我如何在Windows服务中托管WCF服务？

Question

我试图在托管的Windows服务中托管WCF服务。基本上我有1个解决方案CustomersWCFLibrary其中包含3个项目。

1）CustomersWCFLibrary： -

这是我的app.config： -

<?xml version="1.0" encoding="utf-8" ?> 
<configuration> 

    <configSections> 
    </configSections> 
    <connectionStrings> 
    <add name="CustomersWCFLibrary.Properties.Settings.NorthWindConnectionString" 
     connectionString="Data Source=localhost;Initial Catalog=Northwind;Integrated Security=True" 
     providerName="System.Data.SqlClient" /> 
    </connectionStrings> 
    <system.web> 
    <compilation debug="true" /> 
    </system.web> 
    <!-- When deploying the service library project, the content of the config file must be added to the host's 
    app.config file. System.Configuration does not support config files for libraries. --> 
    <system.serviceModel> 

    <services> 
     <service name="CustomersWCFLibrary.CustomersService" behaviorConfiguration="ServiceBehavior"> 
     <endpoint address="net.tcp://localhost:9000/CustomersService" binding="netTcpBinding" contract="CustomersWCFLibrary.ICustomersService"> 
      <identity> 
      <dns value="localhost" /> 
      </identity> 
     </endpoint> 
     <endpoint address="mex" binding="mexTcpBinding" contract="IMetadataExchange" /> 
     <host> 
      <baseAddresses> 
      <add baseAddress="net.tcp://localhost:9001/" /> 
      </baseAddresses> 
     </host> 
     </service> 
    </services> 
    <behaviors> 
     <serviceBehaviors> 
     <behavior name="ServiceBehavior"> 
      <!-- To avoid disclosing metadata information, 
      set the value below to false and remove the metadata endpoint above before deployment --> 
      <serviceMetadata httpGetEnabled="false"/> 
      <!-- To receive exception details in faults for debugging purposes, 
      set the value below to true. Set to false before deployment 
      to avoid disclosing exception information --> 
      <serviceDebug includeExceptionDetailInFaults="False" /> 
     </behavior> 
     </serviceBehaviors> 
    </behaviors> 
    </system.serviceModel> 

</configuration> 

我的类： -

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Runtime.Serialization; 
using System.ServiceModel; 
using System.Text; 
using System.Data; 
using System.Data.SqlClient; 
using System.Collections; 

namespace CustomersWCFLibrary 
{ 
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in both code and config file together. 
    public class CustomersService : ICustomersService 
    { 
     public List<Customers> GetAllCustomers() 
     { 
      List<Customers> customersList = new List<Customers>(); 
      using (SqlConnection objSqlConnection = new SqlConnection(Properties.Settings.Default.NorthWindConnectionString)) 
      { 
       objSqlConnection.Open(); 
       SqlCommand objSqlCommand = new SqlCommand("Select CustomerID, ContactName, ContactTitle,CompanyName,Address from Customers",objSqlConnection); 
       SqlDataReader objSqlDataReader = objSqlCommand.ExecuteReader(); 

       while (objSqlDataReader.Read()) 
       { 
        string customerID = objSqlDataReader.GetString(0); 
        string contactName = objSqlDataReader.GetString(1); 
        string contactTitle = objSqlDataReader.GetString(2); 
        string companyName = objSqlDataReader.GetString(3); 
        string Address = objSqlDataReader.GetString(4); 
        Customers objCustomers = new Customers(); 
        objCustomers.CustomerId = customerID; 
        objCustomers.ContactName = contactName; 
        objCustomers.ContactTitle = contactTitle; 
        objCustomers.CompanyName = companyName; 
        objCustomers.Address = Address; 

        customersList.Add(objCustomers); 
       } 
      } 
      return customersList; 
     } 
    } 
} 

我的合同： -

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Runtime.Serialization; 
using System.ServiceModel; 
using System.Text; 

namespace CustomersWCFLibrary 
{ 
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together. 
    [ServiceContract] 
    public interface ICustomersService 
    { 
     [OperationContract] 
     List<Customers> GetAllCustomers(); 


     // TODO: Add your service operations here 
    } 

    // Use a data contract as illustrated in the sample below to add composite types to service operations 
    [DataContract] 
    public class Customers 
    { 

     [DataMember] 
     public string CustomerId 
     { get; set; } 

     [DataMember] 
     public string ContactName 
     {get; set;} 

     [DataMember] 
     public string ContactTitle 
     {get; set;} 

     [DataMember] 
     public string CompanyName 
     {get; set;} 

     [DataMember] 
     public string Address 
     {get; set;} 


    } 
} 

2）CustomersWindowsService

App.config中： -

<?xml version="1.0" encoding="utf-8"?> 
<configuration> 
    <system.serviceModel> 
     <services> 
      <service name="CustomersWCFLibrary.CustomersService"> 

