Question

我有一个c＃应用程序从azure获取数据，但是我需要一个dll才能执行此操作，我对异步任务和返回数据有很大的问题。

我的dll代码：

using System;
using System.Text;
using System.Threading.Tasks;
using Microsoft.ServiceBus.Messaging;

namespace ConsoleApp1
{
    public class Program
    {
        private static string connectionString = "XXXX";
        private static string d2cEndpoint = "messages/events";
        private static EventHubClient eventHubClient;

        public async static Task<string> read()
        {
        eventHubClient = EventHubClient.
           CreateFromConnectionString(
              connectionString, d2cEndpoint);

        var d2cPartitions = eventHubClient.GetRuntimeInformation().PartitionIds;

        // wait for data from async task
        string task = await ReceiveMessagesFromDeviceAsync(d2cPartitions[0]);

        // return data from DLL
        return task;
        }

        private async static Task<string> ReceiveMessagesFromDeviceAsync(string partition)
        {
            var eventHubReceiver = eventHubClient.
                  GetDefaultConsumerGroup().
                    CreateReceiver(partition, DateTime.UtcNow);

            EventData eventData = await eventHubReceiver.ReceiveAsync();

            string data = Encoding.UTF8.GetString(eventData.GetBytes());

            return data;
        }
    }
}

问题是从这个dll获取数据 - 没有错误，但也没有数据（我认为无需等待从云端获取数据）

var result = Program.read();

MessageBox.Show(Convert.ToString(result), "Some title", MessageBoxButtons.OK, MessageBoxIcon.Error);
return true;

有什么问题？有什么想法吗？

通过dll获取数据 - 异步任务

0 个答案: