Question

我尝试以这种方式启动OPC UA服务器：http://documentation.unified-automation.com/uasdkdotnet/2.1.0/html/L3ServerTutGSLess01.html

ApplicationLicenseManager.AddProcessLicenses(Assembly.GetExecutingAssembly(), "License.lic");
MyServerManager server = new MyServerManager();
ApplicationInstance.Default.Start(server, null, server); //Start the server

ApplicationInstance.Default.Start(server, null, server)" 出现以下错误：System.NullReferenceException：Object 引用未设置为对象实例。在 UnifiedAutomation.UaServer.ServerSettings..ctor（ApplicationInstance 申请） UnifiedAutomation.UaServer.ServerManager.OnServerStarting（ ApplicationInstance应用程序） UnifiedAutomation.UaBase.ServerBase.Start（ApplicationInstance 应用程序）在UnifiedAutomation.UaServer.ServerManager.Start（ ApplicationInstance应用程序） UnifiedAutomation.UaBase.ApplicationInstance.Start（ServerBase服务器，WaitCallback回调，Object userData）at VeitsServer.TapakoServerStarter.StartAkomiServer（IDevice 在TapakoServerStarter.cs：line中的testDeviceToLink）。 39点 Implementationstests.OpcUaServerTest.ServerShouldRun（）in OpcUaServerTest.cs：第44行

如果代码从Main()内部启动，则相同的代码可以正常工作。但是，当我尝试在同一项目地图（例如测试项目）中的外部项目上调用OpcUaServerStarter时，会出现NullReferenceException。

也许Project必须编译为.dll或者我必须添加一些引用？或者有一些原因，MyServerManager的可见性是internal在OPC-UA网站上。

Exception之前的调试会话看起来像这样：

MyServerManager类（仅对工作MyServerManager的重要区别可能是public封装）：

 public class MyServerManager : ServerManager
{

    private NodeManager _nodeManager;
    private ObjectModel _objectModel;

    /// <summary>
    /// Method is called (from SDK) when NodeManager starts up.
    /// </summary>
    /// <param name="rootNodeManager"></param>
    protected override void OnRootNodeManagerStarted(RootNodeManager rootNodeManager)
    {
        Console.WriteLine("Creating Node Manager.");

        _nodeManager = new NodeManager(this);
        _nodeManager.Startup();

        _objectModel = new ObjectModel(_nodeManager);
    }

    /// <summary>
    /// Creates an internal model of the given device and automatically creates nodes and callbacks
    /// </summary>
    /// <param name="device">AKOMI Device that will be shown on the Server</param>
    public void LinkObjectToModel(IDevice device)
    {
        if (_objectModel == null)
        {
            throw new NullReferenceException("hv: objectModel is not initilized, try starting the server first.");
        }

        Console.WriteLine("Register Device: " + device.GetType().Name);
        _objectModel.RegisterAkomiDevice(device, 0, 4);
    }

    /// <summary>
    /// Creates an internal model of the given entity and automatically creates nodes and callbacks
    /// </summary>
    public void LinkObjectToModel(object entity, string name, int curLvl, int maxLvl)
    {
        if (_objectModel == null)
        {
            throw new NullReferenceException("hv: objectModel is not initilized, try starting the server first.");
        }

        Console.WriteLine("Register Entity: " + name);
        _objectModel.RegisterEntity(entity, name, curLvl, maxLvl);
    }

}

谢谢！

Answer 1

最后我找到了一个解决方案。我不得不将以下代码添加到“App.config”文件中。希望它能解决你的问题！

<?xml version="1.0"?> <!--The UA Server needs this App.config!-->
<configuration>
  <configSections>
    <section name="UaApplicationConfiguration" type="UnifiedAutomation.UaBase.ApplicationConfigurationSection,UnifiedAutomation.UaBase"/>
  </configSections>
  <UaApplicationConfiguration>

    <SecuredApplication xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://opcfoundation.org/UA/2011/03/SecuredApplication.xsd" xmlns:ua="http://opcfoundation.org/UA/2008/02/Types.xsd">

