WCF InvalidOperationException:绑定实例已关联到侦听 URI [英] WCF InvalidOperationException: A binding instance has already been associated to listen URI

问题描述

我是 WCF 的初学者，正在学习 Essential WCF.

I'm a beginner of WCF and I'm studying in Essential WCF.

我在使用 ServiceContract NameSpace 和 Name 时遇到问题.当我运行代码时，我捕获了一个波纹管 InvalidOperationException.但是我看不清楚.

I encountered a problem when using ServiceContract NameSpace and Name. when I run the code, I catch a bellow InvalidOperationException. But I couldn't understand clearly.

绑定实例已经关联到侦听 URI 'http://localhost:8080/NamespaceChange01'.如果两个端点想要共享同一个 ListenUri，它们也必须共享同一个绑定对象实例.两个冲突的端点要么在 AddServiceEndpoint() 调用中指定，要么在配置文件中指定，要么在 AddServiceEndpoint() 和配置的组合中指定.

有人知道如何避免 InvalidOperationException 吗?

Does anyone knows how to avide the InvalidOperationException ?

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

namespace NamespaceChange01
{

    [ServiceContract(Name = "MyServiceName", Namespace = "http://ServiceNamespace")]
    public interface IBurgerMaster
    {
        [return: MessageParameter(Name = "myOutput")]
        [OperationContract(Name = "OperationName", Action = "OperationAction", ReplyAction = "ReplyActionName")]
        double GetStockPrice(string ticker);
    }

    [ServiceBehavior(Namespace = "http://MyService")]
    public class BurgerMaster : IBurgerMaster
    {

        public double GetStockPrice(string ticker)
        {
            return 100.99;
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            ServiceHost host = new ServiceHost(typeof(BurgerMaster));
            host.Open();
            Console.ReadLine();
            host.Close();
        }
    }
}

• app.config

  • app.config

    <?xml version="1.0" encoding="utf-8" ?>
    <configuration>
      <system.serviceModel>
        <services>
          <service name="NamespaceChange01.BurgerMaster" behaviorConfiguration="mexServiceBehavior">
            <host>
              <baseAddresses>
                <add baseAddress="http://localhost:8080/NamespaceChange01"/>
              </baseAddresses>
            </host>
            <endpoint name="basic" binding="basicHttpBinding" contract="NamespaceChange01.IBurgerMaster"/>
            <endpoint name="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
          </service>
        </services>
        <behaviors>
          <serviceBehaviors>
            <behavior name="mexServiceBehavior">
              <serviceMetadata httpGetEnabled="true"/>
            </behavior>
          </serviceBehaviors>
        </behaviors>
      </system.serviceModel>
    </configuration>
    

  谢谢.

  推荐答案

  两个端点(basic 和 mex)不能在同一个地址上.为其中一个(或两个)添加一些特定地址.

  Two endpoints (basic and mex) couldn't be on the same address. Add some specific address for one of them (or for both ones).

  例如:

  <endpoint name="mex" address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
  

  这篇关于WCF InvalidOperationException:绑定实例已关联到侦听 URI的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！