當我嘗試使用web服務時,出現以下異常。我的主要問題是什麼時候發生這種異常?在服務器或客戶端?錯誤在哪裏?服務器是否會針對各種各樣的故障而拋出這個問題?WCF無法用於通信,因爲它處於故障狀態
我做我自己的一些變化,似乎工作
它實際上現在的作品。我刪除了使用並在服務客戶端添加了som清理。
if (Service != null && Service.State != CommunicationState.Faulted)
{
success = true;
Service.Close();
}
}
catch (Exception ex)
{
msg = "Error" + Environment.NewLine + ex.Message + Environment.NewLine + ex.StackTrace;
}
finally{
if (!success)
{
if (Service != null) Service.Abort();
}
}
這是個例外:
The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communication because it is in the Faulted state.
Server stack trace:
at System.ServiceModel.Channels.CommunicationObject.Close(TimeSpan timeout)
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 System.ServiceModel.ICommunicationObject.Close(TimeSpan timeout)
at System.ServiceModel.ClientBase`1.System.ServiceModel.ICommunicationObject.Close(TimeSpan timeout)
at System.ServiceModel.ClientBase`1.Close()
at System.ServiceModel.ClientBase`1.System.IDisposable.Dispose()
at bNet.Services.Customers.Cres.Helios.ServiceForm.Send(ServiceFormAction task) in C:\bNetProjects\bNet Web Tools\Solution root\bNet.Services\Customers\Cres\Helios\ServiceForm.cs:line 99
at bNet.Web.Sites.Public.Customers.Cres.ServiceSkjema.Units.Page.ServiceFormControl.SubmitFormClick(Object sender, EventArgs e) in C:\bNetProjects\bNet Web Tools\Solution root\bNet.Web.Sites.Public\Customers\Cres\ServiceSkjema\Units\Page\ServiceFormControl.ascx.cs:line 192
at System.Web.UI.WebControls.Button.OnClick(EventArgs e)
at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)
at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
異常調用堆棧實際上告訴你很多事情,你必須注意。例如,Dispose調用Close。因此,如果代理服務器已處於Faulted狀態,則只能調用Abort,而不是Close或Dispose。幸運的是你找到了必要的改變。微軟事實上有一篇很好的文章,強調推薦使用什麼樣的調用模式,http://msdn.microsoft.com/en-us/library/aa355056.aspx – 2012-02-23 08:40:34
請看這裏以及http:// stackoverflow。 com/questions/2763592/the-communication-object-system-servicemodel-channels-servicechannel-can not be – 2014-02-26 15:26:08
也正是這個異常不是因爲異常處理,而是爲了試圖返回沒有'TableName'的'DataTable'。請參閱http://stackoverflow.com/questions/12702/returning-datatables-in-wcf-net – 2016-01-14 09:13:55