       <endpoint address="net.tcp://localhost:9000/CustomersService" 
          binding="netTcpBinding" 
        bindingConfiguration="" name="CustomersService_Tcp" contract="CustomersWCFLibrary.ICustomersService" /> 

      </service> 
     </services> 
    </system.serviceModel> 
</configuration> 

这是我的窗口服务的代码： -

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Diagnostics; 
using System.Linq; 
using System.ServiceProcess; 
using System.Text; 
using System.ServiceModel; 

namespace CustomersWindowsService 
{ 
    public partial class CustomersServiceWinService : ServiceBase 
    { 

     private ServiceHost host = null; 

     public CustomersServiceWinService() 
     { 
      InitializeComponent(); 
     } 

     protected override void OnStart(string[] args) 
     { 

       host = new ServiceHost(typeof(CustomersWCFLibrary.CustomersService)); 
       host.Open(); 

     } 

     protected override void OnStop() 
     { 
      host.Close(); 
     } 
    } 
} 

3）我的控制台应用程序WCFCustomersTest

App.Config中： -

<?xml version="1.0" encoding="utf-8"?> 
<configuration> 
    <system.serviceModel> 
     <bindings /> 
     <client> 
      <endpoint address="net.tcp://localhost:9000/CustomersService" 
       binding="netTcpBinding" bindingConfiguration="" contract="CustomersWCFLibrary.ICustomersService" 
       name="CustomersService_Tcp" kind="" endpointConfiguration="" /> 
     </client> 
    </system.serviceModel> 
</configuration> 

Program.cs

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.ServiceModel; 


namespace WCFCustomersTest 
{ 
    class Program 
    { 
     static void Main(string[] args) 
     { 
      var channel = new ChannelFactory<CustomersWCFLibrary.ICustomersService>("CustomersService_Tcp").CreateChannel(); 
      List<CustomersWCFLibrary.Customers> objList = channel.GetAllCustomers(); 
      Console.Write(objList.Count); 
      Console.Read(); 

     } 
    } 
} 

我的控制台应用程序包含对WCFClassLibrary（第一个项目）的引用。 1）如果我不启动我的Windows服务并在VS 2010中运行它，我会得到正确的输出。但是，如果我从VS外部运行我的应用程序，我会得到一个很长的奇怪异常。

2）如果我开始我的Windows服务，我试图从内VS或VS外面跑我的应用我得到这个错误： -

System.ServiceModel.FaultException was unhandled 
    Message=The server was unable to process the request due to an internal error. For more information about the error, either turn on IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from the <serviceDebug> configuration behavior) on the server in order to send the exception information back to the client, or turn on tracing as per the Microsoft .NET Framework 3.0 SDK documentation and inspect the server trace logs. 
    Source=mscorlib 
    Action=http://schemas.microsoft.com/net/2005/12/windowscommunicationfoundation/dispatcher/fault 
    StackTrace: 
    Server stack trace: 
     at System.ServiceModel.Channels.ServiceChannel.ThrowIfFaultUnderstood(Message reply, MessageFault fault, String action, MessageVersion version, FaultConverter faultConverter) 
     at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc) 
     at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout) 
     at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation) 
     at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message) 
    Exception rethrown at [0]: 
     at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) 
     at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) 
     at CustomersWCFLibrary.ICustomersService.GetAllCustomers() 
     at WCFCustomersTest.Program.Main(String[] args) in C:\Users\abc\documents\visual studio 2010\Projects\CustomersWCFLibrary\WCFCustomersTest\Program.cs:line 15 
     at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args) 
     at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) 
     at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() 
     at System.Threading.ThreadHelper.ThreadStart_Context(Object state) 
     at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx) 
     at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) 
     at System.Threading.ThreadHelper.ThreadStart() 
    InnerException: 

我试图解决，已有3个小时没有任何这样的错误成功。

感谢提前:)例外

Answer 1

我建议两件事troubleshoting问题，

1. 启用includeExceptionDetailInFaults，得到的反应更多的细节。
2. 启用WCF跟踪，因为您可能会在跟踪中找到更多详细信息。

如果我能看到有关错误的更多详细信息，我将能够提供更多帮助。你在那里发布的错误是一个通用的错误。

谢谢 Pablo。

Answer 2

屯详情点击这里：< serviceDebug includeExceptionDetailInFaults =“真”/>

或调试未来的管理窗口服务端的请求，看看有什么故障发生的事情。