Oracle.DataAccess.Client Dependencies

Question

First of all, I want to use the Oracle.DataAccess.dll to use OracleBulkCopy.

I want to know all the dlls that I need to be able to read from a database and then perform a bulkcopy in Oracle. Currently, we are using only one dll to perform all the reads from databases, we are using Oracle.ManagedDataAccess.Client. But I can't use it to perform a bulkCopy.

I don't want to install ODP.NET for the users, I want to include the dll directly in the program. So I want to know the minimum required dlls to be able to use the Oracle.DataAccess.dll in 32bit and in 64bit.

I know that there are some old post about this, but it's quiet old and the listed dlls are out of date. I can't event find some of them.

I installed the ODP.net for ODAC12 and I retreived all the listed dlls in this post. I also tried with with this post. The listed dlls are pointing out the version 11.

I made a dummy project that opens a connection, reads a table and bulk it in another table. I copied the listed dlls from the posts in the root of the project and I included Oracle.DataAccess.dll in the project.

When I run my program in 64 bit I get the following error:

Could not load file or assembly 'Oracle.DataAccess, Version=4.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342'

When I run it in 32 bit, I get this error:

Unable to load DLL 'OraOps12.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)"

The dlls that I included are:

• oci.dll
• ociw32.dll
• Oracle.DataAccess.dll
• orannzsbb12.dll
• oraocci12.dll
• oraociei12.dll
• OraOps12.dll

Answer 1

Looks like you did not install the Oracle Instant client (or any other version of Oracle Client). This is a prerequisite for unmanaged ODP.NET provider.

Install the Oracle Instant client and you are fine. Otherwise you will get nothing but trouble.

Answer 2

I experienced similar problem; install oracle data access components (odac ODTwithODAC122010.zip) for solution.

Answer 3

I managed to make it work.

• Download the good version of the ODAC that will target your project.

  1. For a 32bit project you need to download the ODAC12..._x32.zip (ODAC121021Xcopy_32bit.zip).

  2. For the 64bit project you need to download the ODAC12..._x64.zip

• Unzip it in an empty folder depending on the version you want (32bit vs 64bit).

• Locate in the instantclient_12_1 folder all the dlls by searching *.dll in the windows search bar. You need to grab:

1. oci.dll

2. ociw32.dll

3. orannzsbb12.dll

4. oraociei12.dll

5. oraons.dll

• Locate in the odp.net4 or odp.net20 folder depending on your .NET version this two dlls:

1. OraOps12.dll

2. Oracle.DataAccess.dll

• Copy the those 32bit dlls or 64bit dlls and put them directly in the Output path of your project. For example in C:\...\vsProjects\BulkInsert\BulkInsert\bin\Debug.

• Browse Oracle.DataAccess.dll in your project by pointing on the Output path.