我使用 ODP.NET 和 4.1 版的 Enterprise Library,与 2008 相比。一切都很好。
现在,使用企业库的 ODP.NET Oracle.DataAccess 4.112.2.0 和版本 5.0.414.0 与 2010 .net 4.0 进行迁移。
Oracle.DataAccess 4.112.2.0 EnterpriseLibrary 5.0.414.0
在最近从 Enterprise Library 的 4.1 版升级到 5.0 版之后,一旦我们收到以下错误:
“无法构造类型数据库。您必须配置容器以提供此值。”
Microsoft.Practices.ServiceLocation.ActivationException:尝试获取数据库类型的实例时发生激活错误,键“ConnectionStrings.Oracle.xxx”---> Microsoft.Practices.Unity.ResolutionFailedException:依赖项解析失败,类型=“Microsoft .Practices.EnterpriseLibrary.Data.Database”,名称 = “ConnectionStrings.Oracle.xxx”。异常发生时:解决时。异常是: InvalidOperationException - 无法构造类型数据库。您必须配置容器以提供此值。
参考 EntLib 论坛:http ://entlib.codeplex.com/discussions/215290
有什么解决办法吗??
我的配置
<configSections>
<section name="loggingConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.LoggingSettings, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=709072f976b4c05b"/>
<section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings,Microsoft.Practices.EnterpriseLibrary.Data, Version=5.0.414.0, Culture=neutral, PublicKeyToken=709072f976b4c05b" />
</configSections>
<dataConfiguration defaultDatabase="ConnectionStrings.Oracle.xxx"/>
<connectionStrings>
<add name="ConnectionStrings.Oracle.xxx" connectionString="DATA SOURCE=des;PASSWORD=zzz;PERSIST SECURITY INFO=True;USER ID=aaa;"
providerName="Oracle.DataAccess.Client" />
我的代码
var key = "ConnectionStrings.Oracle.xxx";
Database db = Microsoft.Practices.EnterpriseLibrary.Common.Configuration.EnterpriseLibraryContainer.Current.GetInstance<Database>(key); //~(EntLib 5 recommended)
using (DbCommand cm = db.GetStoredProcCommand("TBL_FRKDATA.TBL_FRKDATA_FND_ALL"))
{
cm.Parameters.Add(CreateCursorParameter("P_REFCURSOR"));
// Using "using" will cause both the DataReader and connection to be
// closed. (ExecuteReader will close the connection when the
// DataReader is closed.)
using (IDataReader dataReader = db.ExecuteReader(cm))
{
while (dataReader.Read())
{
builder.Add(dataReader);
}
return builder.EntityList;
}
}
完整的错误堆栈跟踪
Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy.GuardTypeIsNonPrimitive(IBuilderContext context, SelectedConstructor selectedConstructor) Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy.PreBuildUp(IBuilderContext context) Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(IBuilderContext context) Microsoft.Practices.ObjectBuilder2.DynamicMethodBuildPlanCreatorPolicy。 CreatePlan(IBuilderContext 上下文,NamedTypeBuildKey buildKey)Microsoft.Practices.ObjectBuilder2.BuildPlanStrategy.PreBuildUp(IBuilderContext 上下文)Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(IBuilderContext 上下文)Microsoft.Practices.Unity.UnityContainer.DoBuildUp(类型 t,对象存在,字符串名称,IEnumerable
1 resolverOverrides) Microsoft.Practices.Unity.UnityContainer.DoBuildUp(Type t, Object existing, String name, IEnumerable
1 resolverOverrides) Microsoft.Practices.Unity.UnityContainer.Resolve(Type t, String name, ResolverOverride[] resolverOverrides) Microsoft.Practices.Unity.UnityServiceLocator.DoGetInstance(Type serviceType, String key) Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance(键入 serviceType,字符串键)Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance(键入 serviceType,字符串键)Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance[TService](字符串键)
更新
这段代码对我有用:
[TestMethod]
public void Conectar_con_EntLib_y_OdpNet_Test()
{
var key = "ConnectionStrings.Oracle.xxx";
string connectionString = ConfigurationManager.ConnectionStrings[key].ConnectionString;
string providerName = ConfigurationManager.ConnectionStrings[key].ProviderName;
//Database db = Microsoft.Practices.EnterpriseLibrary.Common.Configuration.EnterpriseLibraryContainer.Current.GetInstance<Database>(key);
TestContext.WriteLine("connectionString: " + connectionString);
TestContext.WriteLine("providerName: " + providerName);
DbProviderFactory factory = DbProviderFactories.GetFactory(providerName);
using (DbConnection connection = factory.CreateConnection())
{
connection.ConnectionString = connectionString;
connection.Open();
TestContext.WriteLine("Estado Conexión: " + connection.State);
connection.Close();
}
}
解决方案:由 Randy Levy ( http://entlib.codeplex.com/discussions/215290 )
您不能将企业库 OracleDatabase 与 Oracle.DataAccess.Client 提供程序一起使用。内置的 OracleDatabase 被硬编码为使用 OracleClientFactory DbProviderFactory,而您想使用 ODP.NET 提供程序 (Oracle.DataAccess.Client)。
最好的方法是让 EntLibContrib Oracle ODP.NET 数据提供程序工作,因为它应该支持您需要的所有内容,包括配置文件。
由于看起来您可以创建 DbProviderFactory,您可以尝试将 GenericDatabase 与 ODP.NET OracleClientFactory 一起使用,但我猜您会遇到特定 Oracle 功能(例如,refcursor)的问题。
你可以直接使用它:
string connectionString = ConfigurationManager.ConnectionStrings["Connection String"].ConnectionString;
string providerName = ConfigurationManager.ConnectionStrings["Connection String"].ProviderName;
DbProviderFactory factory = DbProviderFactories.GetFactory(providerName);
var db = new GenericDatabase(connectionString, factory);