与えられた:私が接続する必要があるいくつかのウェブメソッドを持っているページを持つ
複数のクライアント。Service.asmx
どのクライアントに接続する必要があるかを決定するために入力を受け取るユーティリティ関数。これは私がこれまでに持っているものです:
public static MyServiceSoapClient SoapClientFactory(string clientCode)
{
var binding = new WSHttpBinding(SecurityMode.Message, false);
var remoteAddress = new EndpointAddress(
new Uri(string.Format("http://{0}.mydomain.com/Service.asmx", clientCode)),
new UpnEndpointIdentity("myservice@domain.com"));
return new MyServiceSoapClient(binding, remoteAddress);
}
このメソッドはエラーなしで完了します(注:EndPointIdentityが何であるかわからないので、そこに入力する文字列を思いついただけです...これを別の場所の構成設定に含めるべきかどうかわかりませんか?)
問題:
リモートメソッドを呼び出そうとすると、例外がスローされ、あまり説明的ではありません(A NullReferenceException
)。コードは次のとおりです。
// point to the correct Service.asmx url.
var client = Util.SoapClientFactory(clientCode);
// now make the soap call.
var result = client.GetSomeStuff(someParameter); // throws the exception.
スタックトレース:
System.NullReferenceException: Object reference not set to an instance of an object.
Server stack trace:
at System.ServiceModel.Security.IssuanceTokenProviderBase`1.DoNegotiation(TimeSpan timeout)
at System.ServiceModel.Security.SspiNegotiationTokenProvider.OnOpen(TimeSpan timeout)
at System.ServiceModel.Security.WrapperSecurityCommunicationObject.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Security.CommunicationObjectSecurityTokenProvider.Open(TimeSpan timeout)
at System.ServiceModel.Security.SecurityUtils.OpenTokenProviderIfRequired(SecurityTokenProvider tokenProvider, TimeSpan timeout)
at System.ServiceModel.Security.SymmetricSecurityProtocol.OnOpen(TimeSpan timeout)
at System.ServiceModel.Security.WrapperSecurityCommunicationObject.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.SecurityChannelFactory`1.ClientSecurityChannel`1.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Security.SecuritySessionSecurityTokenProvider.DoOperation(SecuritySessionOperation operation, EndpointAddress target, Uri via, SecurityToken currentToken, TimeSpan timeout)
at System.ServiceModel.Security.SecuritySessionSecurityTokenProvider.GetTokenCore(TimeSpan timeout)
at System.IdentityModel.Selectors.SecurityTokenProvider.GetToken(TimeSpan timeout)
at System.ServiceModel.Security.SecuritySessionClientSettings`1.ClientSecuritySessionChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.CallOpenOnce.System.ServiceModel.Channels.ServiceChannel.ICallOnce.Call(ServiceChannel channel, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.CallOnceManager.CallOnce(TimeSpan timeout, CallOnceManager cascade)
at System.ServiceModel.Channels.ServiceChannel.EnsureOpened(TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
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 ... my function call. (i.e. client.GetSomeStuff(someParameter) )