0

我有一个托管在 Windows 服务上的 wcf 服务。WinForm 和 aspnet 站点从该服务中获取信息。我创建了 Uwp 应用程序并将其连接到相同的服务。Uwp 可以向服务发送请求并接收返回的数据。问题是当服务使用回调将数据推送到客户端时。当服务向应用广播时，应用什么也得不到。下次服务尝试广播或客户端尝试发送请求时，频道已损坏。客户端没有异常，只是没有收到响应。服务获得：

Cannot access a disposed object.

对象名称：“System.ServiceModel.Channels.ServiceChannel”。

没有内在的例外。堆栈是：

Server stack trace:

在 System.ServiceModel.Channels.CommunicationObject.ThrowIfDisposedOrNotOpen() 在 System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout) 在 System.ServiceModel。 Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation) at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

在 [0] 处重新抛出异常：

主机配置：

<system.serviceModel>
<services>
  <!-- This section is optional with the new configuration model  
       introduced in .NET Framework 4. -->

  <service behaviorConfiguration="ServiceBehavior"
  name="TL.TrayNotify.WcfService.WcfService">
    <host>
      <baseAddresses>
        <add baseAddress="net.tcp://server:8089/TeamCity"/>
      </baseAddresses>
    </host>
    <endpoint address="net.tcp://server:8089/TeamCityService/TeamCity/tcp" 
              binding="netTcpBinding" contract="TL.TrayNotify.WcfService.IWcfService" 
              bindingConfiguration="tcpBinding">
      <identity>
        <dns value="localhost"/>
      </identity>
    </endpoint>

    <endpoint address="net.tcp://server:8090/Calculator/mex" binding="mexTcpBinding"
     contract="IMetadataExchange"/>
  </service>
</services>
<behaviors>
  <serviceBehaviors>
    <behavior name="ServiceBehavior">
      <serviceMetadata httpGetEnabled="false"/>
      <serviceDebug includeExceptionDetailInFaults="true "/>
    </behavior>
  </serviceBehaviors>
</behaviors>
<bindings>
  <netTcpBinding>
    <binding name="tcpBinding">
      <security mode="None"></security>
      <reliableSession enabled="false" inactivityTimeout="00:20:00" />
    </binding>
  </netTcpBinding>
</bindings>

UWP 连接：

NetTcpBinding tcpBinding = new NetTcpBinding();
tcpBinding.Security.Mode = SecurityMode.None;
tcpBinding.Security.Transport.ClientCredentialType = TcpClientCredentialType.Windows;
tcpBinding.Security.Message.ClientCredentialType = MessageCredentialType.None;
//new client
m_client = new WcfServiceClient(tcpBinding, new EndpointAddress("net.tcp://server:8089/TeamCityService/TeamCity/tcp"));
m_client.ClientCredentials.Windows.ClientCredential.UserName = "user";
m_client.ClientCredentials.Windows.ClientCredential.Password = "password";
//bind call back event
m_client.BroadcastToClientReceived += MyTeamCityClient_ReceiveTeamCityBroadcastReceived;
await m_client.OpenAsync();
await this.m_client.RegisterClientAsync(m_deviceName);

即使服务向该客户端广播，MyTeamCityClient_ReceiveTeamCityBroadcastReceived也永远不会被调用。

4

1 回答 1

0

如果这个http://github.com/klimkina/CSharp/tree/master/UwpCalculator重现了这个问题，我有一个修复应用程序的工作：在 reference.cs 添加以下 ICalculatorCallback 声明后跟第 #157 行，测试应用程序没有问题。

[System.ServiceModel.OperationContractAttribute(IsOneWay = true, Action = "http://tempuri.org/ICalculator/BroadcastToClient")]
void BroadcastToClient(string message);

原因：在 UWP 项目的 reference.cs 文件中ICalculatorCallback，BroadcastToClient(string)虽然BroadcastToClient(string)在ICalculatorCallback名为CalculatorClientCallback.

于 2018-08-30T06:38:33.477 回答