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.
Related
I've currently used the System.Data.SQLite DLL in a .NET 4.0 x86 WinForms app. This is causing an issue on one of my client's PCs although I cannot reproduce this bug on my system. Both systems are 32bit Windows 7. How do I solve this? Things I've tried:
Installing .NET 4.0 (the app is .NET 4)
Installing all possible VC++ Runtime versions from 2005 to 2012
Installing this particular VC++ Runtime that SQLite needs (fixed a similar issue on my PC)
Adding the useLegacyRuntime attribute in the app.config XML
The error looks wierd because my app is obfuscated. The app works on my 32-bit PC and on my 64-bit development PC. It fails on a client machine. What can I do to solve this error?
In your project, solution explorer expands the Reference section and right click System.Data.SQLite then open properties, in the properties window, make sure copy local is set true . After that rebuild your project and run your client machine again
Turns out my SQLite DLL was outdated. I downloaded the latest from here and rebuilt my app with it. It worked on my PC as well as the client's. I had to install VC++ Runtime 2005 x32 on the Client Machine as well.
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.
I am building ASP.NET application with C# and I want to connect to oracle database.
I have added reference to Oracle.DataAccess in my application on my 64bit Microsoft Window Server 2008 machine.
I also installed ODAC (Oracle Data Access Component) on my machine
and Oracle.DataAccess.dll is also present on this path
C:\Windows\Microsoft.NET\assembly\GAC_64\Oracle.DataAccess
but when i'm trying to connect i encounter following error:
Could not load file or assembly 'Oracle.DataAccess, Version=4.112.3.0, Culture=neutral, PublicKeyToken=89b483f429c47342' or one of its dependencies. The system cannot find the file specified.
As far as I know, the Oracle.DataAccess assembly works only with 32 bits, I also have this kind of problem with 64 bits and it really does not work. My solution was remove the 64bits from GAC and install the 32 bits on GAC. I also remove any .dll file in the bin folder to my application find the assembly on GAC.
There is no problem if your machine and operational system is 64bits, the 32bits version will work fine.
UPDATE
I recommend you take a look at Official Oracle ODP.NET, Managed Driver, that is a better version than Oracle.DataAccess. This Managed Driver does not need the Oracle Client on the machine, and you just need to provide the TNS on the DataSource field of the connection string and it works fine for 32 and 64 bits.
You need to install both x64 and x86 versions of Oracle, because something (I think it was Visual Studio) uses the x86 version when debugging.
In VS2010, I changed the platform target to x64 and this error message disappear.
essentially same error
missing ODP.NET installation components as per last post from me and the other answer participant.
You check the GAC yet?
If you do not see Oracle.xxx folders,
you are not making any headway.
put the correct version and bit of Oracle.DataAccess.dll into the application /BIN folder and make local reference. It solves many problems.
To run your website, you must use IIS since visual studio's development server only runs in 32 bit mode.
In IIS application pool, set your application to run in 64 bit. (The setting is in advanced settings)
To resolve this error, I set my app pool in IIS to allow 32bit applications.
Open up IIS Manager, right click on the app pool, and select Advanced Settings --> set “Enable 32-bit Applications” to True. It's working fine for me.
I got the same exception on a c# console app. What solved it for me is to change the platform target to x86. (project properties => build )
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.
SqlServerCe doesn't seem be supported in .net 4.0. But since I needed an embedded database in my application, I gathered all the necessary 3.5 dlls and included them so that my wpf application could use SqlServerCe as its embedded database.
The application works on my development machine, but now that I've created an installer, and am installing the application on other machines, I keep getting this exception on hose machines:
Unable to load DLL 'sqlceme35.dll': This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem. (Exception from HRESULT: 0x800736B1)
That dll is definitely included in directory where the application is installed. I've even tried copying all related SqlServerCE dlls to the System 32 folder. Nothing I've tried so far has resolved the problem.
Any suggestions?
I just recompiled an app I have that uses SQL Server CE 3.5.1 in .NET 4.0 and it works just fine. Here are a few things to check:
Are you including all of the SQL
Server CE DLLs in your installer?
There are 7, not just 1. The others are native DLLs which are the actual core of SQL Server CE.
SQL
Server CE has x86 and x64 version
DLLs. Are you using the correct
version for the OS you are
installing on?
I resolved my problem by installing:
Microsoft SQL Server Compact 3.5 Service Pack 2 Beta 2 for Windows Desktop:
I solved the problem by installing the Microsoft Visual C++ 2008 Redistributable Package (x86)
In my case the Microsoft.VC90.CRT.manifest from \bin\amd64\Microsoft.VC90.CRT respectively \bin\x86\Microsoft.VC90.CRT was missing. When deploying your solution, it isn't part of the release by default but on some servers it seems to be necessary.