Question

请帮帮我!!!

我正在尝试构建一个使用回调契约的应用程序。我的应用程序在同一台机器上正常运行客户端和服务器，但是当我尝试从其他机器访问该服务时，我得到了异常超时（操作din在分配的超时内没有完成。。客户端读取一些值从服务器上的数据库中抛出服务。我不知道我的错误在哪里。我试图将客户端放在虚拟机中，并且服务（和数据库）在真机上。

这是我的服务器配置文件：

            <binding name="TrainService" closeTimeout="00:02:00" openTimeout="00:02:00"
                receiveTimeout="00:10:00" sendTimeout="00:02:00" bypassProxyOnLocal="false"
                transactionFlow="false" hostNameComparisonMode="StrongWildcard"
                maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
                messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true">
                <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
                    maxBytesPerRead="4096" maxNameTableCharCount="16384" />
                <reliableSession ordered="true" inactivityTimeout="00:10:00" />
                <security mode="None">
                    <message clientCredentialType="None" negotiateServiceCredential="true"
                        algorithmSuite="Default" />
                </security>
            </binding>
        </wsDualHttpBinding>
        <wsHttpBinding>
            <binding name="WSHttpBinding_ITrainService" closeTimeout="00:02:00"
                openTimeout="00:02:00" receiveTimeout="00:10:00" sendTimeout="00:02:00"
                bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard"
                maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
                messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true"
                allowCookies="false">
                <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
                    maxBytesPerRead="4096" maxNameTableCharCount="16384" />
                <reliableSession ordered="true" inactivityTimeout="00:10:00"
                    enabled="false" />
                <security mode="None">
                    <transport clientCredentialType="None" proxyCredentialType="None"
                        realm="" />
                    <message clientCredentialType="None" negotiateServiceCredential="true"
                        algorithmSuite="Default" />
                </security>
            </binding>
        </wsHttpBinding>
    </bindings>
  <client>
    <endpoint address="http://localhost:8732/Design_Time_Addresses/WCFandEFService/TrainService/"
      binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_ITrainService"
      contract="TrainServiceRef.ITrainService" name="WSHttpBinding_ITrainService">
      <identity>
        <dns value="localhost" />
      </identity>
    </endpoint>
    <endpoint address="net.tcp://localhost:8080/TcpService" binding="netTcpBinding"
      contract="TrainServiceRef.ITrainService" name="NetTcpBinding_ITrainService" />
    <endpoint address="http://localhost:8082/InterlockingService/Host/line"
      binding="wsDualHttpBinding" bindingConfiguration="LineService"
      contract="InterlockingServiceReference.ILineService" name="LineService">
      <identity>
        <userPrincipalName value="Romina-PC\Romina" />
      </identity>
    </endpoint>

    <endpoint address="http://localhost:8082/InterlockingService/Host/trains"
      binding="wsDualHttpBinding" bindingConfiguration="TrainService"
      contract="InterlockingServiceReference.ITrainService" name="TrainService">
      <identity>
        <userPrincipalName value="Romina-PC\Romina" />
      </identity>
    </endpoint>

  </client>

</system.serviceModel>

我的客户端配置文件：

- ＆GT;

            <binding name="TrainService" closeTimeout="00:01:00" openTimeout="00:01:00"
                receiveTimeout="00:10:00" sendTimeout="00:01:00" bypassProxyOnLocal="false"
                transactionFlow="false" hostNameComparisonMode="StrongWildcard"
                maxBufferPoolSize="52428800" maxReceivedMessageSize="6553600"
                messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true">
                <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="1638400"
                    maxBytesPerRead="4096" maxNameTableCharCount="1638400" />
                <reliableSession ordered="true" inactivityTimeout="00:10:00" />
                <security mode="None">
                    <!--<message clientCredentialType="None" negotiateServiceCredential="true"
                        algorithmSuite="Default" />-->
                </security>
            </binding>
        </wsDualHttpBinding>
    </bindings>
    <client>
        <endpoint address="http://localhost:8082/InterlockingService/Host/line"
            binding="wsDualHttpBinding" bindingConfiguration="LineService"
            contract="InterlockingServiceRef.ILineService" name="LineService">
            <identity>
                <userPrincipalName value="Romina-PC\Romina" />
            </identity>
        </endpoint>

