I am on a Windows 8.1 x64 machine and trying to connect to my locally installed Oracle 11g database through an ASP.NET WebForms 4 application that I am running from Visual Studio 2013 and IIS Express.
I downloaded ODP.NET from this NuGet package. But I keep getting the error Could not load file or assembly or one of its dependencies. An attempt was made to load a program with an incorrect format.
Someone please help me troubleshoot this problem. There so little source code and sample out there regarding Oracle and .NET that is up to date.
This usually happens when referencing an assembly that is either 32-bit from a 64-bit application or the inverse. Please make sure you're WebForm project is targeting the same platform as the referenced Oracle assembly.
Quote from the page you downloaded your Oracle.DataAccess.dll:
Oracle will still need to be installed on the production or development machine in order to connect to Oracle (those libraries are greater than 100MB in size, so it didn't make sense to include them in a NuGet package), but this package will at least allow the project to be successfully built
So now you can only build your code, not run it. To run it you should get: 64-bit ODAC 11.2 Release 5 (11.2.0.3.20) for Windows x64 from this Oracle page: http://www.oracle.com/technetwork/database/windows/downloads/index-090165.html
Your ASP.NET if installed so after your download and install it run command like this:
C:\oracle\product\11.2.0\client_1\odp.net\bin\4> OraProvCfg /action:gac /providerpath:"C:\oracle\product\11.2.0\client_1\odp.net\bin\4\Oracle.DataAccess.dll"
(assuming your install directory will be C:\oracle\product\11.2.0\client_1\)
Related
I'm a fullstack developer and I had the setup where my main development machine was an Intel MacBook for frontend iOS/Android app development, with Windows 10 running in a Parallels VM, with Visual Studio installed for my .NET (Standard) backend. Everything was running fine with this setup.
I've just moved to an M1 MacBook and since I couldn't use Windows 10 x64 anymore, I've setup Windows 11 ARM version, and installed Visual Studio 2022 in it. Visual Studio works perfectly under x64 emulation, but some code in my C# projects have Entity Framework dependencies for custom SQL Server types (spatial types), which have x86/x64 DLLs available (the package was last updated on 2018 and I couldn't find any ARM64 versions). Even though x64 emulation works great when running apps like Visual Studio itself, for some reason I'm getting the following error when I'm building a project which depend on SQL Server Types:
Error Could not copy the file "C:\Users\can\source\repos\MyProjectNameRedacted\SqlServerTypes\x86\SqlServerSpatial140.dll" because it was not found.
Error Could not copy the file "C:\Users\can\source\repos\MyProjectNameRedacted\SqlServerTypes\x64\SqlServerSpatial140.dll" because it was not found.
Error Could not copy the file "C:\Users\can\source\repos\MyProjectNameRedacted\SqlServerTypes\x86\msvcr120.dll" because it was not found.
Error Could not copy the file "C:\Users\can\source\repos\MyProjectNameRedacted\SqlServerTypes\x64\msvcr120.dll" because it was not found.
How can I solve this?
The problem was simpler and more obvious than anything to do with ARM64 or emulation.
I've cloned my repo from Git, and my .gitignore simply was ignoring DLL files as all the DLLs except these particular files were just build outputs. When I cloned the repo, DLLs were simply not there, and build was expecting those DLLs, resulting in error. I've reinstalled the package using NuGet using the following command and the problem was solved:
Install-Package Microsoft.SqlServer.Types -Version 14.0.1016.290 -project Models
I have two applications developed in C# .NET that attacks against an Oracle 10g Database, now the client is planning to upgrade the database to an Oracle 18c. One of the applications is a web application and the other is a desktop application. At this moment I am using Oracle.DataAccess.dll and it is working properly. Will my applications keep working properly after the upgrade or should I recompile my applications with another dll?
It depends on the version of your Oracle.DataAccess.dll. You did not tell us, so please have a look at Client / Server Interoperability Support Matrix for Different Oracle Versions (Doc ID 207303.1)
If your Database is 10.2.0 then Oracle.DataAccess.dll version 11.2 and 12.1 should work, otherwise you have to upgrade your Oracle Client.
Note, version of Oracle.DataAccess.dll has to match exactly the Oracle Client. Installing more than one Oracle Client can be a challenge, better remove old versions completely before you install new one.
In case you will install Oracle Client 12.2 or newer have a look at this: SSMA unable to find specified provider
Usually you don't have to recompile your application. If Oracle.DataAccess.dll is defined in GAC then your application will automatically load the correct version of Oracle.DataAccess.dll driven by GAC Policies.
