I'm trying to connect to IBM DB2 database with C# application. At first I've installed IBM Data Server Driver Package, which, according to the documentation is for applications using ODBC, CLI, .NET, OLE DB, PHP, Ruby, JDBC, or SQLJ, use IBM Data Server Driver Package. Then I thought I could use IBM.Data.DB2 assembly and happily connect. It didn't work at all, as the app kept crashing while looking for db2app.dll in its current working directory.
Then I installed IBM Data Server Client, which has this dll in "bin" directory, which I added to system path. That didn't help, so I copied it to my app's build directory, and it now works. But I don't think that is correct, as I also had to copy msg\en_US\db2nmp.xml file to my build directory to get exception error texts.
I think it's wrong to copy all these files from DB2 installation, and I should somehow be able to force IBM.Data.DB2 assembly to look for its required files in the system path, not in its working directory. I also think that Data Server Driver Package should be enough, but I wasn't able to do anything with IBM.Data.DB2.dll until I installed the larger Data Server Client.
I assume that the problem is on my end, not with IBM, so I'm doing something obviously or subtly wrong.
My question is: How do I use the smaller IBM Data Server Driver Package with .NET application?
I think you are looking for this information that is available in DB2 manual:
http://pic.dhe.ibm.com/infocenter/db2luw/v9r7/topic/com.ibm.swg.im.dbclient.adonet.doc/doc/c0010960.html
And perhaps this helps also:
http://www.ibm.com/developerworks/wikis/display/DB2/DB2%20and%20.NET%20FAQs#DB2and.NETFAQs-WherecanIfindtheDB2.NETproviderandVSAddins%3F
In general, I think you should've installed IBM Database Add-Ins for Visual Studio from here(Requires IBM Registration):
https://www14.software.ibm.com/webapp/iwm/web/preLogin.do?source=swg-daivs
Related
I have a c# console application which is scheduled to import bulk data from oracle to sql database. I am leaning towards using the oracle client dlls from the installation folder instead of having it installed on server. I read many existing SO answers on copying required dlls in installation folder.
https://jeremybranham.wordpress.com/2011/04/25/oracle-instant-client-with-odp-net/
The application works fine on my windows 10 machine where no oracle client is installed. But on Windows Server 2008 R2 it throws error saying OraOps12.dll is not found. Though I have the dll available. What can I do to troubleshoot the issue?
Make sure the dll is referenced in the project and it's set to copy to the output directory. I can't explain why, but I have had referenced dll's not set to copy and have run into similar issues as you are describing.
I think it is a bad idea to copy the DLL's from the Oracle Client manually. You may provide a copy of Oracle.DataAccess.dll - for all the rest ask your customer to install an appropriate Oracle Client, i.e. the version and architecture has to match the Oracle.DataAccess.dll.
Or use the ODP.NET Managed Driver (Oracle.ManagedDataAccess.dll), this is a stand-alone DLL which does not require any additional file.
Finally I could work it out without actually installing Oracle Client on the server. I was receiving error about not able to load OraOps12.dll but eventually I found out that the dll I was missing was msvcr120.dll. The dll is Microsoft Visual C++ Runtime. So now, I have following Oracle dlls in my deployment folder & the application is working. No changes in configuration are required.
msvcr120.dll
Oracle.DataAccess.dll
OraOps12.dll
oraociei12.dll
oraons.dll
oci.dll
I have oracle 10g client(full) and 11g instant client installed on my machine.
I am trying to use ODP.NET 12c. Here is what I did.
Added Oracle.DataAccess.dll to References.
Copied OraOps12.dll to the folder where my executable is.
When running I got "Unable to load DLL 'OraOps12.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)".
I think it could be due to dependency issue. So I further copied 12c's
oci.dll
oraociei12.dll
orannzsbb12.dll
I then still got other dependency errors. I don't want to copy the whole InstantClient though.
My goal is to get the app to work with other versions of Oracle client.
Our customers have different version of Oracle client installed. So any way to get the app (ODAC12c) work with customers' current version of Oracle client without having to install 12c client?
Thanks,
Update:
I forgot to mention a few things
my ODAC is 32bit and I compiled my app on x86.
I didn't use Oracle.ManagedDataAccess.dll because it does not include BULKCOPY classs. If anyone knows a version of Oracle.ManagedDataAccess.dll that includes bulkcopy class please let me know.
Our customers already has different versions of Oracle client installed for other apps and they don't want to change their environment just for this new app. So my goal becomes to make one version of ODAC in my app work with different versions of existing Oracle client (each customer environment is different). Is this possible and if yes, how?
You know, I just spent 5 minutes looking for the guy that I remember attempting this before...and it turned out to be you shawn ;).
Honestly, to rely on what the client has installed is a crap-shoot. I would use the full xcopy package, get it working, and then work backwards, deleting what is not needed.
Don't run the install.bat that comes with it. Doing so adds registry entries that aid in locating the unmanaged binaries, but you also risk messing with a client installed copy.
Drop the whole xcopy install into your app's folder as a subfolder.