        <endpoint address="http://localhost:8082/InterlockingService/Host/trains"
            binding="wsDualHttpBinding" bindingConfiguration="TrainService"
            contract="InterlockingServiceRef.ITrainService" name="TrainService">
            <identity>
                <userPrincipalName value="Romina-PC\Romina" />
            </identity>
        </endpoint>
    </client>
</system.serviceModel>

谢谢。

这些是合同：公共接口ITrainServiceCallBack { [OperationContract（IsOneWay = true）] void OnTrainChangeState（TrainData train）; }

//[ServiceContract(Name = "LineService", CallbackContract = typeof(ILineServiceCallBack))]
[ServiceContract(CallbackContract = typeof(ITrainServiceCallBack))]
public interface ITrainService
{
    [OperationContract]
    TrainData GetTrainData(string trainName);

    [OperationContract]
    bool ChangeTrainState_bool(ref TrainData train);

    [OperationContract]
    void ChangeTrainState(ref Trains_Detail train);
    [OperationContract]
    bool SubscribeToTrainChangeEvent();

    [OperationContract]
    bool UnSubscribeFromTrainChangeEvent();
    [OperationContract]
    TrainData TranslateTrainEntityToTrainData(Trains_Detail trainEntity);

    [OperationContract]
    IEnumerable<Trains_Detail> GetTrains();

    [OperationContract]
    IEnumerable<Trains_Detail> GetTrains_ByStation(int Statie_plecare, int Statie_sosire);
}

方法实施：

使用System; 使用System.Collections.Generic; 使用System.Linq; 使用System.Runtime.Serialization; 使用System.ServiceModel; 使用System.Text; 使用System.Data;

命名空间WCFandEFService { //注意：您可以使用“重构”菜单上的“重命名”命令将代码和配置文件中的类名“ProductService”一起更改。 // [ServiceBehavior（ConcurrencyMode = ConcurrencyMode.Multiple）]

public partial class InterlockingService : ITrainService
{

    static List<ITrainServiceCallBack> subscribers_train = new List<ITrainServiceCallBack>();


    public bool TrainExists(string nrTren, InterlockingEntities database)
    {
        // Check to see whether the specified product exists in the database
        int numTrain = (from t in database.Trains_Details
                       where string.Equals(t.Nr_tren, nrTren)
                       select t).Count();

        return numTrain > 0;

    }


    public TrainData TranslateTrainEntityToTrainData(Trains_Detail trainEntity)
    {
        TrainData train = new TrainData();

        train.nrTren=trainEntity.Nr_tren;
        train.ora_Plecare= trainEntity.Ora_plecare;
        train.ora_Sosire=trainEntity.Ora_sosire;
        train.statie_Plecare=trainEntity.Statie_plecare;
        train.statie_Sosire=trainEntity.Statie_sosire;
        train.rang=trainEntity.Rang;
        train.observatii=trainEntity.Observatii;            
        train.RowVersion=trainEntity.RowVersion;

        return train;

    }

    #region ILineService Members



    public IEnumerable<Trains_Detail> GetTrains()
    {
        InterlockingEntities context = new InterlockingEntities();


        IEnumerable<Trains_Detail> result =
                (from t in context.Trains_Details
                 //where l.Station == station
                 select t);
        return result;

    }

     public IEnumerable<Trains_Detail> GetTrains_ByStation(int Statie_plecare,int Statie_sosire)
    {
        InterlockingEntities context = new InterlockingEntities();

        IEnumerable<Trains_Detail> result =
                (from t in context.Trains_Details
                 where t.Statie_plecare==Statie_plecare && t.Statie_sosire==Statie_sosire
                 select t);
        return result;

