连接到远程 Oracle 服务器时出现问题 Visual Studio 2015
Problems Connecting to Remote Oracle Server Visual Studio 2015
好的，这是我实际看到的错误：
An error occurred accessing the database. This usually means that the connection to the database failed. Check that the connection string is correct and that the appropriate DbContext constructor is being used to specify it or find it in the application's config file. See http://go.microsoft.com/fwlink/?LinkId=386386 for information on DbContext and connections. See the inner exception for details of the failure.
奇怪的是，当我转到 Visual Studio 并打开数据连接并通过那个小工具添加到我的远程服务器时，我可以很好地连接到它。但是，我似乎无法使用 ConnectionStrings 通过我的应用程序连接到它。这是连接时的完整错误日志。
Using StartUp project 'Chime System'.
Using NuGet project 'Chime System'.
Specify the '-Verbose' flag to view the SQL statements being applied to the target database.
System.Data.Entity.Core.ProviderIncompatibleException: An error occurred
accessing the database. This usually means that the connection to the database failed. Check that the connection string is correct and that the appropriate DbContext constructor is being used to specify it or find it in the application's config file. See http://go.microsoft.com/fwlink/?LinkId=386386 for information on DbContext and connections. See the inner exception for details of the failure. ---> System.Data.Entity.Core.ProviderIncompatibleException: The provider did not return a ProviderManifestToken string. ---> Oracle.ManagedDataAccess.Client.OracleException: ORA-12154: TNS:could not resolve the connect identifier specified ---> OracleInternal.Network.NetworkException: ORA-12154: TNS:could not resolve the connect identifier specified
at OracleInternal.Network.AddressResolution..ctor(String TNSAlias, String instanceName)
at OracleInternal.Network.OracleCommunication.DoConnect(String tnsDescriptor)
at OracleInternal.Network.OracleCommunication.Connect(String tnsDescriptor, Boolean doNAHandshake, String IName)
at OracleInternal.ServiceObjects.OracleConnectionImpl.Connect(ConnectionString cs, Boolean bOpenEndUserSession, CriteriaCtx criteriaCtx, String instanceName)
--- End of inner exception stack trace ---
at OracleInternal.ConnectionPool.PoolManager`3.Get(ConnectionString csWithDiffOrNewPwd, Boolean bGetForApp, CriteriaCtx criteriaCtx, String affinityInstanceName, Boolean bForceMatch)
at OracleInternal.ConnectionPool.OraclePoolManager.Get(ConnectionString csWithNewPassword, Boolean bGetForApp, CriteriaCtx criteriaCtx, String affinityInstanceName, Boolean bForceMatch)
at OracleInternal.ConnectionPool.OracleConnectionDispenser`3.Get(ConnectionString cs, PM conPM, ConnectionString pmCS, SecureString securedPassword, SecureString securedProxyPassword, CriteriaCtx criteriaCtx)
at Oracle.ManagedDataAccess.Client.OracleConnection.Open()
at Oracle.ManagedDataAccess.EntityFramework.EFOracleProviderServices.GetDbProviderManifestToken(DbConnection connection)
at System.Data.Entity.Core.Common.DbProviderServices.GetProviderManifestToken(DbConnection connection)
--- End of inner exception stack trace ---
at System.Data.Entity.Core.Common.DbProviderServices.GetProviderManifestToken(DbConnection connection)
at System.Data.Entity.Utilities.DbProviderServicesExtensions.GetProviderManifestTokenChecked(DbProviderServices providerServices, DbConnection connection)
--- End of inner exception stack trace ---
at System.Data.Entity.Utilities.DbProviderServicesExtensions.GetProviderManifestTokenChecked(DbProviderServices providerServices, DbConnection connection)
at System.Data.Entity.Infrastructure.DefaultManifestTokenResolver.<>c__DisplayClass1.<ResolveManifestToken>b__0(Tuple`3 k)
at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
at System.Data.Entity.Infrastructure.DefaultManifestTokenResolver.ResolveManifestToken(DbConnection connection)
at System.Data.Entity.Utilities.DbConnectionExtensions.GetProviderInfo(DbConnection connection, DbProviderManifest& providerManifest)
at System.Data.Entity.DbModelBuilder.Build(DbConnection providerConnection)