I am using 64bit Oracle.DataAccess.dll (64-bit ODAC 11.2 Release 6 (11.2.0.4.0) Xcopy for Windows x64). Downloaded this package ODAC112040Xcopy_64bit.zip from
http://www.oracle.com/technetwork/database/windows/downloads/index-090165.html.
I want to connect to Oracle 11g Database using the provider dll. I was able to install it successfully. However, when I use the dll in my Asp.net code, I am getting following error.
Exception Details: System.IO.FileNotFoundException: Could not load file or assembly 'Oracle.DataAccess, Version=2.112.4.0, Culture=neutral, PublicKeyToken=89b483f429c47342' or one of its dependencies. The system cannot find the file specified.
My system is a Windows 7, 64bit machine. Using Visual Studio 2015. Even before the program execution reaches the function calls of Oracle.DataAccess.dll, I get this error as soon as the page loads.
Have seen many blogs with answers saying, 64-bit dll being used on 32-bit machine or 32-bit enabled IIS Website etc. My requirement is, need only 64bit dll to be executed on 64bit machine.
Please let me know how to fix the issue.
The error message says it is looking for Version=2.112.4.0, which is for .net 2 (and 3). The title of your post mentions .net 4.6, so you should be targeting Version=4.112.4.0 in your visual studio project
I am new to C# and SQL Server databases, so this may be a stupid question but I am confused.
I want to setup an embedded database on a client machine automatically when he installs my application. I know SQL Server Compact Edition is there but there are so many restrictions in SQL Server CE.
Can I use .mdf files as an embedded database? If yes then how can I setup it on client machine automatically? or is there any other option to solve my problem?
I would recommended to use SQLite. It is simpler to deploy. Also, SQL Server Compact appears to be discontinued.
Is SQL Server Compact discontinued from Visual Studio 2013?
You can use SQLite which doesn't require any installation on the client machine.
SQLite depends on the Visual C++ runtime, but you don't need to install it on the client machine. The system.data.sqlite download page contains several "static" packages that already contain the runtime.
All the "static" packages contain either native or mixed-mode assembly
binaries linked statically to the appropriate version of the Visual
C++ runtime. Typically, these packages are used in cases where
customer machines may not have the necessary version of the Visual C++
runtime installed and it cannot be installed due to limited
privileges.
For example, on my machine I am running Windows 8.1 x64 so I went under Precompiled Statically-Linked Binaries for 64-bit Windows (.NET Framework 4.0) and downloaded sqlite-netFx40-static-binary-x64-2010-1.0.90.0.zip.
This binary package contains all the binaries for the x64 version of
the System.Data.SQLite 1.0.90.0 (3.8.2) package. The Visual C++ 2010
SP1 runtime for x64 is statically linked. The .NET Framework 4.0 is
required.
I then unzipped the package and ran test.exe to make sure everything works. Zero installation required.
First of all, I want so say I read the other questions and none of them helped me.
The server where I'm getting this error is a Windows 2003 SP2 + .net framework 4.0 + Oracle i9 client
I have downloaded the latest ODP.NET ODAC1120320Xcopy_32bit.zip a copied these dll out.
oci.dll
ociw32.dll
Oracle.DataAccess.dll
orannzsbb11.dll
oraocci11.dll
oraociei11.dll
OraOps11w.dll
I've created a little app which just connects to an oracle. link
And when I run this app I'm getting the The provider is not compatible with the version of Oracle client error.
On the download page was also written : Each 32-bit ODAC client download below supports connectivity to Oracle Database versions 9.2, 10.1, 10.2, and 11.1, and 11.2.
So I guess I should be fine with my 9i database.
I'm not sure if I should use some older ODP.NET version. One answer here on SO sugested to use version 11.1.0.6.20 which supports the .NET 2.0 but my application is written against .NET 4.0.
What can I do ?
I'm unaware of any supported method of running an oracle client without some sort of install (the xcopy version includes a batch file for installation so the "xcopy" is a bit of a misnomer.
That said, if you're going to do something that's unsupported, you might as well go with something that WILL eventually be supported - the 100% managed provider (meaning no extra unmanaged dlls to copy) is currently in beta:
http://www.oracle.com/technetwork/database/windows/downloads/odpmbeta-1696432.html
I am suborn to see something to the end even for just the learning experience so I'd understand if you wanted to see your current way to fruition. The oracle documentation does indicate that the application directory is in fact first in the unmanaged dll search order. My guess is that additional dlls are needed (you are using a newer version than your linked article). I would see which specific dlls it's loading from outside of your app directory using a tool like Process Monitor and see if you can find the equivalents from the new ODAC to copy over.