设置ServicePointManager时的TypeInitializationException.关闭跟踪的Serv

Question

当我尝试设置

时，我得到一个未处理的TypeInitializationException异常

ServicePointManager.ServerCertificateValidationCallback += (a, b, c, d) => true;

当我在我的app.config中获得以下内容(取自MSDN)时，会发生异常。与下面的配置和MSDN上的配置唯一的区别是，我已经将System.Net, System.Net.Cache, System.Net.Sockets和System.Net.WebSockets的日志记录设置为Off。我只看到当所有四个都关闭的问题。

是这个配置有问题还是我错过了其他东西?

<system.diagnostics>
  <sources>
    <source name="System.Net" tracemode="includehex" maxdatasize="1024">
      <listeners>
        <add name="System.Net"/>
      </listeners>
    </source>
    <source name="System.Net.Cache">
      <listeners>
        <add name="System.Net"/>
      </listeners>
    </source>
    <source name="System.Net.Http">
      <listeners>
        <add name="System.Net "/>
      </listeners>
    </source>
    <source name="System.Net.Sockets">
      <listeners>
        <add name="System.Net"/>
      </listeners>
    </source>
    <source name="System.Net.WebSockets">
      <listeners>
        <add name="System.Net"/>
      </listeners>
    </source>
  </sources>
  <switches>
    <add name="System.Net" value="Off"/>
    <add name="System.Net.Cache" value="Off"/>
    <add name="System.Net.Http" value="Verbose"/>
    <add name="System.Net.Sockets" value="Off"/>
    <add name="System.Net.WebSockets" value="Off"/>
  </switches>
  <sharedListeners>
    <add name="System.Net"
         type="System.Diagnostics.TextWriterTraceListener"
         initializeData="network.log"
    />
  </sharedListeners>
  <trace autoflush="true"/>
</system.diagnostics>

这是异常的堆栈轨迹

at System.Net.ServicePointManager.get_ServerCertificateValidationCallback()
at test.Program.Main(String[] args) in c:UsersEoinDocumentsVisual Studio 2013ProjectstesttestProgram.cs:line 12
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()

有一个内部异常，也是TypeInitializationException类型，调用堆栈只包含at System.Net.ServicePointManager..cctor()，消息是"System.Net的类型初始化器"。ComNetOS'抛出了一个异常".

这有一个ConfigurationErrorsException类型的最终内部异常。信息是"监听系统"。Net"在sharedListeners部分中不存在"，堆栈跟踪为

at System.Diagnostics.ListenerElement.GetRuntimeObject()
at System.Diagnostics.ListenerElementsCollection.GetRuntimeObject()
at System.Diagnostics.TraceSource.Initialize()
at System.Net.Logging.InitializeLogging()
at System.Net.Logging.get_On()
at System.Net.ComNetOS..cctor()

Answer 1

System.Net.Http的监听器名称中有一个空格。

<source name="System.Net.Http">
  <listeners>
    <add name="System.Net "/>
  </listeners>
</source>

这将尝试找到一个名为"System.Net "的侦听器，但当然您只有一个名为"System.Net"的侦听器。只要去掉空格，你就完美了。