无法构造类型数据库.您必须配置容器以提供此值(EntLib 5 + ODP.NET)

Question

我使用企业库的ODP.NET和4.1版本与2008年相比.一切都很好.

现在,使用ODP.NET Oracle.DataAccess 4.112.2.0和企业库版本5.0.414.0以及2010,.net 4.0进行迁移.

Oracle.DataAccess 4.112.2.0 EnterpriseLibrary 5.0.414.0

在最近从Enterprise 4.1的4.1版升级到5.0之后,一旦我们收到以下错误:

"无法构建类型数据库.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出现激活错误,键"ConnectionStrings.Oracle.xxx"---> Microsoft.Practices.Unity.ResolutionFailedException:依赖项的解析失败,type ="Microsoft .Practices.EnterpriseLibrary.Data.Database",name ="ConnectionStrings.Oracle.xxx".在解决时发生异常:例外情况是:InvalidOperationException - 无法构造数据库类型.您必须配置容器以提供此值.

参考文献EntLib论坛:http://entlib.codeplex.com/discussions/215290

有关它的任何解决方案

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" />

我的守则

 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 context,NamedTypeBuildKey buildKey)Microsoft.Practices.ObjectBuilder2.BuildPlanStrategy.PreBuildUp(IBuilderContext context)Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(IBuilderContext context)Microsoft.Practices.Unity.UnityContainer.DoBuildUp(Type t,Object existing ,,字符串名称,IEnumerable 1 resolverOverrides) Microsoft.Practices.Unity.UnityContainer.DoBuildUp(Type t, Object existing, String name, IEnumerable1 resolverOverrides)Microsoft.Practices.Unity.UnityContainer.Resolve(Type t,String name,ResolverOverride [] resolverOverrides)Microsoft.Practices.Unity.UnityServiceLocator.DoGetInstance(Type serviceType,String key)Microsoft.Practi ces.ServiceLocation.ServiceLocatorImplBase.GetInstance(类型serviceType,String key)Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance(Type serviceType,String key)Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance [TService](String key)

UPDATE

这段代码适合我:

    [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:作者: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,而您希望使用ODP.NET提供程序(Oracle.DataAccess.Client).

最好的方法是使EntLibContrib Oracle ODP.NET数据提供程序正常工作,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功能的问题(例如refcursor).

您可以直接使用它:

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);

Answer 1

添加参考

Microsoft.Practices.EnterpriseLibrary.Common
Microsoft.Practices.EnterpriseLibrary.Data
Microsoft.Practices.ServiceLocation

然后使用这一行来获取数据库：

var database = EnterpriseLibraryContainer.Current.GetInstance<Database>();

更多信息在这里：http://devstuffs.wordpress.com/2012/03/13/enterprise-library-5-with-odp-net/