oracle 64位服务器上报 OraOLEDB.Oracle provider is not registered on thelo cal machine

Failed to test connection. The ‘OraOLEDB.Oracle’ provider is not registered on the local machine.

本机安装的oracle11g的64位客户端，使用.net开发，使用oledb组件连接数据库，报错

The MSDAORA.1 provider is not registered on the local machine

后来把连接字符串改成

Provider=OraOLEDB.Oracle;DataSource=MyOracleDB;UserId=myUsername;Password=my...

报错
The ‘OraOLEDB.Oracle’ provider is not registered on the local machine.

解决方法：安装oracle64位客户端，选择oledb相关组件。安装后，改系统环境变量path，home_1为首选

参考：http://blog.csdn.net/guoneng_wei/article/details/39577349