await _writer.WriteAsync(frame, cancellationToken);
            }
            else
            {
                TaskCompletionSource<object> receiptWaiter = new TaskCompletionSource<object>();
                Task task = receiptWaiter.Task;
                _receiptWaiters[receipt] = receiptWaiter;

                do
                {
                    await _writer.WriteAsync(frame, cancellationToken);
                } while (await Task.WhenAny(task, Task.Delay(_retryInterval, cancellationToken)) != task 
                         && !task.IsFaulted && !task.IsCanceled);

                if (task.IsFaulted) throw task.Exception;
                if (task.IsCanceled) throw new OperationCanceledException(cancellationToken);
            }
        }
        private void OnNext(Frame frame)
        {
            string receiptId = 
                  frame.Command == StompCommands.Receipt ? frame.GetHeader(StompHeaders.ReceiptId)
                : frame.Command == StompCommands.Connected ? _connectReceiptHeader
                : null;

            if(receiptId != null)
            {
                TaskCompletionSource<object> tcs;
                if (_receiptWaiters.TryGetValue(receiptId, out tcs))
                {
                    tcs.TrySetResult(null);
                    _receiptWaiters.TryRemove(receiptId, out tcs);
                }
            }
        }