I have designed a C# application to connect to Oracle Database and change schema users passwords. My reference assembly is System.Data.OracleClient from the location: "C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5\System.Data.OracleClient.dll"
The platform that I used to design/test the application looks like this:
1. 64 bit Windows 7 platform.
2. 32 bit .Net Frameworkv4.5
3. 32 bit Oracle 10g Client.
I need this application to run for 64 bit Oracle Client too. But when I transfer my binaries to a machine which has 64 bit Oracle 11g installed, I get this error: "Attempt to load Oracle client libraries threw BadImageFormatException. This problem will occur when running in 64 bit mode with the 32 bit Oracle client components installed."
I am not sure how to work around this issue. Please suggest if I need to make any code changes or assembly reference. I read through a lot of similar forums but could not find anything helpful. Please help!
First of all, provider System.Data.OracleClient is deprecated. Microsoft is not supporting it anymore, you should consider to use the Oracle provider Oracle.DataAccess or Oracle.ManagedDataAccess.
My recommondation is to install both, 32-bit and 64-bit Oracle Client on your developing machine, then you can test and build anything. Here is an instruction how to do this: Install x86 and x64 Oracle Client on one machine
An x86 Oracle client can connect to a 64 bit Oracle Database, vice versa is also no problem.
I had the same issue on a Windows 10 PC. I copied the project from my old computer to the new one, both 64 bits, and I installed the Oracle Client 64 bit on the new machine. I got the same error message, but after trying many solutions to no effect, what actually worked for me was this:
In your Visual Studio (mine is 2017) go to
Tools > Options > Projects and Solutions > Web Projects
On that page, check the option that says: Use the 64 bit version of IIS Express for Websites and Projects
Try this:
Open Oracle Net Configuration Assistant
Select radio button option at Local Net Service Name Configuration, then click Next
Select radio button option at Reconfigure, then click next
Select net service name you want to reconfigure, either ORACLR_CONNECTION_DATA or ORCL, then click Next
input your Service Name, if your service name of installed oracle as ORCL, then write ORCL to the field, then click Next
select the protocol you want to use, for example, select TCP, then click Next
input hostname where your oracle database engine (service) installed, for example, installed on your desktop or notebook,
then fill as localhost, and fill your port number (select option Use the Standar port number of 1521) or if use other port, fill the port number
Then click next.
select Yes perform test,
if necessary, change user logon
then click next
if no configure another net service name, select No and then click next
you should download, extract and install the ODTwithODAC183.zip and BuildTools_Full.exe if you want use to connect on .net framework from MS Visual Studio
Related
I have visual studio 2013 and oracle 11g
When I try to connect to the database I get the next errror:
"Attempt to load Oracle client libraries threw BadImageFormatException.
This problem will occur when running in 64 bit mode with the 32 bit
Oracle client compoonents installed."
I know there is an issue between the 64 bit visual studio and 32 bit Oracle client. But I am looking for a solution the whole day now and I can only find outdated posts on the internet about older versions.
I already tried to select "platform target: x86" in the build settings.
I also looked for a 64 bit version of the oracle client but that also failed a couple of times.
I Appreciate every help because I need this connection for a very important school project.
Thanks for your time!
you need install 64 bit oracle client
link: Instant Client Downloads for Microsoft Windows (x64)
instantclient-basiclite-windows.x64-11.2.0.4.0.zip (23,504,640 bytes)
as they said about installation
Installation Steps:
Download the appropriate Instant Client packages for your platform. All installations REQUIRE the Basic package.
Unzip the packages into a single directory such as "instantclient".
Set the library loading path in your environment to the directory in Step 2 ("instantclient"). On many UNIX platforms, LD_LIBRARY_PATH
is the appropriate environment variable. On Windows, PATH should be
used.
Start your application and enjoy.