      <!-- Identify the Application -->
      <ApplicationName>My Server</ApplicationName>
      <ApplicationUri>urn:localhost:UnifiedAutomation:MyServer</ApplicationUri>
      <ApplicationType>Server_0</ApplicationType>

      <!-- Specify location of Certificates and Trust Lists -->
      <ApplicationCertificate>
        <StoreType>Directory</StoreType>
        <StorePath>%CommonApplicationData%\unifiedautomation\UaSdkNet\pki\own</StorePath>
        <SubjectName>CN=GettingStartedServer/O=UnifiedAutomation/DC=localhost</SubjectName>
        <ValidationOptions>0</ValidationOptions>
      </ApplicationCertificate>
      <TrustedCertificateStore>
        <StoreType>Directory</StoreType>
        <StorePath>%CommonApplicationData%\unifiedautomation\UaSdkNet\pki\trusted</StorePath>
        <ValidationOptions>0</ValidationOptions>
      </TrustedCertificateStore>
      <IssuerCertificateStore>
        <StoreType>Directory</StoreType>
        <StorePath>%CommonApplicationData%\unifiedautomation\UaSdkNet\pki\issuers</StorePath>
        <ValidationOptions>0</ValidationOptions>
      </IssuerCertificateStore>
      <RejectedCertificatesStore>
        <StoreType>Directory</StoreType>
        <StorePath>%CommonApplicationData%\unifiedautomation\UaSdkNet\pki\rejected</StorePath>
        <ValidationOptions>0</ValidationOptions>
      </RejectedCertificatesStore>

      <!-- Specify Endpoints the Server will use -->
      <BaseAddresses>
        <BaseAddress>opc.tcp://localhost:48030</BaseAddress>

        <!--
        Uncomment this line to enable the HTTPS based profiles.

        This profile works but is not officially supported in this version of the SDK.
        This is the HTTP based protocol that will be supported by embedded devices.

        Enabling this profile requires that you have a HTTPS certificate issued by a certificate authority
        in your root certificate store. You can create your own authority and add it to the root store or
        you can use authorities like VeriSign or Thawte.
        -->
        <!--
        <BaseAddress>https://localhost:48031/</BaseAddress>
         -->

        <!--
        Uncomment this line to enable the WS-Secure Conversation based profiles.

        This profile works but is not officially supported since it is not practical to support on embedded devices.
        You should not enable this protocol unless you have an application that must support XML Web Services.
        -->
        <!--
        <BaseAddress>http://localhost:48032/wssecurity/</BaseAddress>
        -->
      </BaseAddresses>

      <!-- Specify the SecurityProfiles the Server supports -->
      <SecurityProfiles>
        <SecurityProfile>
          <ProfileUri>http://opcfoundation.org/UA/SecurityPolicy#Basic256</ProfileUri>
          <Enabled>true</Enabled>
        </SecurityProfile>
        <SecurityProfile>
          <ProfileUri>http://opcfoundation.org/UA/SecurityPolicy#Basic128Rsa15</ProfileUri>
          <Enabled>true</Enabled>
        </SecurityProfile>
        <SecurityProfile>
          <ProfileUri>http://opcfoundation.org/UA/SecurityPolicy#None</ProfileUri>
          <Enabled>true</Enabled>
        </SecurityProfile>
      </SecurityProfiles>

      <!-- Specify Configuration for Different Components (Can include 'YourCompany' Configuration) -->
      <Extensions>

        <!-- Specify the Trace settings for the Application -->
        <Extension>
          <TraceSettings xmlns="http://unifiedautomation.com/schemas/2011/12/Application.xsd" MasterTraceEnabled="false" DefaultTraceLevel="Info">
            <TraceFile>%CommonApplicationData%\unifiedautomation\logs\GettingStartedServer.log.txt</TraceFile>
            <MaxEntriesPerLog>100000</MaxEntriesPerLog>
            <MaxLogFileBackups>3</MaxLogFileBackups>
            <FastTrace>false</FastTrace>
            <ModuleSettings>
              <ModuleTraceSettings ModuleName="UnifiedAutomation.Stack"/>
              <ModuleTraceSettings ModuleName="UnifiedAutomation.Server"/>
            </ModuleSettings>
          </TraceSettings>
        </Extension>

        <!-- Specify Settings when EXE is run with the /install argument -->
        <Extension>
          <InstallationSettings xmlns="http://unifiedautomation.com/schemas/2011/12/Application.xsd">
            <GenerateCertificateIfNone>true</GenerateCertificateIfNone>
            <DeleteCertificateOnUninstall>true</DeleteCertificateOnUninstall>
          </InstallationSettings>
        </Extension>

        <!-- Specify Settings for the ServerManager -->
        <Extension>
          <ServerSettings xmlns="http://unifiedautomation.com/schemas/2011/12/Application.xsd">
            <ProductName>UnifiedAutomation GettingStartedServer</ProductName>
            <DiscoveryRegistration>
              <Enabled>false</Enabled>
            </DiscoveryRegistration>
          </ServerSettings>
        </Extension>

        <Extension>
          <SessionSettings xmlns="http://unifiedautomation.com/schemas/2011/12/Application.xsd">
            <MaxSessionCount>100</MaxSessionCount>
          </SessionSettings>
        </Extension>

        <!-- Specify Settings for the SubscriptionManager -->
        <Extension>
          <SubscriptionSettings xmlns="http://unifiedautomation.com/schemas/2011/12/Application.xsd">
            <MaxSubscriptionCount>500</MaxSubscriptionCount>
          </SubscriptionSettings>
        </Extension>

      </Extensions>
    </SecuredApplication>
  </UaApplicationConfiguration>

  <system.serviceModel>
    <services>
      <service name="UnifiedAutomation.UaBase.SessionEndpoint" behaviorConfiguration="SessionEndpoint.Behavior">
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
        <!--
        Must turn on mexHttpsBinding instead of mexHttpBinding if only HTTPS endpoint configured.
        <endpoint address="mex" binding="mexHttpsBinding" contract="IMetadataExchange"/>
        -->
      </service>
    </services>

    <!-- Servers deployed in production environments should turn the httpGetEnabled and includeExceptionDetailInFaults options off -->
    <behaviors>
      <serviceBehaviors>
        <behavior name="SessionEndpoint.Behavior">
          <serviceDebug includeExceptionDetailInFaults="true"/>
          <serviceMetadata httpGetEnabled="true"/>
          <!--
          Must turn on httpsGetEnabled instead of httpGetEnabled if only HTTPS endpoint configured.
          <serviceMetadata httpsGetEnabled="true" />
          -->
        </behavior>
      </serviceBehaviors>
    </behaviors>

    <!--
    <diagnostics>
        <messageLogging logEntireMessage="true" maxMessagesToLog="3000" logMessagesAtServiceLevel="true" logMalformedMessages="true" logMessagesAtTransportLevel="true"/>
    </diagnostics>
    -->

  </system.serviceModel>

  <!--
  <system.diagnostics>
      <sources>
          <source name="System.ServiceModel" switchValue="Verbose, ActivityTracing">
              <listeners>
                  <add type="System.Diagnostics.DefaultTraceListener" name="Default"/>
                  <add name="ServiceModel Listener"/>
              </listeners>
          </source>
          <source name="System.ServiceModel.MessageLogging">
              <listeners>
                  <add type="System.Diagnostics.DefaultTraceListener" name="Default"/>
                  <add name="ServiceModel Listener"/>
              </listeners>
          </source>
      </sources>
      <sharedListeners>
          <add initializeData="VendorServer.svclog" type="System.Diagnostics.XmlWriterTraceListener, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" name="ServiceModel Listener" traceOutputOptions="LogicalOperationStack, DateTime, Timestamp, ProcessId, ThreadId, Callstack"/>
      </sharedListeners>
  </system.diagnostics>
  -->
</configuration>

从公共访问ServerManager类启动Opc Ua Server会抛出NullPointerException

1 个答案: