小编nah*_*lem的帖子

我正在尝试使用async和await,所以我写了这个简单的代码来感受事物.我正在写一个web api和Post函数调用这个包装的s​​toredprocedure.

        public async Task<bool> AddNotificationEntryStoredProcedure(NotificationEntry NewNotification, String ExternalRefID)
    {
        try
        {
            Connection = new SqlConnection(ConnectionString);
            Connection.Open();

            Command = new SqlCommand("InsertNewMessage", Connection);
            Command.CommandType = CommandType.StoredProcedure;

            Command.Parameters.AddWithValue("@ExternalReferenceID ", ExternalRefID);
            Command.Parameters.AddWithValue("@MessageID", NewNotification.id);
            Command.Parameters.AddWithValue("@Recievers", NewNotification.To);
            Command.Parameters.AddWithValue("@MessageBody", NewNotification.MessageBody);
            Command.Parameters.AddWithValue("@DeliveryType", NewNotification.DelieveryType);
            Command.Parameters.AddWithValue("@Response", NewNotification.Feedback);
            Command.Parameters.AddWithValue("@CreatedOn", DateTime.Now);

            //String TodoDuedate = String.Format("{0:yyyy-MM-dd}", todo.DueDate); // convert date format
            await Command.ExecuteNonQuery(); /*here is where it complains*/

            return true;
        }
        catch (Exception )
        {
            //err.ToString();
           return false;
        }
        finally
        {
            Connection.Close();
        }


    }// end add function

但我得到错误说"不能等待int".我如何解决这个问题,谢谢你的帮助.

我的web api中有一个post方法,它返回一个字符串,我从客户端调用该方法.我如何获得返回的值.

发布方法

    public String Post(Models.SQNotificationDataAccessRepository.NotificationEntry notificationEntry)
    {
        String externalReferenceID = String.Empty;
        if (notificationEntry == null)
        {
            throw new HttpResponseException(HttpStatusCode.BadRequest);
        }

        externalReferenceID= dbTransactionLayer.PopulateEsiTable(notification);

        return externalReferenceID;
    }

客户

        using (var client = new HttpClient())
        {
            client.BaseAddress = new Uri("http://localhost:12819/");
            client.DefaultRequestHeaders.Accept.Clear();
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));


            Notification notification = new Notification()
            {
                id = 102,
                To = new String[] { "jamesBond@yahoo.com", "cmsds@email.com" },
                Title = "Notification WebService Client Test",
                MessageBody = "The message body will go there",
                DelieveryType = "Email",
                Response = true
            };



            HttpResponseMessage …