So I'm having a problem publishing my WebApp. I have set all the projects to AnyCPU in Configuration Manager. I was using a 32 bit version of Oracle.DataAccess.dll in my DAL but I need to use a 64 bit version for the server. The server is running a 64 bit version of Oracle.
Unfortunately when I put the 64 bit version of the dll in my project and rebuild it throws an error.
Could not load file or assembly 'Oracle.DataAccess' or one of its dependencies. An attempt was made to load a program with an incorrect format.
Any ideas would be greatly appreciated. I have been working on this one problem for a few days now and haven't been able to find help.
Oh also! I could actually publish before and it push the 32 bit version of the Oracle dll even though I had the 64 bit version in my DAL. I ended up removing the 32 bit version of Oracle off my computer so that wouldn't happen. But any ideas why it did that?
The fix from brandonbanks worked until installing oracle client 12c r2 (64bit). After install Visual Studio would not load oracle data access dll (same error as listed).
Previous oracle client was 12c r1 (64bit) but I needed oracle client r2. The new r2 oracle client broke ability to build asp.net project in visual studio.
The fix was to uninstall all oracle, followed by full clean (remove oracle from registry plus left behind oracle files). Then compile worked fine. Didn't need to change anything Visual studio side. Also didn't need to reinstall oracle Client for compile and publish to start working again (just need the 12c r2 oracle 64 bit data access dll).
Can then reinstall other oracle clients but if also installing 32bit client suggest doing 64bit client last.
Found out it was a problem with the compiling process in Visual Studio.
I added this line to the publish profile in the App_Data folder.
<AspnetCompilerPath>C:\Windows\Microsoft.NET\Framework64\v4.0.30319</AspnetCompilerPath>
Also had to change my IIS to 64 bit. I used this cmd script.
reg add HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\12.0\WebProjects /v Use64BitIISExpress /t REG_DWORD /d 1
Hope this helps anyone out there who has a similar problem.
I am new to Databases and .net!
I have SQL developer 3.0 installed through which I can connect to the Oracle 11g Database server.
The requirement is to write a C# program to connect to the oracle database and run query; in my visual studio 2013 project I have added a reference to Oracle.DataAccess.Client and written the code, however while debugging an error occurs that says "Ora-12541:TNS:No-Listener".
My question for now is, Do I need to install an Oracle client (64-bit ODAC 11.2 Release 6 (11.2.0.4.0) Xcopy for Windows x64 ?), my assumption was SQL developer will take care of this!
Please help!
SQL Developer has it's own Oracle drivers (JDBC as far as I know), thus you must install Oracle Client in order to connect to an Oracle DB in Visual Studio.
Note, "ODAC" contains only the ODP.NET Data Provider (i.e. mainly the Oracle.DataAccess.dll file). In order to use it, you must install the actual Oracle Client - at least the Instant Client (which is also included in the ODAC Download file).
Consider to use the ODP.NET Managed Driver, then you need only one single DLL, nothing else. It can be downloaded from Oracle page 64-bit Oracle Data Access Components (ODAC) Downloads and works for both 32bit and 64bit applications.
Unless you copied Oracle.DataAccess.dll from another machine, all oracle packages that include it, also include some version of the client. ODAC includes the full version while the xcopy installs have the instant client. I'll also point to the managed provider though for simplicity as it does not have any unmanaged dependencies,
However, if you got all the way to an "ora-xxxxx" error, it sounds like your Oracle client is correctly installed. The only issue you have now is your connection string. If you normally use a TNS name in Sql Developer, than you either need to copy your existing tnsnames.ora to network/admin in your new oracle home dir, or you need to set a TNS_ADMIN system environment variable to point to your existing one. There are other options too, but your error in this case is tns specific.
I just migrated from XP to Win 7. I am guessing this error has to do with switching operating systems. I wrote a .net application that basically massages a large amount of data and then connects to a database and inserts/updates a table.
When I hit a button to connect to the database I run into the error regarding the oracle provider not being registered on my local machine.
A clear, step by step outline of how I can fix this quickly would be much appreciated.