at System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext internalContext)
at System.Data.Entity.Internal.RetryLazy`2.GetValue(TInput input)
at System.Data.Entity.Internal.LazyInternalContext.InitializeContext()
at System.Data.Entity.Internal.LazyInternalContext.get_ModelBeingInitialized()
at System.Data.Entity.Infrastructure.EdmxWriter.WriteEdmx(DbContext context, XmlWriter writer)
at System.Data.Entity.Utilities.DbContextExtensions.<>c__DisplayClass1.<GetModel>b__0(XmlWriter w)
at System.Data.Entity.Utilities.DbContextExtensions.GetModel(Action`1 writeXml)
at System.Data.Entity.Utilities.DbContextExtensions.GetModel(DbContext context)
at System.Data.Entity.Migrations.DbMigrator..ctor(DbMigrationsConfiguration configuration, DbContext usersContext, DatabaseExistenceState existenceState, Boolean calledByCreateDatabase)
at System.Data.Entity.Migrations.DbMigrator..ctor(DbMigrationsConfiguration configuration)
at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.GetMigrator()
at System.Data.Entity.Migrations.Design.ToolingFacade.UpdateRunner.Run()
at System.AppDomain.DoCallBack(CrossAppDomainDelegate callBackDelegate)
at System.AppDomain.DoCallBack(CrossAppDomainDelegate callBackDelegate)
at System.Data.Entity.Migrations.Design.ToolingFacade.Run(BaseRunner runner)
at System.Data.Entity.Migrations.Design.ToolingFacade.Update(String targetMigration, Boolean force)
at System.Data.Entity.Migrations.UpdateDatabaseCommand.<>c__DisplayClass2.<.ctor>b__0()
at System.Data.Entity.Migrations.MigrationsDomainCommand.Execute(Action command)
An error occurred accessing the database. This usually means that the connection to the database failed. Check that the connection string is correct and that the appropriate DbContext constructor is being used to specify it or find it in the application's config file. See http://go.microsoft.com/fwlink/?LinkId=386386 for information on DbContext and connections. See the inner exception for details of the failure.
这是应用程序的连接字符串信息：
<section name="oracle.manageddataaccess.client" type="OracleInternal.Common.ODPMSectionHandler, Oracle.ManagedDataAccess, Version=4.122.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
<connectionStrings>
<add name="defaultConnection" connectionString="Data Source=myServer;Persist Security Info=True;User ID=myUserID;Password=***********;" providerName="Oracle.ManagedDataAccess.Client"/>
</connectionStrings>
<oracle.manageddataaccess.client>
<version number="*">
<dataSources>
<dataSource alias="SampleDataSource" descriptor="(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=myServer)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=ORCL)))" />
</dataSources>
</version>
</oracle.manageddataaccess.client>
这里是来自数据连接工具的 ConnectionString
connectionString = Data Source=myServer;Persist Security Info=True;User ID=myUserID;Password=***********;Unicode=True
provider = .NET Framework Data Provider for Oracle
所以我的问题是我到底做错了什么？我的应用程序中的 ConnectionStrings 有误吗？我也不认为这是我的防火墙，尽管我会仔细检查一下。您可以提供的任何帮助或建议都会有所帮助。
该错误消息的重要部分如下：
ORA-12154: TNS:could 无法解析指定的连接标识符
您正在尝试使用端口 1521 连接到主机 myServer 上名为 ORCL 的服务。
第一个问题：你能ping通那台服务器吗？ （即：DNS 有效吗？你真的可以与服务器建立网络连接吗？）我猜你可以。
第二个问题：Oracle 侦听器 运行ning 在该服务器上吗？
您可以让数据库服务器上的 oracle 用户 运行 执行以下命令来查明这一点：
lsnrctl status 该命令的输出应向您显示在服务器上找到的服务的名称以及侦听器所在的端口号 运行。如果它说没有服务，那么它不是 运行ning，它需要 运行ning。 lsnrctl start 因为 oracle 用户会得到它 运行ning 并且 lsnrctl status 会告诉您可用的端口和服务。
如果非要我猜的话，我会说你的侦听器 运行ning 在数据库服务器上，它正在侦听端口 1521，但你正试图访问一个没有被侦听的服务名称对于（即：您在该服务器上没有 ORCL 服务）。
好的，这是我实际看到的错误：
An error occurred accessing the database. This usually means that the connection to the database failed. Check that the connection string is correct and that the appropriate DbContext constructor is being used to specify it or find it in the application's config file. See http://go.microsoft.com/fwlink/?LinkId=386386 for information on DbContext and connections. See the inner exception for details of the failure.
