记录：Web无引用无配置方式动态调用WCF服务

Posted 2020-09-02 Vis

       这几年一直用WebApi较多，最近项目中有个需求比较适合使用WCF，以前也用过JQuery直接调用Wcf的，但是说实话真的忘了…

       所以这次解决完还是花几分钟记录一下

 

       WCF服务端：宿主在现有Win服务中，在服务启动时添加代码 ，服务代码就不用写了，接口和实现按照契约实现即可

            
 　　        private ServiceHost serviceHost = null; //服务宿主

　　 　　　　 //启动WCF服务
            if (serviceHost != null)
            {
                serviceHost.Close();        
            }
            serviceHost = new ServiceHost(typeof(ControlService));
            serviceHost.Open();
            Toolkit.Log.Warn("WCF服务启动");

 

      服务端ServiceModel配置：个人感觉也是最麻烦的地方，WCF本身支持多种通信方式，所以配置较多，不过基本了解后也差不多

      详细可参考：http://www.cnblogs.com/ingstyle/p/5711249.html

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.serviceModel>
    <services>
      <!-- This section is optional with the new configuration model
           introduced in .NET Framework 4. -->
      <service name="命名空间+类名"
               behaviorConfiguration="ControlServiceBehavior">
        <host>
          <baseAddresses>
            <add baseAddress="http://localhost:8000/ServiceModel/service.svc"/>
          </baseAddresses>
        </host>
        <!-- this endpoint is exposed at the base address provided by host: http://localhost:8000/ServiceModel/service  -->
        <endpoint address=""
                  binding="wsHttpBinding" 
                  contract="命名空间+接口名" />
        <!-- the mex endpoint is exposed at http://localhost:8000/ServiceModel/service/mex -->
        <endpoint address="mex"
                  binding="mexHttpBinding"
                  contract="IMetadataExchange" />
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="ControlServiceBehavior">
          <serviceMetadata httpGetEnabled="true"/>
          <serviceDebug includeExceptionDetailInFaults="False"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>
</configuration>

 

 启动完后可访问：http://localhost:8000/ServiceModel/service.svc 查看如下图：

 

   客户端WCF服务调用封装：

public class WCFHelper
{
    public WCFHelper()
    {

    }

    public static object ExecuteMethod<T>(Binding bind, string pUrl, string pMethodName, params object[] pParams)
    {
        EndpointAddress address = new EndpointAddress(pUrl);
        Binding bindinginstance = null;
        bindinginstance = bind;
        using (ChannelFactory<T> channel = new ChannelFactory<T>(bindinginstance, address))
        {
            T instance = channel.CreateChannel();
            using (instance as IDisposable)
            {
                try
                {
                    Type type = typeof(T);
                    MethodInfo mi = type.GetMethod(pMethodName);
                    return mi.Invoke(instance, pParams);
                }
                catch (TimeoutException)
                {
                    (instance as ICommunicationObject).Abort();
                    throw;
                }
                catch (CommunicationException)
                {
                    (instance as ICommunicationObject).Abort();
                    throw;
                }
                catch (Exception vErr)
                {
                    (instance as ICommunicationObject).Abort();
                    throw;
                }
            }
        }
    }
}

 

由于是动态调用的，所以没有任何配置，可以向下边这样直接使用：

        WSHttpBinding bind = new WSHttpBinding();//重点这儿，可以传递不同的Bind，和对应的服务端配置参数（如果参数和服务端不一致则会报错）
        WCFHelper.ExecuteMethod<IControlService>(bind,"http://localhost:8000/ServiceModel/service.svc", "ResetTerminal", new object[] { "参数" });

注意第一个参数需根据对应的WCF服务端配置对应

例如服务端是webHttpBinding，这儿也换成webHttpBinding bind=new webHttpBinding() 即可，这里我使用的WSHttpBinding

如果有想了解JQuery调用WCF的方式请参考站长的博客：http://www.cnblogs.com/dudu/archive/2009/07/14/1523082.html

 

注意：如果碰到 "响应消息的内容类型 text/html; charset=utf-8 与绑定(text/xml; charset=utf-8)的内容类型不匹配。" 

也有可能是Bind的方式不匹配，另外Host里的地址尽量用IP地址来绑定

 

"响应消息的内容类型 text/html; charset=utf-8 与绑定(text/xml; charset=utf-8)的内容类型不匹配。"问题的解决办法