The exact error message is:
'OraOLEDB.Oracle.1' provider is not registered on the local machine
I had the same issue after installing the 64 bit Oracle client on Windows 7 64 bit. The solution that worked for me:
Open a command prompt in administrator mode
cd \oracle\product\11.2.0\client_64\BIN
c:\Windows\system32\regsvr32.exe OraOLEDB11.dll
I had the same issue using IIS.
Make sure the option 'Enable 32bit Applications' is set to true on Advanced Configuration of the Application Pool.
Right Click on My Computer
Click on properties
Click on Advanced System Settings
Click on "Environment Variables" button.
In the system Variable section find the "PATH" variable
Edit the "PATH" variable and add Oracle installation path to it (from your local machine) like ;C:\oracle\product\10.2.0\client_1\bin
Do the following test:
Open a Command Prompt and type:
tnsping instance_name
where instance_name is the name of the instance you want to connect (if it's a XE database, use "tnsping xe"
If it returns ok, follow steps of Der Wolf's answer. If doesn't return ok, follow steps of Annjawn's answer.
It solved for me in both cases.
If you have windows 64 bits, try to install oracle driver 32 bits first then 64 bits driver, thats what i do and is working
It only worked for me after I changed the 'Platform target' to 'x64' (considering I'm using Oracle 12c 64 bits)
To do that, I did:
Right click on the project name (at the Solution Explorer panel locate, in general, at the left)
Clicked on 'Build' (in the new opened window)
Changed the 'Platform target' from 'Any CPU' to 'x64'
That solved the problem.
I had the same issue but my solution was to keep the Platform target as Any CPU and UNCHECK Prefer 32-bit checkbox. After I unchecked it I was able to open a connection with the provider.
After spend hours to fix that; and for some who installed it uncorrectly, you need to uninstall current version and reinstall it again as Administrator
just check for which architecture you installed the driver
open Powershell both in 32 and 64 (seperate instance) and fire up:
# OLEDB-drivers
(New-Object System.Data.OleDb.OleDbEnumerator).GetElements() | select SOURCES_NAME, SOURCES_DESCRIPTION
# ODBC-drivers
Get-OdbcDriver | select Name,Platform
If you are getting this in a C# projet, check if you are running in 64-bit or 32-bit mode with the following code:
if (IntPtr.Size == 4)
{
Console.WriteLine("This is 32-Bit!");
}
else if (IntPtr.Size == 8)
{
Console.WriteLine("This is 64 Bit!");
}
If you find that you are running in 64-Bit mode, you may want to try switching to 32-Bit (or vice versa). You can follow this guide to force your application to run as 64 or 32 bit (X64 and X86 respectively). You have to make sure that Platform Target in your project properties is not set to Any CPU and that it is explicitley set.
Switching that option from Any CPU to X86 resolved my error and I was able to connect to the Oracle provider.
My team would stumble upon this issue every now and then in random machines that we would try to install our platform in (we use oracle drivers 12c ver 12.2.0.4 but we came across this bug with other versions as well)
After quite a bit of experimentation we realized what was wrong:
Said machines would have apps that were using the machine-wide oracle drivers silently locking them and preventing the oracle driver-installer from working its magic when would attempt to upgrade/reinstall said oracle-drivers. The sneakiest "app" would be websites running in IIS and the like because these apps essentially auto-start on reboot. To counter this we do the following:
Disable IIS from starting automagically on restart. Do the same for any other apps/services that auto-start themselves on reboot.
Uninstall any previous Oracle driver and double-check that there are no traces left behind in registry or folders.
Reboot the machine
(Re)Install the Oracle drivers and re-enable IIS and other auto-start apps.
Reboot the machine <- This is vital. Oracle's OLE DB drivers won't work unless you reboot the machine.
If this doesn't work then rinse repeat until the OLE DB drivers work. Hope this helps someone out there struggling to figure out what's going on.
Don't forget to run your cmd as Administrator or you will get the misleading error message :
The module "OraOLEDB12.dll" may not be compatible with the version of Windows that you are running. Check to see if module is compatible with x86 (32 bit) or x64 (64 bit) version of regsvr32.exe
Building on Der Wolfs tip, I uninstalled the Oracle client and installed it again, right-clicking on the setup program, and running it as Administrator. It worked.
If you can't change compile use x64, try uninstall x64 version of odac and install 32bit version. Then, don't forget to add install directory like C:\oracle and also the child directory C:\oracle\bin to the PATH environment variable. This worked out for me in .net 4 application.
I am running into peculiar issue. I am developing a windows based application which connects to Oracle database.
For initial testings, I have created installer and tested on different machines that I have. Each machine has Oracle Client installed and I did not see any problem in running application.
But when I share this installer with customer, he is getting error "Unable to load DLL OraOps10.dll". When asked he mentioned and has shown the Oracle Client installed on his machine and he is able to run other C# applications which connects to Oracle databases.
I do not understand why my application only getting above error. I even tried suggestions shared at https://forums.oracle.com/forums/thread.jspa?threadID=67364 but still no luck.
I even tried copying executables & DLLs manually on customer's machine. But still facing same issue.
So please help me on what else i can do.
Thanks & Best Regards
Sudhakar Chavali
P.S:
I am using Windows XP operating system and customer is also using same operating system. Both machines are of type 32 bit OS only.
This is the location where customer's oracle client installed:
C:\oracle\product\10.2.0\client_1\bin and same is the version in my case too.
We both are using Oracle 10g.
The ODP.NET drivers basically consist of two parts. The .NET part and the native OCI part. The error message indicates that the .NET part is working but fails to load the native part.
These issue are likely causes:
There's a version mismatch between the .NET part and the native part. Note that OraOps10.dll belongs to Oracle 10g. So the .NET part isobviously of version 10, and it is looking for a native part for version 10.
There could be a bitness mismatch. If the .NET part is running in 64 bit mode, it'll be looking for the 64 bit native OCI DLLs. On a 64 bit system, the task manager can tell you whether the process is 32 or 64 bit. 32 bit processes are marked with *32.
The registry might not contain the correct path to the native DLLs. ODP.NET will retrieve the value of HKEY_LOCAL_MACHINE\Software\Oracle\ODP.NET\2.xxx.x.x\DllPath to locate the OCI DLLs. Note that the registry is split into a 32 and 64 bit part. Depending on the process looking into the registry, it'll get different values.
It's best if you add all the available information to your question. Is it a 64 bit operating system? Is it a 32 or 64 bit process? Which version of the Oracle client was installed? What directory was the Oracle client installed? Can you see the correct registry entries?
As for me, I am getting Unable to load DLL "OraOps12.dll" error message.
It is a web application, and I am using Oracle XE. Both the web application (the client app) and the Oracle XE database server is installed on the same machine.
The Oracle XE database server comes with its own Oracle 11 client, but the ASP.NET MVC web app is using Oracle 12 client. Even though I installed Oracle 12 instant client on the machine, the ASP.NET MVC website could not see it, it keeps complaining "Unable to load DLL OraOps12.dll".
What I had to do was edit the registry at HKLM\Software\Oracle\ODP.NET\DllPath to point to the Oracle 12 instant client instead of the Oracle 11 client that gets installed with the Oracle XE.
I will post a more detailed explanation later once I am free.
I suspect that either the entire Oracle client was not installed OR an earlier version was installed.
You should have the customer verify that the version of the Oracle client that is installed matches yours and that the entire client, not just the .Net portion, was installed.
Can you throw some more light on this issue like whether the target OS is 32 or 64 bit. Try to generate the x86 and 64bit installers and check with your clients machine. If not the Oracle client may not be properly installed in the client pc. These issues are a little bit tricky to handle. Try to look at it in other directions.