如何从MVC4 WebAPI异步调用WCF方法

Question

我的代码有点像这样：所以我想异步调用SendSms部分。我该怎么做？我可以简单地使用task.run Async和await吗？

 using Twilio.Mvc;
 using Twilio.TwiML.Mvc;
 using Twilio.TwiML;


public class SmsController : ApiController
{
    [HttpPost]
    public HttpResponseMessage Post([FromBody]SmsRequest smsReq)
    {
            var response = new Twilio.TwiML.TwilioResponse();
            //validation checks..

            try
            {

                -- call to WCF to get the List of sms to be sent 
                if ((txtMessageResponse != null) && (txtMessageResponse.SmsMessageInfo.Count > 0))
                {
                    _smsStagingList = txtMessageResponse.SmsMessageInfo;
                    foreach (TextMessageStaging prepareTextMessageResponse in _smsStagingList)
                    {
                        smsDTO textMessageItems = new smsDTO();
                        textMessageItems.PhoneNumber = prepareTextMessageResponse.PhoneNumber;
                        textMessageItems.SmsMessage = prepareTextMessageResponse.SmsMessageBody;

                        isTxtMessageSent = SendSms(textMessageItems);

                        //If the messages were sent then no need to set the flag to be updated 
                        if (isTxtMessageSent)
                        {
                            txtMessageStatusToBeUpdated = false;
                        }
                    }
                    return Request.CreateResponse(HttpStatusCode.OK, twilioResponse.Element);
                }
                else
                {
                    //send error response
                }
            catch (Exception msgProcessingError)
            {
              //send error response again as processing error
            }
            finally
            {
             //set the outbound flag in the table
            }
     }


    private bool SendSms(smsDTO textMessageItems)
    {
        bool isTxtMessageSent = false;
        PushMessageRequest txtMessageRequest = new PushMessageRequest();
        PushMessageResponse txtMessageResponse = null;
        txtMessageRequest.SmsMessageInfo = new SendTextMessage(); //instantiate the dto

        txtMessageRequest.SmsMessageInfo.ToPhone = textMessageItems.PhoneNumber;
        txtMessageRequest.SmsMessageInfo.TextMessage = textMessageItems.SmsMessage;
        try
        {
            using (ITextService textService = ObjectFactory.SendSmsMessage())
            {
                txtMessageResponse = textService.SendSmsMessage(txtMessageRequest);
            }

            isTxtMessageSent = txtMessageResponse.IsSuccessful;
        }
        catch (Exception ex)
        {
            isTxtMessageSent = false;
        }      
        return isTxtMessageSent;
    }          

Answer 1

这里是Twilio福音传道者。

好的，您有一个Web API方法，在该方法中调用一个可能长时间运行的WCF方法。这里有两个问题需要解决：

1. 如何以不阻止Web API方法返回响应的方式调用WCF方法
2. 如何让Twilio等到WCF方法完成