不知道这样的主机。 (www.kulanwang.com:80)<br/> at System.Net.Http.HttpConnectionPool.ConnectToTcpHostAsync(String host, Int32 port, HttpRequestMessage initialRequest, Boolean async, CancellationToken cancellationToken) at System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken) at System.Net.Http.HttpConnectionPool.CreateHttp11ConnectionAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken) at System.Net.Http.HttpConnectionPool.InjectNewHttp11ConnectionAsync(QueueItem queueItem) at System.Threading.Tasks.TaskCompletionSourceWithCancellation`1.WaitWithCancellationAsync(CancellationToken cancellationToken) at System.Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken) at System.Net.Http.DiagnosticsHandler.SendAsyncCore(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken) at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken) at Microsoft.Extensions.Http.Logging.LoggingHttpMessageHandler.<SendCoreAsync>g__Core|4_0(HttpRequestMessage request, Boolean useAsync, CancellationToken cancellationToken) at Microsoft.Extensions.Http.Logging.LoggingScopeHttpMessageHandler.<SendCoreAsync>g__Core|4_0(HttpRequestMessage request, Boolean useAsync, CancellationToken cancellationToken) at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken) at Oqtane.Services.ServiceBase.PostJsonAsync[TValue,TResult](String uri, TValue value) in D:\MyData\CorePortal\BIWebRazorLib\Services\ServiceBase.cs:line 370 at Oqtane.Services.ServiceBase.PostJsonAsync[T](String uri, T value) at Oqtane.Services.LogService.Log(Alias alias, Nullable`1 pageId, Nullable`1 moduleId, Nullable`1 userId, String category, String feature, LogFunction function, LogLevel level, Exception exception, String message, Object[] args) in D:\MyData\CorePortal\BIWebRazorLib\Services\LogService.cs:line 82 at Oqtane.Modules.ModuleBase.Log(Alias alias, LogLevel level, LogFunction function, Exception exception, String message, Object[] args) in D:\MyData\CorePortal\BIWebRazorLib\Modules\ModuleBase.cs:line 457 at Oqtane.Modules.ModuleBase.Log(Alias alias, LogLevel level, String function, Exception exception, String message, Object[] args) in D:\MyData\CorePortal\BIWebRazorLib\Modules\ModuleBase.cs:line 435 at Oqtane.Modules.ModuleBase.Logger.LogInformation(String message, Object[] args) in D:\MyData\CorePortal\BIWebRazorLib\Modules\ModuleBase.cs:line 501 at VentureSoft.MyFirstModule.ControlBaseClass.BIWebGeneralBase.ProcessServiceReturn(String msg, ApiReturnInfo objReturnInfo) in D:\MyData\CorePortal\BIWebRazorLib\Modules\VentureSoft.MyFirstModule\ControlBaseClass\BIWebControBase.cs:line 1677 at BIWebSectionContent.MyProductSimpleEcBase.GetCityCount() in D:\MyData\CorePortal\BIWebRazorLib\Modules\BIWebSectionContent\ControlBaseClass\ContentControlBaseClass.cs:line 826 at BIWebSectionContent.MyProductSimpleEcBase.OnInitializedAsync() in D:\MyData\CorePortal\BIWebRazorLib\Modules\BIWebSectionContent\ControlBaseClass\ContentControlBaseClass.cs:line 854 at Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync() at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)