一、概述
Oracle Data Provider for .NET, Managed Driver:
Oracle官方的托管数据库访问组件，单DLL，Oracle.ManagedDataAccess.dll，不安装Oracle客户端，不区分32/64位， 直接引用即可。
与非托管程序为Oracle.DataAccess.dll相比，BulkCopy和CustomType之类的都是不支持的：
1、下载地址
官方下载地址：
http://www.oracle.com/technetwork/database/windows/downloads/index-090165.html (当前下版本为64-bit ODAC 12.2c Release 1 (12.2.0.1.0))
nuget：
https://www.nuget.org/packages/Oracle.ManagedDataAccess/ (当前下版本为19.7.0)
https://www.nuget.org/packages/Oracle.ManagedDataAccess.EntityFramework/ (当前下版本为19.7.0)
下载好后 从这个目录下 odp.net\managed\common拿出最关键的两个dll
Oracle.ManagedDataAccess.dll 和 Oracle.ManagedDataAccess.EntityFramework.dll 。
也可以在项目Nuget中直接安装这两个包。
注意:如果需要Entity Framework 设计时特性和其他如TableAdapter向导Visual Studio设计器，可以从https://otn.oracle.com/dotnet下载32位的“Oracle Developer Tools for Visual Studio” 。
此NuGet下载不支持设计时工具;它只提供运行时支持。这个版本的ODP.NET支持Oracle数据库版本11.2或更高版本。
二、配置文件定义数据源
1、无配置文件情况，直接连接DB
无SQL*Net配置文件tnsnames.ora，直接在C#程序中写连接字符串
string conString = "User Id=hr; password=hr;Data Source=localhost:1521/orcl; Pooling=false;";2、使用配置文件方式：
1、使用 tnsnames.ora文件，此文件需放置在应用程序同目录:
tnsnames.ora内容：
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)2、使用app.config或\web.config配置文件定义别名（无tnsnames.ora文件）
<oracle.manageddataaccess.client>
<version number="*">
<dataSources>
<dataSource alias="orcl" descriptor="(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME = orcl)))"/>
</dataSources>
</version>
</oracle.manageddataaccess.client>3、使用 TNS_ADMIN目录：
<oracle.manageddataaccess.client>
<version number="*">
<settings>
<setting name="TNS_ADMIN" value="C:\app\oracle\product\12.1.0\client_1\Network\Admin\"/>
</settings>
</version>
</oracle.manageddataaccess.client>3、完整的app/web.config 文件：
<configuration>
<configSections>
<section name="oracle.manageddataaccess.client"
type="OracleInternal.Common.ODPMSectionHandler, Oracle.ManagedDataAccess, Version=4.122.19.1, Culture=neutral, PublicKeyToken=89b483f429c47342"/>
</configSections>
<system.data>
<DbProviderFactories>
<remove invariant="Oracle.ManagedDataAccess.Client"/>
<add name="ODP.NET, Managed Driver" invariant="Oracle.ManagedDataAccess.Client" description="Oracle Data Provider for .NET, Managed Driver"
type="Oracle.ManagedDataAccess.Client.OracleClientFactory, Oracle.ManagedDataAccess, Version=4.122.19.1, Culture=neutral, PublicKeyToken=89b483f429c47342"/>
</DbProviderFactories>
</system.data>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<publisherPolicy apply="no"/>
<assemblyIdentity name="Oracle.ManagedDataAccess" publicKeyToken="89b483f429c47342" culture="neutral"/>
<bindingRedirect oldVersion="4.121.0.0 - 4.65535.65535.65535" newVersion="4.122.19.1"/>
</dependentAssembly>
</assemblyBinding>
</runtime>
<oracle.manageddataaccess.client>
<version number="*">
<dataSources>
<dataSource alias="SampleDataSource"
descriptor="(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=ORCL))) "/>
</dataSources>
</version>
</oracle.manageddataaccess.client>
</configuration>三、使用
string conString = "User Id=hr; password=hr; Data Source=orcl;Pooling=false; ";
OracleConnection con = new OracleConnection();
con.ConnectionString = conString;
con.Open();
OracleCommand cmd = con.CreateCommand();
cmd.CommandText = "select first_name from employees where department_id = 60";
OracleDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
string conString = "User Id=hr; password=hr; Data Source=orcl;Pooling=false; ";
OracleConnection con = new OracleConnection();
con.ConnectionString = conString;
con.Open();
OracleCommand cmd = con.CreateCommand();
cmd.CommandText = "select first_name from employees where department_id = 60";
OracleDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
Console.WriteLine("Employee Name: " + reader.GetString(0));
}
Console.WriteLine("Employee Name: " + reader.GetString(0));
}到此这篇关于C#使用Oracle.ManagedDataAccess.dll组件连接Oracle数据库的文章就介绍到这了。希望对大家的学习有所帮助，也希望大家多多支持编程网。
