android - Xamarin WCF 在 Release模式下失败

Question

平台:Xamarin Studio 4

目标手机:Android

我有一个使用 basicHttpBinding 调用 WCF 服务的 Android 应用程序，我一直在使用 Xamarin Studio 4 在 Debug模式下运行得很好。为了在解决此问题时简化事情，我调用了 WCF 的“Hello World”函数。没有输入参数，只有一个字符串输出。

在 Debug模式下，我收到“Hello World”响应。当我将应用程序构建切换为“发布”并再次运行应用程序时，我收到以下错误消息:

System.ServiceModel.EndpointNoFoundException: A system exception has occured. ---> System.Net.WebException: Error: ConnectFailure (No route to host) ---> System.Net.Sockets.SocketExcpetion: No route to host at System.Net.Sockets.Socket.Connect (System.Net.EndPoint remoteEP) [0x00000] in filename unknown: 0

调用 WCF 的代码是:

BasicHttpBinding binding = CreateBasicHttp ();
BTSMobileWcfClient _client = new BTSMobileWcfClient (binding, endPoint);
_client.SayHelloCompleted += ClientOnSayHelloCompleted;
_client.SayHelloAsync();

private static BasicHttpBinding CreateBasicHttp()
        {
            BasicHttpBinding binding = new BasicHttpBinding
            {
                Name = "basicHttpBinding",
                MaxBufferSize = 2147483647,
                MaxReceivedMessageSize = 2147483647
            };
            TimeSpan timeout = new TimeSpan(0, 0, 30);
            binding.SendTimeout = timeout;
            binding.OpenTimeout = timeout;
            binding.ReceiveTimeout = timeout;
            return binding;
        }

private void ClientOnSayHelloCompleted(object sender, SayHelloCompletedEventArgs sayHelloCompletedEventArgs)
        {
            string msg = null;

            if (sayHelloCompletedEventArgs.Error != null)
            {
                msg = sayHelloCompletedEventArgs.Error.ToString();
            }
            else if (sayHelloCompletedEventArgs.Cancelled)
            {
                msg = "Request was cancelled.";
            }
            else
            {
                msg = sayHelloCompletedEventArgs.Result.ToString();
            }
            RunOnUiThread(() =>{
                var lblSignInError = FindViewById<TextView> (Resource.Id.lblSignInError);
                lblSignInError.Text = msg;
            });
        }

BTSMobileWcfClient 是一个 .cs 文件，通过使用工具 SLsvcUtil.exe 针对 Web 服务的 .svc 文件创建。我不确定这是否与此有关，但想记录下来以防万一。

在“ Debug模式”下运行良好但在“ Release模式”下运行失败之前，有没有人有任何建议或见过这个？

谢谢!

Answer 1

我刚刚在项目的发布编译中遇到了同样的问题。在四处闲逛一段时间后，我在 ProjectOptions->AndroidApplication->Required permissions(在 Xamarin studio 中)中设置了互联网权限。它看起来对我有用