WCF的问题

Question

我在建立一个WCF服务时，遇到个怪问题，我基本是照网上的例子做的，可运行时总报错，请高手指点一下。主要的程序有：
1、接口类：    [ServiceContract]
    public interface IStarServiceInterface
    {
        [OperationContract]
        double MyAdd(double n1, double n2);
    }
2、实现类：   public class StarService : IStarServiceInterface
    {
        public double MyAdd(double n1, double n2)
        {
            return n1 + n2;
        }
    }
3.建立服务的代码：        ServiceHost oServiceHost = new ServiceHost(typeof(StarService));        public MainForm()
        {
            InitializeComponent();            // Open the ServiceHost to create listeners         // and start listening for messages.
            try
            {
                System.ServiceModel.NetTcpBinding oBinding = new NetTcpBinding();
                oBinding.Name = "tcpbinding";
                oBinding.CloseTimeout = new TimeSpan(600);
                oBinding.OpenTimeout = new TimeSpan(600);
                oBinding.ReceiveTimeout = new TimeSpan(600);
                oBinding.SendTimeout = new TimeSpan(600);
                oBinding.TransactionFlow = false;   //是否支持分布式事务
                oBinding.TransferMode = TransferMode.Buffered;
                oBinding.TransactionProtocol = TransactionProtocol.OleTransactions;
                oBinding.HostNameComparisonMode = HostNameComparisonMode.StrongWildcard;
                oBinding.ListenBacklog = 10;
                oBinding.MaxBufferPoolSize = 524288;
                oBinding.MaxBufferSize = 65536;
                oBinding.MaxConnections = 10;
                oBinding.MaxReceivedMessageSize = 65536;
                oBinding.Security.Mode = SecurityMode.None; //不需要证书
                oBinding.Security.Transport.ClientCredentialType = TcpClientCredentialType.Certificate;
                oBinding.ReliableSession.Ordered = true;
                oBinding.ReliableSession.InactivityTimeout = new TimeSpan(6000);
                oBinding.ReliableSession.Enabled = false;                System.Xml.XmlDictionaryReaderQuotas oReaderQuotas = new XmlDictionaryReaderQuotas();
                oReaderQuotas.MaxArrayLength = int.MaxValue;
                oReaderQuotas.MaxStringContentLength = int.MaxValue;
                oReaderQuotas.MaxBytesPerRead = int.MaxValue;                oBinding.ReaderQuotas = oReaderQuotas;                oServiceHost.AddServiceEndpoint(typeof(StarService), oBinding, "net.tcp://localhost:8999/StarService");                oServiceHost.Open();                SystemMessage.AppendText("服务建立成功...\r\n");
            }
            catch (Exception ex)
            {
                SystemMessage.AppendText("无法建立服务...\r\n");
            }
        }
问题是，运行到语句
oServiceHost.AddServiceEndpoint(typeof(StarService), oBinding, "net.tcp://localhost:8999/StarService");
时，总报错，
协定类型 Star.WinFormServer.StarService 不具有 ServiceContractAttribute 特性。若要定义有效协定，指定的类型(协定接口或服务类)必须具有 ServiceContractAttribute请问此问题该如何解决。

Answer 1

http://www.cnblogs.com/artech/archive/2007/09/15/893838.html参考

Answer 2

typeof(StarService)改为typeof(IStarServiceInterface)

Answer 3

回复楼上的，改了不行，报错：
ServiceHost 仅支持类服务类型。

Answer 4

oServiceHost.AddServiceEndpoint(typeof(StarService),  
这个地方改不是让你改这里  ServiceHost oServiceHost = new ServiceHost(typeof(StarService));

Answer 5

多谢楼上的，这样改的话，服务的确建立了。但又有了新的问题，客户端调用时报错：
打开操作没有在分配的超时 00:00:00.0600000 内完成。分配给此操作的时间可能已经是更长超时的一部分。客户端的代码如下：
1、接口：   [ServiceContract]
    public interface ServiceInterface
    {
        [OperationContract]
        double MyAdd(double n1, double n2);
    }
2、建立频道：private ServiceInterface ssProxy;
....
      private void ResetProxy()
        {
            NetTcpBinding oBinding = new NetTcpBinding();
            oBinding.Name = "tcpbinding";
            oBinding.CloseTimeout = new TimeSpan(600000);
            oBinding.OpenTimeout = new TimeSpan(600000);
            oBinding.ReceiveTimeout = new TimeSpan(600000);
            oBinding.SendTimeout = new TimeSpan(600000);
            oBinding.TransactionFlow = false;   //是否支持分布式事务
            oBinding.TransferMode = TransferMode.Buffered;
            oBinding.TransactionProtocol = TransactionProtocol.OleTransactions;
            oBinding.HostNameComparisonMode = HostNameComparisonMode.StrongWildcard;
            oBinding.ListenBacklog = 10;
            oBinding.MaxBufferPoolSize = 524288;
            oBinding.MaxBufferSize = 2147483647;
            oBinding.MaxConnections = 10;
            oBinding.MaxReceivedMessageSize = 2147483647;
            oBinding.Security.Mode = SecurityMode.None; //不需要证书
            oBinding.Security.Transport.ClientCredentialType = TcpClientCredentialType.Certificate;
            oBinding.ReliableSession.Ordered = true;
            oBinding.ReliableSession.InactivityTimeout = new TimeSpan(6000);
            oBinding.ReliableSession.Enabled = false;            System.Xml.XmlDictionaryReaderQuotas oReaderQuotas = new XmlDictionaryReaderQuotas();
            oReaderQuotas.MaxArrayLength = int.MaxValue;
            oReaderQuotas.MaxStringContentLength = int.MaxValue;
            oReaderQuotas.MaxBytesPerRead = int.MaxValue;            oBinding.ReaderQuotas = oReaderQuotas;            ServiceEndpoint nettcpEndpoint = new ServiceEndpoint(ContractDescription.GetContract(typeof(ServiceInterface)), oBinding, new EndpointAddress("net.tcp://localhost:8999/StarService"));
            ChannelFactory<ServiceInterface> factory = new ChannelFactory<ServiceInterface>(nettcpEndpoint);
            ssProxy = factory.CreateChannel();
        }这是成功的，没什么问题，3、调用时报以上错误，代码如下：textBox3.Text = ssProxy.MyAdd(Convert.ToDouble(textBox1.Text), Convert.ToDouble(textBox2.Text)).ToString();
请高手们再指点一下。

Answer 6

oServiceHost  要 Open(); 才算真正运行。