OraOLEDB.Oracle provider is not registered on your local computer - oracle and windows 64 bit

Question

I have an issue with OleDBConnection in Visual Studio 2012. I reinstal my system from 32 Oracle to 64 Oracle with the same version of Windows 64. And i migrate my project ofcourse where it previously works.

I try to do all things in: OraOLEDB.Oracle provider is not registered on the local machine and also i install 64-bit ODAC 12c Release 4 (12.1.0.2.4) http://www.oracle.com/technetwork/database/windows/downloads/index-090165.html

but it dosen't helped..

Have you any idea how to resolve that problem?

Perhaps you did not make proper uninstall of 32bit Oracle Client, see https://stackoverflow.com/questions/8450726/how-to-uninstall-completely-remove-oracle-11g-client — Wernfried Domscheit, May 24 '17 at 14:14
You can install 32bit and 64 bit Oracle Client at one machine, see https://stackoverflow.com/questions/24104210/badimageformatexception-this-will-occur-when-running-in-64-bit-mode-with-the-32#24120100 — Wernfried Domscheit, May 24 '17 at 14:22
Did you install the Oracle Client (e.g. Instant Client)? It is required by OLE DB provider. — Wernfried Domscheit, May 26 '17 at 14:08
You could, check `readme.htm` file. Maybe you mixed OLE DB 64 bit with existing 32 bit Oracle Client. — Wernfried Domscheit, May 29 '17 at 08:21

PANDA MAN · Answer 1 · 2017-07-13T02:29:54.770

i had similar problem and i fixed it by downloading "ODAC122010Xcopy_x64" from http://www.oracle.com/technetwork/database/windows/downloads/index-090165.html.

follow these steps and try to run your application
Step 1: unzip ODAC122010Xcopy_x64 in any folder on your computer.
Step 2: open command prompt as admin and run the ff commands.
Step 3: cd [ODAC122010Xcopy_x64 directory where you unzip it]
Step 4: INSTALL ALL "[DBHOME PATH]" [ORACLEHOMENAME] TRUE

OraOLEDB.Oracle provider is not registered on your local computer - oracle and windows 64 bit

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