从 .NET 客户端连接到 WCF 服务时出错

Question

我使用 VS 2010 中的默认模板创建了一个新的 WCF 项目。

然后，我创建了一个控制台应用程序作为连接到 WCF 服务的客户端。

这是我用来连接到服务的代码：

ServiceReference1.Service1Client client = new ServiceReference1.Service1Client();

CompositeType ctype = client.GetDataUsingDataContract(new CompositeType());

当代码到达尝试调用方法 GetDataUsingDataContract() 的位置时，我收到以下异常：

 Error creating the Web Proxy specified in the 'system.net/defaultProxy' configuration section.

Server stack trace: 
   at System.Net.Configuration.DefaultProxySectionInternal.GetSection()
   at System.Net.WebRequest.get_InternalDefaultWebProxy()
   at System.Net.HttpWebRequest..ctor(Uri uri, ServicePoint servicePoint)
   at System.Net.HttpRequestCreator.Create(Uri Uri)
   at System.Net.WebRequest.Create(Uri requestUri, Boolean useUriBase)
   at System.Net.WebRequest.Create(Uri requestUri)
   at System.ServiceModel.Channels.HttpChannelFactory.GetWebRequest(EndpointAddress to, Uri via, NetworkCredential credential, TokenImpersonationLevel impersonationLevel, AuthenticationLevel authenticationLevel, SecurityTokenProviderContainer proxyTokenProvider, SecurityTokenContainer clientCertificateToken, TimeSpan timeout)
   at System.ServiceModel.Channels.HttpChannelFactory.GetWebRequest(EndpointAddress to, Uri via, SecurityTokenProviderContainer tokenProvider, SecurityTokenProviderContainer proxyTokenProvider, SecurityTokenContainer clientCertificateToken, TimeSpan timeout)
   at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.GetWebRequest(EndpointAddress to, Uri via, SecurityTokenContainer clientCertificateToken, TimeoutHelper& timeoutHelper)
   at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.GetWebRequest(EndpointAddress to, Uri via, TimeoutHelper& timeoutHelper)
   at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.SendRequest(Message message, TimeSpan timeout)
   at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)
   at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout)
   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 WcfTestClient.ServiceReference1.IService1.GetDataUsingDataContract(CompositeType composite)
   at WcfTestClient.ServiceReference1.Service1Client.GetDataUsingDataContract(CompositeType composite) in H:\My .NET Projects\WcfTest\WcfTestClient\Service References\ServiceReference1\Reference.cs:line 120
   at WcfTestClient.Program.Main(String[] args) in H:\My .NET Projects\WcfTest\WcfTestClient\Program.cs:line 15
   at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
   at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
   at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

客户端 app.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <system.serviceModel>
        <bindings>
            <basicHttpBinding>
                <binding name="BasicHttpBinding_IService1" closeTimeout="00:01:00"
                    openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
                    allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
                    maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
                    messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"
                    useDefaultWebProxy="false">
                    <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
                        maxBytesPerRead="4096" maxNameTableCharCount="16384" />
                    <security mode="None">
                        <transport clientCredentialType="None" proxyCredentialType="None"
                            realm="" />
                        <message clientCredentialType="UserName" algorithmSuite="Default" />
                    </security>
                </binding>
            </basicHttpBinding>
        </bindings>
        <client>
            <endpoint address="http://localhost:61704/Service1.svc" binding="basicHttpBinding"
                bindingConfiguration="BasicHttpBinding_IService1" contract="ServiceReference1.IService1"
                name="BasicHttpBinding_IService1" />
        </client>
    </system.serviceModel>
</configuration>

我知道服务和客户端没有任何问题因为我将它复制到另一台机器上，它连接起来，调用该方法，并返回结果，没有任何问题。

我的本地计算机上是否有某些设置阻止我连接到此服务？

请帮忙！！！

谢谢

Answer 1

好吧，阅读错误消息：

创建 Web 代理时出错
中指定的
'system.net/defaultProxy'
配置部分。

那么 - 您能否向我们展示 web.config 中 / 中定义的值？这很可能有什么可疑之处......

Answer 2

该服务托管在哪里，例如它是否在 IIS 中的另一台计算机上运行？该服务是否由 Visual Studio 的开发 Web 服务器 Casini 托管运行？

如果它由 IIS 托管，客户端上的浏览器是否可以从服务器查看 .svc 文件并显示“很高兴您已创建服务消息”？

Answer 3

尝试使用服务跟踪查看器来查找您的问题所在。

一旦生成日志并将其加载到查看器中，您就会很快发现问题。问题可能是任何问题，从不可靠的配置到数据对象未正确序列化，再到 WCF 代码中引发的异常。