    }



    public TrainData GetTrainData(string trainNr)
    {
        InterlockingEntities context = new InterlockingEntities();
        Trains_Detail trainInDB =
             (from t
              in context.Trains_Details
              where String.Compare(t.Nr_tren, trainNr) == 0
              select t).FirstOrDefault();
        if (trainInDB == null)
        {

            throw new Exception("No line cu numele " + trainInDB.Nr_tren);

        }

        context.Detach(trainInDB);
        return TranslateTrainEntityToTrainData(trainInDB);
    }

    public bool ChangeTrainState_bool(ref TrainData train)
    {
        InterlockingEntities context = new InterlockingEntities();
        String trainName = train.nrTren;
        //int lineStation = line.station;
        Trains_Detail trainInDB =
             (from t
              in context.Trains_Details
              where String.Compare(t.Nr_tren, trainName) == 0
              select t).FirstOrDefault();

        if (trainInDB == null)
        {
            throw new Exception("No train cu numele " + trainInDB.Nr_tren);
        }

        context.Detach(trainInDB);


        trainInDB.Nr_tren = train.nrTren;
        trainInDB.Ora_plecare=train.ora_Plecare;
        trainInDB.Ora_sosire=train.ora_Sosire;
        trainInDB.Statie_plecare=train.statie_Plecare;
        trainInDB.Statie_sosire=train.statie_Sosire;
        trainInDB.Rang=train.rang;

        trainInDB.RowVersion = train.RowVersion;

        context.Attach(trainInDB);

        context.ObjectStateManager.ChangeObjectState(trainInDB, System.Data.EntityState.Modified);
        context.SaveChanges();
        train.RowVersion = trainInDB.RowVersion;
        context.Dispose();
        raiseTrainChangeState(TranslateTrainEntityToTrainData(trainInDB));
        return true;
    }


    public void ChangeTrainState(ref Trains_Detail train)
    {
        using (var context = new InterlockingEntities())
        {
            context.Attach(train);
            context.ObjectStateManager.ChangeObjectState(train, EntityState.Modified);
            context.SaveChanges();
        }
    }
   }


    public bool SubscribeToTrainChangeEvent()
    {
        try
        {
            ITrainServiceCallBack callback = OperationContext.Current.GetCallbackChannel<ITrainServiceCallBack>();

            if (!subscribers_train.Contains(callback))
            {
                subscribers_train.Add(callback);
            }
            return true;
        }
        catch (Exception)
        {

            return false;
        }


    }

    public bool UnSubscribeFromTrainChangeEvent()
    {
        try
        {
            ITrainServiceCallBack callback = OperationContext.Current.GetCallbackChannel<ITrainServiceCallBack>();
            subscribers_train.Remove(callback);

            return true;
        }
        catch (Exception)
        {
            return false;
        }
    }

    #endregion




    private void raiseTrainChangeState(TrainData train)
    {
        subscribers_train.AsParallel().ForAll(callback =>
        {
            if (((ICommunicationObject)callback).State == CommunicationState.Opened)
            {
                callback.OnTrainChangeState(train);

            }
            else
            {
                subscribers_train.Remove(callback);
            }
        });
    }






}

}

Answer 1

回调合约中的操作合约应标记为IsOneWay = true，并且应返回void - 而不是服务中的所有操作合约。

另外，我在NetTcpBinding上使用双工合约时遇到了类似的问题。我通过在代理上设置OperationTimeout值来解决这个问题（在我的情况下，为5分钟）。我通过在创建频道时将我的频道投射到客户端上的IContextChannel接口来以编程方式设置它。您应该可以在客户端配置文件中执行相同的操作。

我的代码：

((IContextChannel)myChannel).OperationTimeout = new Timespan(0, 5, 0);

Answer 2

客户端和服务器中的端点地址将“localhost”指定为计算机名称。如果他们在不同的机器上，则客户端将无法与该服务通信。尝试将其更改为服务器所在的实际计算机名称。