Instead, set the DllPath to this new subfolder
Example:
<oracle.dataaccess.client>
<settings>
<add name="DllPath" value="C:\app\user\product\11.1.0\client_1\BIN"/>
Then set the Oracle_Home environment variable
Example:
Environment.SetEnvironmentVariable("ORACLE_HOME", #"C:\app\user\product\11.1.0\client_1\");
This article does something similar:
http://dbaportal.eu/2013/02/22/true-xcopy-runtime-for-oracle-odp-net-application/
He even adds a policy to redirect in case he has referenced projects that reference a particular version of Oracle.DataAccess.dll
He adds his oracle home with a batch file though. The part I'm not so sure of is that he also adds his new xcopy install to the path with that same batch file. DllPath should take care of that, but if I'm wrong, you can also do that at runtime:
Environment.SetEnvironmentVariable("PATH", #"C:\app\user\product\11.1.0\client_1\BIN");
From here, I'd setup some basic unit tests using all the ODP.net functionality you are using and get some positive tests and then work backwards - start deleting what you don't need, running your tests each time. You might be able to use sysinternals procexp to show loaded dlls (or procmon to show access to the files). Just loading your tests might be enough to lock the files so you can delete all the ones that aren't locked.
I'm not sure doing this is supported. Then again Oracle does list "the current application's directory" in the unmanaged search order so they didn't close the door either.
EDIT:
Found one of the links of other people doing this:
http://alderprogs.blogspot.com/2009/04/deploying-odpnet-with-oracle-instant.html
I'm not sure why but they download the instant client separately (it's already part of the xcopy package).
EDIT 4/15/2016: If you're reading this these days note two things. 1) I don't think setting the environment variables are necessary if you are already setting DllPath. 2) I don't think this is worth doing when the managed provider now only requires one or two dlls.
It's a bad idea to copy single DLL's to different directories and hope it will work.
In general ODP.NET provider works only together with corresponding Oracle Client, i.e. in order to use ODP.NET 12 you must also install Oracle Client 12. Same applies for version 11 or 10.
Only exception is the ODP.NET Managed Driver, there you need only a single DLL (Oracle.ManagedDataAccess.dll).
Furthermore the architecture (32 bit vs. 64 bit) has to match.
In case you use OLEDB provider it's even not possible to have more than one provider installed (for each architecture) - unless you hack your system by manipulating PATH variable and Registry all the time.
My proposal would be: Remove all Oracle Clients from your machine and install only one (or one per architecture) Oracle Client properly. It's very unlikely that an application works with one Oracle Client version only. It is also a good approach to install both 32bit and 64bit on one machine, follow this instruction to do it: Install Oracle x86 and X64 on one machine
In case you really need to test your application with different Oracle Client version, setup a couple of test-PC (maybe in a Virtual-Box) each with a different Client version. Otherwise it will be very challenging to handle it.
Update:
I think each (Unmanaged) ODP.NET version works only with according version of Oracle Client. Maybe by chance there are some combinations which work out but in general the versions should match.
I see two different solutions:
(1) Ask your client to install his Oracle Client including ODP.NET. He can choose the version, only the architecture (32 bit or 64 bit) has to match. Then you don't supply any ODP.NET with your application.
In your *.csproj, resp. *.vbproj file define your reference like this:
<Reference Include="Oracle.DataAccess">
<SpecificVersion>False</SpecificVersion>
<Private>False</Private>
</Reference>
Attributes like Version=... or processorArchitecture=... are not required. Then your application should run with any Oracle/ODP.NET version.
Your customer can download ODP.NET provider from here: Oracle Data Access Components (ODAC) for Windows Downloads and install it on top of existing Oracle Client installation. In readme.txt it says "The files of this zip file is NOT to be installed on top of an existing
Oracle Universal Installer (OUI) based Oracle Home installation.", however I don't see any reason why not doing it. It works well, you just have to carefully provide correct folder for existing Oracle installation and correct ORACLE_HOME name and do not install dependencies.
(2) In your setup script/exe determine the Version of customer installed Oracle Client and copy according ODP.NET to customer machine.
In order to determine version of Oracle Client you can to search for file oci.dll in folders provided by PATH environment. oci.dll is a normal .NET assembly, so you can read out the version easily.
For a proper installation of ODP.NET follow the file configure.bat which is part of downloaded ODP.NET XCopy version. In my opinion this batch file is easy to understand.
Basically it does
1 - Copy file Oracle.DataAccess.dll to target machine
2 - Copy different resource files *\Oracle.DataAccess.resources.dll to target machen
3 - Add these DLL's to the GAC. This can be done by gacutil.exe or OraProvCfg.exe (included in downloader ZIP file) or your setup application provides this operation.
4 - Make a few Regristy entries. Newer ODP.NET versions write/read into HKLM\SOFTWARE\Wow6432Node\Oracle\ODP.NET (for 32 bit), resp. HKLM\SOFTWARE\Oracle\ODP.NET (for 64 bit). Older ODP.NET versions use HKLM\SOFTWARE\Oracle\KEY_{ORACLE_HOME_KEY}\ODP.NET\ (for 64 bit), resp HKLM\SOFTWARE\Wow6432Node\Oracle\KEY_{ORACLE_HOME_KEY}\ODP.NET\ (for 32 bit) instead
That's it, you should be able to include this in your setup.
I have made a desktop app Setup that connects with remote Oracle 10g Database. When I install Setup on remote machine and run my application then I get following error:
system.data.oracleclient requires oracle client software version 8.1.7 or greater
It works well on my Development machine.
It is a security issue, so to fix it simply do the following:
Go to the Oracle Client folder.
Right Click on the folder.
On security Tab, Add "Authenticated Users" and give this account Read & Execute permission.
Apply this security for all folders, Subfolders and Files (IMPORTANT).
Don't Forget to REBOOT your Machine; if you forgot to do this you will still face the same problem unless you restart your machine.
http://blogs.msdn.com/b/fabdulwahab/archive/2011/11/13/system-data-oracleclient-requires-oracle-client-software-version-8-1-7-or-greater.aspx
The error message is pretty self-explanatory: your application needs the Oracle Client installed on the machine it's running on. Your development PC already has it. Make sure your target PC has it, too.
Edit: The System.Data.OracleClient namespace is deprecated. Make sure you use the driver native to your database system, that would be ODP.NET from Oracle.
Install Nuget for Oracle.ManagedDataAccess
Make sure you are using header for Oracle:
using Oracle.ManagedDataAccess.Client;
This Worked for me.
On your remote machine, System.Data.OracleClient need access to some of the oracle dll which are not part of .Net. Solutions:
Install Oracle Client , and add bin location to Path environment varaible of windows
OR
Copy
oraociicus10.dll (Basic-Lite version) or aociei10.dll (Basic version),
oci.dll, orannzsbb10.dll and oraocci10.dll from oracle client installable folder to bin folder of application so that application is able to find required dll
On your local machine most probably path to Oracle Client is already added in Path environment variable to there required dll are available to application but not on remote machine
If you have to use the older client, here is my experience.
We are running a 32bit server so the development machines run the 32bit client. We run the 11.1 install, 11.2 gets the error. Once you have installed the 11.2 version you have to manually delete the files Oracle.Web.dll and System.Data.OracleClient.dll from the %windir%\Microsoft.NET\Framework\v2.0.50727, reinstall 11.1, then register the dlls with gacutil.exe.
This fixed the issue with my systems.
Go to C:\app\insolution\product\11.2.0\client_1\BIN and find oci.dll. Right click on it -->Properties -->Under Security tab, click on Edit -->Then Click on Add Button --> Here add two new users with names IUSR and IIS_IUSRS and give them full controls. That's it.
After installation of Oracle Client 11.02.04, reboot the server and make sure USERS(Local Computer) is added with Full Control on Root folder for eg WWW
Tested, it worked.
This posting is about mostly desktops and this oracle message. I want to talk about server class machines running a dtexec that are throwing this error message. In one case it meant that an installed oracle client instance on a server machine was no longer there, and it had been there for a long time. On the client side we found recently 1/2023 that certain versions of the oracle client 32 bit don't run on a laptop with AMD chips. Downgrading to a lower version of the oracle client 19.x fixed the problem.
I am building an application which needs to connect to a central MySQL database. The application is written in C#. I have installed the .NET connector from MySQL for the VS integration.
I was wondering if there is anything special I need to do to be able to have my application be portable and not require an install of the connector on every machine it is used on?
There is a similar question I found here on SO, but it is for a server instead instead of client which is very different.
Edit:
Connector I used: .NET connector 6.2.3 (
http://www.mysql.com/downloads/connector/net/)
When you make an installer, you can include the dll for the mysql connecter such that it is copied along with the other side. This way, whenever the application is installed properly, you wont have the problem.
I am using System.data.odbc with "Driver={MySQL ODBC 5.1 Driver}" in the connection string. However, I have not realised there is MySQL connector installed on my PC so however I have not referenced it, it doesn work without it.
Now I need to distribute it embed in the app. I have downloaded MySQL Connector/ODBC 5.1 files, but with Add reference it says "The file is not accessible...make sure its valid COM.." etc.
Thank you
MySQL Connector/ODBC is, as the name suggests, just an ODBC driver for connecting to MySQL. It's not specifically designed for .NET and you can't embed it in your .NET applications in any way. It will need separate installation on any machine where you need to use it.
MySQL Connector/Net is a fully managed ADO.NET provider for MySQL. It's tailor-made for .NET and doesn't require the installation of any other software. It's easy to reference and distribute in your .NET applications, you'll just need to use the System.Data.MySqlClient namespace and objects rather than System.Data.Odbc.
You can embed the .NET DLL, but not the driver itself. You'll need to install MySQL Connector on every computer that runs your application.
The only thing u need is Mysql.Data.Dll
You don't need to install the complete connector, everything u need is in there.
That also counts for the end user, they also only need the dll