奇怪的是，当我转到 Visual Studio 并打开数据连接并通过那个小工具添加到我的远程服务器时，我可以很好地连接到它。但是，我似乎无法使用 ConnectionStrings 通过我的应用程序连接到它。这是连接时的完整错误日志。
Using StartUp project 'Chime System'.
Using NuGet project 'Chime System'.
Specify the '-Verbose' flag to view the SQL statements being applied to the target database.
System.Data.Entity.Core.ProviderIncompatibleException: An error occurred
accessing the database. This usually means that the connection to the database failed. Check that the connection string is correct and that the appropriate DbContext constructor is being used to specify it or find it in the application's config file. See http://go.microsoft.com/fwlink/?LinkId=386386 for information on DbContext and connections. See the inner exception for details of the failure. ---> System.Data.Entity.Core.ProviderIncompatibleException: The provider did not return a ProviderManifestToken string. ---> Oracle.ManagedDataAccess.Client.OracleException: ORA-12154: TNS:could not resolve the connect identifier specified ---> OracleInternal.Network.NetworkException: ORA-12154: TNS:could not resolve the connect identifier specified
at OracleInternal.Network.AddressResolution..ctor(String TNSAlias, String instanceName)
at OracleInternal.Network.OracleCommunication.DoConnect(String tnsDescriptor)
at OracleInternal.Network.OracleCommunication.Connect(String tnsDescriptor, Boolean doNAHandshake, String IName)
at OracleInternal.ServiceObjects.OracleConnectionImpl.Connect(ConnectionString cs, Boolean bOpenEndUserSession, CriteriaCtx criteriaCtx, String instanceName)
--- End of inner exception stack trace ---
at OracleInternal.ConnectionPool.PoolManager`3.Get(ConnectionString csWithDiffOrNewPwd, Boolean bGetForApp, CriteriaCtx criteriaCtx, String affinityInstanceName, Boolean bForceMatch)
at OracleInternal.ConnectionPool.OraclePoolManager.Get(ConnectionString csWithNewPassword, Boolean bGetForApp, CriteriaCtx criteriaCtx, String affinityInstanceName, Boolean bForceMatch)
at OracleInternal.ConnectionPool.OracleConnectionDispenser`3.Get(ConnectionString cs, PM conPM, ConnectionString pmCS, SecureString securedPassword, SecureString securedProxyPassword, CriteriaCtx criteriaCtx)
at Oracle.ManagedDataAccess.Client.OracleConnection.Open()
at Oracle.ManagedDataAccess.EntityFramework.EFOracleProviderServices.GetDbProviderManifestToken(DbConnection connection)
at System.Data.Entity.Core.Common.DbProviderServices.GetProviderManifestToken(DbConnection connection)
--- End of inner exception stack trace ---
at System.Data.Entity.Core.Common.DbProviderServices.GetProviderManifestToken(DbConnection connection)
at System.Data.Entity.Utilities.DbProviderServicesExtensions.GetProviderManifestTokenChecked(DbProviderServices providerServices, DbConnection connection)
--- End of inner exception stack trace ---
at System.Data.Entity.Utilities.DbProviderServicesExtensions.GetProviderManifestTokenChecked(DbProviderServices providerServices, DbConnection connection)
at System.Data.Entity.Infrastructure.DefaultManifestTokenResolver.<>c__DisplayClass1.<ResolveManifestToken>b__0(Tuple`3 k)
at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
at System.Data.Entity.Infrastructure.DefaultManifestTokenResolver.ResolveManifestToken(DbConnection connection)
at System.Data.Entity.Utilities.DbConnectionExtensions.GetProviderInfo(DbConnection connection, DbProviderManifest& providerManifest)
at System.Data.Entity.DbModelBuilder.Build(DbConnection providerConnection)
at System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext internalContext)
at System.Data.Entity.Internal.RetryLazy`2.GetValue(TInput input)
at System.Data.Entity.Internal.LazyInternalContext.InitializeContext()
at System.Data.Entity.Internal.LazyInternalContext.get_ModelBeingInitialized()
at System.Data.Entity.Infrastructure.EdmxWriter.WriteEdmx(DbContext context, XmlWriter writer)
at System.Data.Entity.Utilities.DbContextExtensions.<>c__DisplayClass1.<GetModel>b__0(XmlWriter w)
at System.Data.Entity.Utilities.DbContextExtensions.GetModel(Action`1 writeXml)
at System.Data.Entity.Utilities.DbContextExtensions.GetModel(DbContext context)
at System.Data.Entity.Migrations.DbMigrator..ctor(DbMigrationsConfiguration configuration, DbContext usersContext, DatabaseExistenceState existenceState, Boolean calledByCreateDatabase)
at System.Data.Entity.Migrations.DbMigrator..ctor(DbMigrationsConfiguration configuration)
at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.GetMigrator()
at System.Data.Entity.Migrations.Design.ToolingFacade.UpdateRunner.Run()
at System.AppDomain.DoCallBack(CrossAppDomainDelegate callBackDelegate)
at System.AppDomain.DoCallBack(CrossAppDomainDelegate callBackDelegate)
at System.Data.Entity.Migrations.Design.ToolingFacade.Run(BaseRunner runner)
at System.Data.Entity.Migrations.Design.ToolingFacade.Update(String targetMigration, Boolean force)
at System.Data.Entity.Migrations.UpdateDatabaseCommand.<>c__DisplayClass2.<.ctor>b__0()
at System.Data.Entity.Migrations.MigrationsDomainCommand.Execute(Action command)
An error occurred accessing the database. This usually means that the connection to the database failed. Check that the connection string is correct and that the appropriate DbContext constructor is being used to specify it or find it in the application's config file. See http://go.microsoft.com/fwlink/?LinkId=386386 for information on DbContext and connections. See the inner exception for details of the failure.
这是应用程序的连接字符串信息：
<section name="oracle.manageddataaccess.client" type="OracleInternal.Common.ODPMSectionHandler, Oracle.ManagedDataAccess, Version=4.122.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
<connectionStrings>
<add name="defaultConnection" connectionString="Data Source=myServer;Persist Security Info=True;User ID=myUserID;Password=***********;" providerName="Oracle.ManagedDataAccess.Client"/>
</connectionStrings>
<oracle.manageddataaccess.client>
<version number="*">
<dataSources>
<dataSource alias="SampleDataSource" descriptor="(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=myServer)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=ORCL)))" />
</dataSources>
</version>
</oracle.manageddataaccess.client>
这里是来自数据连接工具的 ConnectionString
connectionString = Data Source=myServer;Persist Security Info=True;User ID=myUserID;Password=***********;Unicode=True
provider = .NET Framework Data Provider for Oracle
所以我的问题是我到底做错了什么？我的应用程序中的 ConnectionStrings 有误吗？我也不认为这是我的防火墙，尽管我会仔细检查一下。您可以提供的任何帮助或建议都会有所帮助。
该错误消息的重要部分如下：
ORA-12154: TNS:could 无法解析指定的连接标识符
您正在尝试使用端口 1521 连接到主机 myServer 上名为 ORCL 的服务。
第一个问题：你能ping通那台服务器吗？ （即：DNS 有效吗？你真的可以与服务器建立网络连接吗？）我猜你可以。
第二个问题：Oracle 侦听器 运行ning 在该服务器上吗？
您可以让数据库服务器上的 oracle 用户 运行 执行以下命令来查明这一点：
lsnrctl status 该命令的输出应向您显示在服务器上找到的服务的名称以及侦听器所在的端口号 运行。如果它说没有服务，那么它不是 运行ning，它需要 运行ning。 lsnrctl start 因为 oracle 用户会得到它 运行ning 并且 lsnrctl status 会告诉您可用的端口和服务。
如果非要我猜的话，我会说你的侦听器 运行ning 在数据库服务器上，它正在侦听端口 1521，但你正试图访问一个没有被侦听的服务名称对于（即：您在该服务器上没有 ORCL 服务）。