更新：这是WSDualHttpBinding在合同和回调合同上使用非单向操作的示例。 WSDualHttpBinding 不要求回调契约上的操作是单向的。 PollingDuplexHttpBinding（对于Silverlight）确实如此，但这是另一个故事。

using System;
using System.IO;
using System.Reflection;
using System.ServiceModel;
using System.Threading;

public class StackOverflow_6216605_751090
{
    [ServiceContract(CallbackContract = typeof(ITestCallback))]
    public interface ITest
    {
        [OperationContract]
        int Add(int x, int y);
        [OperationContract]
        void CallMe(int numberOfTimes);
    }
    [ServiceContract]
    public interface ITestCallback
    {
        [OperationContract]
        string Hello(string name);
    }
    [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple)]
    public class Service : ITest
    {
        public int Add(int x, int y)
        {
            Console.WriteLine("In a Request/Reply operation on server: {0} + {1}", x, y);
            return x + y;
        }

        public void CallMe(int numberOfTimes)
        {
            Console.WriteLine("In another request/reply operation on server, which will call the client.");
            ITestCallback callback = OperationContext.Current.GetCallbackChannel<ITestCallback>();
            ThreadPool.QueueUserWorkItem(delegate
            {
                for (int i = 0; i < numberOfTimes; i++)
                {
                    Console.WriteLine("Received from client: {0}", callback.Hello("Server"));
                }
            });
        }
    }
    [CallbackBehavior(ConcurrencyMode = ConcurrencyMode.Multiple)]
    public class ClientCallback : ITestCallback
    {
        static int count = 0;
        public string Hello(string name)
        {
            Console.WriteLine("In a client operation, name = {0}", name);
            return string.Format("[{0}] Hello, {1}", ++count, name);
        }
    }
    static void PrintUsage()
    {
        string programName = Path.GetFileName(Assembly.GetEntryAssembly().CodeBase);
        Console.WriteLine("Usage: {0} <options>", programName);
        Console.WriteLine("Examples:");
        Console.WriteLine("  Starting the server: {0} -server", programName);
        Console.WriteLine("  Starting the client: {0} -client <serverMachineName>", programName);
    }
    public static void Main(string[] args)
    {
        if (args.Length < 1)
        {
            PrintUsage();
            return;
        }

        if (args[0].Equals("-server", StringComparison.OrdinalIgnoreCase))
        {
            string serviceAddress = "http://" + Environment.MachineName + ":8000/Service";
            ServiceHost host = new ServiceHost(typeof(Service), new Uri(serviceAddress));
            host.AddServiceEndpoint(typeof(ITest), new WSDualHttpBinding(WSDualHttpSecurityMode.None), "");
            host.Open();
            Console.WriteLine("Host opened, press ENTER to close");
            Console.ReadLine();
            host.Close();
        }
        else if (args.Length > 1 && args[0].Equals("-client", StringComparison.OrdinalIgnoreCase))
        {
            string serviceAddress = "http://" + args[1] + ":8000/Service";
            ClientCallback clientCallback = new ClientCallback();
            DuplexChannelFactory<ITest> factory = new DuplexChannelFactory<ITest>(
                clientCallback,
                new WSDualHttpBinding(WSDualHttpSecurityMode.None),
                new EndpointAddress(serviceAddress));
            ITest proxy = factory.CreateChannel();
            Console.WriteLine("Simple Request/Reply: {0}", proxy.Add(3, 4));
            Console.WriteLine("Now calling an operation on the server which will cause callbacks");
            proxy.CallMe(10);
            Console.WriteLine("Press ENTER to close");
            Console.ReadLine();
        }
        else
        {
            PrintUsage();
        }
    }
}

Answer 3

检查您是否已将操作合同标记为单向。它通常在双http绑定中超时，人们无法将合同标记为单向。

[OperationContract(IsOneWay = true)]

修改

请将以下行放在服务合同的行为中。

[ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple)]

供我们参考，请考虑发布您的服务合同结构和运营合同的实施。

wcf wsdualhttpbinding超时问题

3 个答案: