C# 使用Xamarin表单中的WCF服务

我希望通过基于的Xamarin表单连接到WCF服务（在Windows PC上运行）。 我成功地找到并创建了指向WCF的已连接服务。我遵循了我之前在UWP环境中使用的相同方法

但是，一旦我调用服务中公开的任何方法，我就会在Android环境中得到这个异常。

未执行该方法或操作

我不使用PCL，而是使用.net方式

下面是异常的堆栈跟踪

  at System.ServiceModel.Channels.BindingContext.BuildInnerChannelFactory[TChannel] () [0x00007] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/System.ServiceModel/System.ServiceModel.Channels/BindingContext.cs:149 
  at System.ServiceModel.Channels.BindingElement.BuildChannelFactory[TChannel] (System.ServiceModel.Channels.BindingContext context) [0x0000e] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/System.ServiceModel/System.ServiceModel.Channels/BindingElement.cs:52 
  at System.ServiceModel.Channels.BinaryMessageEncodingBindingElement.BuildChannelFactory[TChannel] (System.ServiceModel.Channels.BindingContext context) [0x0000e] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/System.ServiceModel/System.ServiceModel.Channels/BinaryMessageEncodingBindingElement.cs:94 
  at System.ServiceModel.Channels.BindingContext.BuildInnerChannelFactory[TChannel] () [0x00007] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/System.ServiceModel/System.ServiceModel.Channels/BindingContext.cs:149 
  at System.ServiceModel.Channels.Binding.BuildChannelFactory[TChannel] (System.ServiceModel.Channels.BindingParameterCollection parameters) [0x0000e] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/System.ServiceModel/System.ServiceModel.Channels/Binding.cs:133 
  at System.ServiceModel.ChannelFactory.CreateFactory () [0x000be] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/System.ServiceModel/System.ServiceModel/ChannelFactory.cs:202 
  at System.ServiceModel.ChannelFactory.OnOpening () [0x00006] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/System.ServiceModel/System.ServiceModel/ChannelFactory.cs:383 
  at System.ServiceModel.Channels.CommunicationObject.ProcessOpening () [0x00017] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/System.ServiceModel/System.ServiceModel.Channels/CommunicationObject.cs:276 
  at System.ServiceModel.Channels.CommunicationObject.Open (System.TimeSpan timeout) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/System.ServiceModel/System.ServiceModel.Channels/CommunicationObject.cs:169 
  at System.ServiceModel.Channels.CommunicationObject.Open () [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/System.ServiceModel/System.ServiceModel.Channels/CommunicationObject.cs:164 
  at System.ServiceModel.ChannelFactory.EnsureOpened () [0x0004c] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/System.ServiceModel/System.ServiceModel/ChannelFactory.cs:297 
  at System.ServiceModel.ChannelFactory`1[TChannel].CreateChannel () [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/System.ServiceModel/System.ServiceModel/ChannelFactory_1.cs:108 
  at System.ServiceModel.DuplexClientBase`1[TChannel].CreateChannel () [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/System.ServiceModel/System.ServiceModel/DuplexClientBase.cs:123 
  at System.ServiceModel.ClientBase`1[TChannel].get_InnerChannel () [0x00008] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/System.ServiceModel/System.ServiceModel/ClientBase.cs:186 
  at System.ServiceModel.ClientBase`1[TChannel].get_Channel () [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/System.ServiceModel/System.ServiceModel/ClientBase.cs:192 
  at AppMobileService.AppMobileCommandHandlerClientBase.SubscribeAsync (System.String name, AppMobileService.AppMobileConnectionType connectionType) [0x00001] in C:\Users\adm\Desktop\AppMobilePortable\AppMobilePortable\AppMobilePortable\Connected Services\AppMobileService\Reference.cs:945 
  at PortableAppMobile.Services.AppMobileClientService.Connect () [0x00024] in C:\Users\adm\Desktop\AppMobilePortable\AppMobilePortable\AppMobilePortable\Service\AppMobileClientService.cs:136  ```

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如果您不向我们展示您正在使用的实际代码，我们几乎无法为您提供帮助。请先阅读posting@Jason谢谢你的回复。我的问题实际上更为笼统，并指出了这一点的可能性/原则。我不太确定Xamarin.Forms 5是否有限制。@Reza检查文档中的限制。如果可能，请提供更多详细信息。根据官方文件，Xamarin支持WCF。@WendyZang MSFT我提供了捕获异常的更多细节。我希望有帮助。顺便说一句，我使用了与我在UWP中使用的完全相同的代码，并且它正在工作。我不使用PCL方法，这可能是问题吗？在uwp中，您应该能够在PC上测试应用程序，而无需额外配置。测试Android和iOS客户端可能需要本节中的附加步骤。请检查链接。