利用泛型反射在运行时动态创建WCF客户端

如果我们知道WCF服务的url,binding,contractType，我们可以使用下面的代码来创建一个WCF客户端对象：

ChannelFactory<ITaskService>.CreateChannel(new BasicHttpBinding(),new EndpointAddress(url));

但上面的代码里面我们没有办法做到BasicHttpBinding的可配置，此时我们可以使用下面的代码配合App.Config实现Binding信息的可配置：

ChannelFactory<ITaskService>.CreateChannel(new BasicHttpBinding("BasicHttpBinding_TaskService"),new EndpointAddress(url));

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.serviceModel>
    <bindings>
      <basicHttpBinding>
        <binding name="BasicHttpBinding_TaskService" closeTimeout="00:01:00"
                        openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:10:00"
                        allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
                        maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
                        messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"
                        useDefaultWebProxy="true">
          <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
                             maxBytesPerRead="4096" maxNameTableCharCount="16384" />
          <security mode="Transport">
            <transport clientCredentialType="None" proxyCredentialType="None"
                                  realm="" />
          </security>
        </binding>
      </basicHttpBinding>
    </bindings>
  </system.serviceModel>
</configuration>

但以上做法都是静态完成的，我们有没有办法实现动态创建WCF客户端对象呢？

    var service1 = GetWcfClient(url, new BasicHttpBinding(), typeof(ITaskService)) as ITaskService;
    var service2 = GetWcfClient(url, new BasicHttpBinding("BasicHttpBinding_TaskService"), typeof(ITaskService)) as ITaskService;

    public static object GetWcfClient(string url, Binding binding, Type contractType)
    {
        Type channelFactoryGenericType = typeof(ChannelFactory<>).MakeGenericType(new Type[] { contractType });
        MethodInfo method = channelFactoryGenericType.GetMethod("CreateChannel", new Type[] { typeof(Binding), typeof(EndpointAddress) });
        return method.Invoke(null, new Object[] { binding, new EndpointAddress(url) });
    }

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.serviceModel>
    <bindings>
      <basicHttpBinding>
        <binding name="BasicHttpBinding_TaskService" closeTimeout="00:01:00"
                        openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:10:00"
                        allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
                        maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
                        messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"
                        useDefaultWebProxy="true">
          <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
                             maxBytesPerRead="4096" maxNameTableCharCount="16384" />
          <security mode="Transport">
            <transport clientCredentialType="None" proxyCredentialType="None"
                                  realm="" />
          </security>
        </binding>
      </basicHttpBinding>
    </bindings>
  </system.serviceModel>
</configuration>