return new OracleConnection(
new OracleConnectionStringBuilder()
{
DataSource = _server,
Pooling = _poolEnabled,
MinPoolSize = _minPoolSize,
MaxPoolSize = _maxPoolSize,
UserID = _username,
Password = _password,
ConnectionTimeout = _timeout
}.ToString()
);
代码段在OWIN应用程序之外工作。但是当在owin上下文中调用它会抛出异常类型初始化器或'OracleInternal.Common.ProviderConfig'引发异常，并且程序集中的'Microsoft.Owin.OwinContext'未标记为可序列化。
详细例外如下，
System.TypeInitializationException was unhandled by user code
HResult=-2146233036
Message=The type initializer for 'OracleInternal.Common.ProviderConfig' threw an exception.
Source=Oracle.ManagedDataAccess
TypeName=OracleInternal.Common.ProviderConfig
StackTrace:
at Oracle.ManagedDataAccess.Client.OracleConnectionStringBuilder..ctor()
at XYZ.Habitat.Data.DSXReader.OracleDSXConfig.ConjureConnection() in c:\__work\MIS2\XYZ.Habitat\Data\DSXReader.cs:line 168
at XYZ.Habitat.Data.DSXReader.get_ConnectionString(String index) in c:\__work\MIS2\XYZ.Habitat\Data\DSXReader.cs:line 235
at XYZ.Habitat.Kernel.CreateDbConnection(String key) in c:\__work\MIS2\XYZ.Habitat\Kernel.cs:line 202
at XYZ.REF.Controllers.RefController.List(String id) in c:\__work\MIS2\XYZ.REF\Controllers\RefController.cs:line 66
at lambda_method(Closure , Object , Object[] )
at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass6_1.<GetExecutor>b__3(Object instance, Object[] methodParameters)
at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)
at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)
InnerException: System.Configuration.ConfigurationErrorsException
HResult=-2146232062
Message=An error occurred creating the configuration section handler for oracle.manageddataaccess.client: Type 'Microsoft.Owin.OwinContext' in assembly 'Microsoft.Owin, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' is not marked as serializable. (c:\__work\mis2\__build\Debug\XYZ.MIS2.TEST.dll.config line 46)
Source=System.Configuration
BareMessage=An error occurred creating the configuration section handler for oracle.manageddataaccess.client: Type 'Microsoft.Owin.OwinContext' in assembly 'Microsoft.Owin, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' is not marked as serializable.
Filename=c:\__work\mis2\__build\Debug\XYZ.MIS2.TEST.dll.config
Line=46
StackTrace:
at System.Configuration.BaseConfigurationRecord.EvaluateOne(String[] keys, SectionInput input, Boolean isTrusted, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult)
at System.Configuration.BaseConfigurationRecord.Evaluate(FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult, Boolean getLkg, Boolean getRuntimeObject, Object& result, Object& resultRuntimeObject)
at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
at System.Configuration.BaseConfigurationRecord.GetSection(String configKey)
at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName)
at System.Configuration.ConfigurationManager.GetSection(String sectionName)
at OracleInternal.Common.CustomConfigFileReader.ParseAndCacheConfigParams()
at OracleInternal.Common.CustomConfigFileReader.ParseConfigFile()
at OracleInternal.Common.ConfigBaseClass.GetInstance(Boolean bIsManaged)
at OracleInternal.Common.ProviderConfig..cctor()
InnerException: System.Runtime.Serialization.SerializationException
HResult=-2146233076
Message=Type 'Microsoft.Owin.OwinContext' in assembly 'Microsoft.Owin, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' is not marked as serializable.
Source=mscorlib
StackTrace:
at System.AppDomain.get_Evidence()
at System.AppDomain.get_EvidenceNoDemand()
at System.AppDomain.get_Evidence()
at System.Configuration.ClientConfigPaths.GetEvidenceInfo(AppDomain appDomain, String exePath, String& typeName)
at System.Configuration.ClientConfigPaths.GetTypeAndHashSuffix(AppDomain appDomain, String exePath)
at System.Configuration.ClientConfigPaths..ctor(String exePath, Boolean includeUserConfig)
at System.Configuration.ClientConfigPaths.GetPaths(String exePath, Boolean includeUserConfig)
at System.Configuration.ClientConfigurationHost.RequireCompleteInit(IInternalConfigRecord record)
at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
at System.Configuration.BaseConfigurationRecord.GetSection(String configKey)
at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName)
at System.Configuration.ConfigurationManager.GetSection(String sectionName)
at System.Xml.XmlConfiguration.XmlReaderSection.get_ProhibitDefaultUrlResolver()
at System.Xml.Schema.Parser..ctor(SchemaType schemaType, XmlNameTable nameTable, SchemaNames schemaNames, ValidationEventHandler eventHandler)
at System.Xml.Schema.XmlSchemaSet.ParseSchema(String targetNamespace, XmlReader reader)
at System.Xml.Schema.XmlSchemaSet.Add(String targetNamespace, XmlReader schemaDocument)
at OracleInternal.Common.CustomConfigFileReader.ValidateBaseDocument(XmlDocument doc)
at OracleInternal.Common.ODPMSectionHandler.DeserializeElement(XmlReader reader, Boolean serializeCollectionKey)
at System.Configuration.ConfigurationSection.DeserializeSection(XmlReader reader)
at System.Configuration.RuntimeConfigurationRecord.RuntimeConfigurationFactory.CreateSectionImpl(RuntimeConfigurationRecord configRecord, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentConfig, ConfigXmlReader reader)
at System.Configuration.RuntimeConfigurationRecord.RuntimeConfigurationFactory.CreateSectionWithRestrictedPermissions(RuntimeConfigurationRecord configRecord, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentConfig, ConfigXmlReader reader)
at System.Configuration.RuntimeConfigurationRecord.CreateSection(Boolean inputIsTrusted, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentConfig, ConfigXmlReader reader)
at System.Configuration.BaseConfigurationRecord.CallCreateSection(Boolean inputIsTrusted, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentConfig, ConfigXmlReader reader, String filename, Int32 line)
InnerException:
答案 0 :(得分：1)
我遇到了同样的错误“ OracleInternal.Common.ProviderConfig的类型初始化器抛出异常”。
运行应用程序时，在控制台错误消息中，“定义了重复的'oracle.manageddataaccess.client'部分。”
找出Oracle.ManagedDataAccess的定义是在我的WebAPI web.config和机器配置中。
必须更新此特定machine.config：C：\ Windows \ Microsoft.NET \ Framework64 \ v4.0.30319 \ Config \ machine.config-在“托管”上进行搜索并在3个地方注释掉。