Oracle 10g ORA-12154 TNS：无法解析指定的连接标示符
卸载ODP for .Net (或者卸载ODT for .Net, ODT中包含ODP, ODT 是VS.Net的一个集成插件，用于连接和浏览oracle数据库，并且提供对
自己总结和整理下：
1.检查注册表，HKey_LocalMachineSoftwareOracle下面的Oracle_Home，若不对，修改成正确的；
2.卸载ODP for .Net (或者卸载ODT for .Net, ODT中包含ODP, ODT 是VS.Net的一个集成插件，用于连接和浏览oracle数据库，并且提供对oracle数据库的拖拽操作，类似VS.Net对于SQL Server的资源管理器)；
3.如果ODT for .Net的目录依然存在，，删除或者重命名此目录；
然后重起系统，重新连接ASP.Net程序，如果还有同样的错误，看着办吧，我建议重装Oracle吧。
分析原因：系统原来装的是ORACLE 10G 10.1.0，卸载后还没重启就装上10.2.0，结果先是监听器起不来，竟然还是指向10.1.0的位置，监听器当然不能启动了。
处理过程：
1、查找注册表，将监听器指向新的位置，重启服务，OK；
2、PL/SQL DEVELOPER还是连接不了，其它方式都正常。将原先安装在其它逻辑盘的ODP for .Net 卸载重装到与ORACLE 10.2.0同一位置。重启系统，DEVELOPER还是报错，不过些时报错提示信息为空。
3、因为DEVELOPER设置有更改后，进入菜单TOOLS》PREFERENCES...设置，在ORACLE下的CONNECTION中，将ORACLE HOME和OCI LIBIARY设为空即自动检测。连接正常，问题解决。
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