在wcf服务中进行数据库更新后，在worker角色中触发tcpListner事件

Question

我正在听我的工作人员，并将其托管在azure云服务中。

当通过wcf服务进行任何数据库事务时，WorkerRole基本上是向连接的设备发送更新

wcf服务在天蓝色网站上托管。

如果通过wcf服务调用（例如方法XYZ）在数据库中进行任何更新，我怎么能触发tcplistner。

工作人员角色代码

private AutoResetEvent connectionWaitHandle = new AutoResetEvent(false);

    public override void Run()
    {
        TcpListener listener = null;

        try
        {
            listener = new TcpListener(
                RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["LiveUpdateEP"].IPEndpoint);
            listener.ExclusiveAddressUse = false;

            listener.Start();   


        }
        catch (SocketException)
        {
            Trace.Write("Echo server could not start.", "Error");
            return;
        }

        while (true)
        {
            IAsyncResult result = listener.BeginAcceptTcpClient(HandleAsyncConnection, listener);
            connectionWaitHandle.WaitOne();
        }


    }


    public override bool OnStart()
    {
        try
        {
            ServicePointManager.DefaultConnectionLimit = 12;
            return base.OnStart();
        }
        catch (Exception)
        {
            return true;
        }
        // Set the maximum number of concurrent connections 

    }


    private void HandleAsyncConnection(IAsyncResult result)
    {
        // Accept connection
        TcpListener listener = (TcpListener)result.AsyncState;
        TcpClient client = listener.EndAcceptTcpClient(result);
        connectionWaitHandle.Set();

        // Accepted connection
        Guid clientId = Guid.NewGuid();
        string Description = "Updated Items list :: ";


        // Setup reader/writer
        var data = new byte[client.ReceiveBufferSize];
        StringBuilder dataString = new StringBuilder();
        StreamWriter writer;



        NetworkStream netStream = client.GetStream();
        writer = new StreamWriter(netStream);

        int readCount;
        readCount = netStream.Read(data, 0, client.ReceiveBufferSize);
        dataString.Append(Encoding.UTF8.GetString(data, 0, readCount));

        try
        {

            JsonSerializer serializer = new JsonSerializer();

            Updates objUpdate = JsonConvert.DeserializeObject<Updates>(dataString.ToString());

            dataString.Clear();
            dataString.Append(" Database WR - " + objUpdate.DBName);
            dataString.Append(" DeviceId WR - " + objUpdate.DeviceId);
            dataString.Append(" Date WR- " + objUpdate.Lud);
        }
        catch (Exception ex)
        {
            dataString.Append(ex.Message);
        }

        EventWaitHandle dbTriggerEvent = new EventWaitHandle(false, EventResetMode.ManualReset,
                                      "DB_Update_Trigger_Event");

        while (client.Connected)
        {
            Thread.Sleep(1000);
            try
            {
                Description = DateTime.Now.ToString();
                writer.AutoFlush = true;
                string dataToWrite = Description + "---" + dataString;


                writer.WriteLine(dataToWrite);
                dbTriggerEvent.WaitOne();


            //    EventWaitHandle dbTriggerEvent1 = new EventWaitHandle(false, EventResetMode.ManualReset,
            //                         "DB_Update_Trigger_Event");
              //  dbTriggerEvent1.Set();
            }
            catch(Exception ex)
            {
                writer.WriteLine(ex.Message);
            }



        }




        // Done!
        client.Close();
    }

Wcf服务方法：

 public WSResponseObject TCP_Test(string Item_Name)
{
    WSResponseObject response = new WSResponseObject();
    try
    {
        Run();
    }
    catch (Exception ex)
    {
        response.IsError = -1;
        response.Data = ex.Message;
    }
    response.Data = "DONE";
    return response;
}
 public void Run()
{
    TcpListener listener = null;
    AutoResetEvent connectionWaitHandle = new AutoResetEvent(false);
    Thread.Sleep(1000);
    try
    {
        IPAddress ipadd = IPAddress.Parse("xxx.xx.xx.xxx");

        int port = 10950;
        IPEndPoint ip = new IPEndPoint(ipadd, port);

        TcpClient client = new TcpClient();
        client.Connect(ip);
        connectionWaitHandle.Set();

        string msg = @"{""DeviceId"" : ""Test Device 11111"",""BranchId"" : ""11"",""DBName"" : ""Test DB2222"",""Lud"" : ""2014-01-15 05:43:43 +0000""}";
        byte[] bytes = Encoding.Default.GetBytes(msg);

        int length = bytes.Length;
        byte[] datalength = new byte[4];
        NetworkStream Streamm = client.GetStream();
        StreamWriter writer = new StreamWriter(Streamm);
        writer.AutoFlush = true;
        writer.WriteLine(msg);


    }
    catch (SocketException ex)
    {

        throw ex;
    }




}