Question

我是这个WCF的新手，我需要让涉及WCF的项目正常工作。所以，我正在通过创建一个非常简单的wcf来测试水，使用NetTcpBinding硬编码ip地址来简化配置，但我无法让它工作。请看一下，看看是否有什么东西会跳到你身上，如果你能指出我做错了什么，我将不胜感激。我有WCFLib，WCFHost和WCFClient。如果一切都在同一台机器上，它很好，花花公子，客户端和主机工作完美，结果是正确的。但是，如果主机在一台计算机上而且同一子网中的另一台客户端没有防火墙（客户端可以成功ping主机）并且我尝试运行客户端，则单击应用程序中的“=”按钮，得到了这个错误：

See the end of this message for details on invoking 
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.ServiceModel.CommunicationObjectFaultedException: The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communication because it is in the Faulted state.

Server stack trace: 
   at System.ServiceModel.Channels.CommunicationObject.ThrowIfDisposedOrNotOpen()
   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 WCFLib.ICalculator.Add(Int32 arg1, Int32 arg2)
   at WCFClient.CalculatorClient.bResult_Click(Object sender, EventArgs e) in c:\Frank\Testing\WCFClient\CalculatorClient.cs:line 37
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


************** Loaded Assemblies **************
mscorlib
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18033 built by: FX45RTMGDR
    CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll
----------------------------------------
WCFClient
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///C:/xxx/WCFClient/bin/Debug/WCFClient.exe
----------------------------------------
System.Windows.Forms
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18037 built by: FX45RTMGDR
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
    Assembly Version: 4.0.0.0

以下是我的WCFClient，WCFHost和WCFLib代码：当主机和客户端在同一台机器上时，代码编译并成功运行。仅当它们位于同一子网上的单独计算机上时才会发生错误，其中一台计算机可以ping另一台计算机。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.ServiceModel;
using WCFLib;

namespace WCFHost
{
    class Program
    {
        static void Main(string[] args)
        {
            ServiceHost host = new ServiceHost(typeof(Calculator));
            host.AddServiceEndpoint(typeof(ICalculator), new NetTcpBinding(), "net.tcp://xxx.xxx.xxx.xxx:9000");
            host.Open();
            Console.ReadLine();
            host.Close();
        }
    }
}
--------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;

namespace WCFLib
{
    // 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(Namespace = "http://www.mywebsite.com/WCFLib")]
    public interface ICalculator
    {
        [OperationContract(Name="AddInt")]
        int Add(int arg1, int arg2);
        [OperationContract(Name = "AddDouble")]
        Double Add(Double arg1, Double arg2);

        [OperationContract]
        CompositeType GetDataUsingDataContract(CompositeType composite);

        // TODO: Add your service operations here
    }

    // Use a data contract as illustrated in the sample below to add composite types to service operations.
    // You can add XSD files into the project. After building the project, you can directly use the data types defined there, with the namespace "WCFLib.ContractType".
    [DataContract]
    public class CompositeType
    {
        bool boolValue = true;
        string stringValue = "Hello ";

        [DataMember]
        public bool BoolValue
        {
            get { return boolValue; }
            set { boolValue = value; }
        }

        [DataMember]
        public string StringValue
        {
            get { return stringValue; }
            set { stringValue = value; }
        }
    }
}
----------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;

namespace WCFLib
{
    // 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 Calculator : ICalculator
    {
        public int Add(int arg1, int arg2)
        {
            return arg1+arg2;
        }
        public Double Add(Double arg1, Double arg2)
        {
            return arg1 + arg2;
        }

        public CompositeType GetDataUsingDataContract(CompositeType composite)
        {
            if (composite == null)
            {
                throw new ArgumentNullException("composite");
            }
            if (composite.BoolValue)
            {
                composite.StringValue += "Suffix";
            }
            return composite;
        }
    }
}
-------------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.ServiceModel;
using WCFLib;

namespace WCFClient
{

    public partial class CalculatorClient : Form
    {
        public ICalculator proxy;
         public CalculatorClient()
        {
            InitializeComponent();
            ChannelFactory<ICalculator> ch;
            ch = new ChannelFactory<ICalculator>(new NetTcpBinding(), "net.tcp://xxx.xxx.xxx.xxx:9000");
            proxy = ch.CreateChannel();

        }

         private void bAdd_Click(object sender, EventArgs e)
         {

         }

         private void bResult_Click(object sender, EventArgs e)
         {
             tboxResult.Text=proxy.Add(12, 45).ToString();
         }


     }
}

Answer 1

尝试在托管和连接时为您的网址添加路径：

例如：“net.tcp：//xxx.xxx.xxx.xxx：9000 / CalcService”

WCF - 通信对象不能用于通信

1 个答案: