I have started making a C# program on a XP 32bit windows operating system in c# 2008, and now i am trying to open it in Windows 7 64bit operating system. The problem that arises is that i can't run the program in c# 2010 on my 64bit system and it won't go past the Initialize Component(); line in my code. It comes up with an error of, "BadImageFormatException was unhandled" which i think is because of the system change of where i am opening it. Any help on this we be brilliant.
Thanks
The problem you are faced with is that you have compiled the app with Any CPU. Change it to x86 and recompile.
Most likely you have a library you are dependent on which is x86. Because your app is compiled as Any CPU, the Win7 x64 system is loading it as a 64bit app... and failing when trying to load the 32 bit library.
In Build->Configuration Manager, is your Platform set to "Any CPU" for each project?
What is your build profile set to AnyCPU, x86, or x64 there is of course compiling the program on the new machine.
I assume you have all the updates to .NET and Visual Studio on each computer, correct?
Related
This question may be asked so many times. I searched for the solution too much. I got a solution (although that didn't work) to replace some .dll files.
Actually I made an application in Windows 7 Ultimate 64 bit, Visual Studio 2010, target Framework 3.5 with MS Access 2007 Database (Platform target x86). Then I tried to run this application (.exe file) on another machine having Windows 7 Ultimate 32 bit. But the error appeared.
As I got solution to replace those 5 dll files in \Windows\SYSWOW64 folder, but cannot find this folder on 32 machine. Even though I replaced/copied those 5 dlls to System32 folder. But the same error.
I also installed framework 4.0 on the target machine. But the same error.
Now how to resolve this error? Thanks...
Syswow64 is a folder just for 64 bit versions of Windows, where it stores files for 32 bit programs. It shouldn't exist on 32 bit Windows.
Try compiling for 32 bit Windows, then running on the other computer.
Several problems makes this happen (in my case)...
Most important to check for the VIRUSES;
Application is compiled in x64 and running on x86 platform;
If any dll, compiled in x64 platform, added to the x86 application;
These are some of those problems gives the error.
You need to change system target. On menu Build -> Configuration Manager, you can change the platform to x86 instead of x64.
I am beginner in using Microsft.ACE.OLEDB 12.0. I create a Winforms application VS 2010.
And create a function for export data grid data to MS Access file. I using Microsoft Oledb
for export the data grid data to MS Access file.But i get this error when i try to export
the
data to ms access.
Please see the below image.
I also refer the Microsoft.Office 12.0 Object Library in my application.
Batch Build Configuration
The reference to the Access Interop bits has nothing to do with your exception and Access Interop is not necessary to use the classes in the System.Data.OleDb.
The problem arises when you have your application compiled for AnyCPU Platform, you are running on a 64bit system and the installed ADO.NET provider (Microsoft ACE.OLEDB.12.0) is the 32bit version.
When using the AnyCpu target Platform your code will be executed as 64bit code on 64bit systems and as 32bit code on 32bit systems. An application executed as 64bit cannot use 32bit drivers (and viceversa). Now add to the mix the fact that Microsoft.ACE.OLEDB.12.0 has two different versions. One for 64bit and and one for 32bit and they cannot be installed together on the same machine.
The simplest workaround is to change the Target Platform of your application through Visual Studio menu
BUILD -> Configuration Manager -> Active Solution Platform -> x86
If the x86 option is not already there, then select NEW, name it x86, Copy Settings from AnyCPU and check Create new project platforms
If you think that using a 32bit app on a 64bit Operating System is a loss of performance or something to be avoided then think twice and read this reference where the PRO and CONS of AnyCpu are critically examined. If you don't have a specific reason to use AnyCpu it is better to stay with x86.
Of course, another option is to deinstall the 32bit version and install the 64bit version of ACE from here and then run you application as AnyCpu on 64bit systems. But this could be a nightmare for your deployment scenarios. What if Microsoft Office 32bit version is installed on your x64 target machine? Office installs its bit compatible version of ACE and, as said, it is not possible to have 32bit and 64bit of ACE installed on the same machine.
Now you should also ask your customer to reinstall Office as 64bit to keep your 64bit app happy.
UPDATE
The situation has changed a bit with the newest versions of Visual Studio. There is now a new option that is the default for new projects. It is called AnyCPU Prefer 32bit mode. More details at this link: What AnyCPU Really Means As Of .NET 4.5 and Visual Studio 11 and another interesting post (albeit regarding Sql Server Compact) is this one The trouble with Any CPU–Prefer 32 bit–BadImageFormatException
Change in its App pool 'advanced settings' to allow to run 32-bit programs... that did it for me.
I have similar issue when we are reading Excel file.
History of the problem:
We recently migrated our application from 32-bit to 64-bit because of the memory requirement. For that we migrated our windows 7 from 32-bit to 64-bit. But still we installed 32-bit office on our machines.
because, of this we had this issue while importing Excel data into application.
Solution,
I downloaded 64-bit version of the http://www.microsoft.com/en-us/download/details.aspx?id=13255 and installed with argument as,
AccessDatabaseEngine_x64.exe /passive
Without any code change my issue get resolved.
Note:
On 64-bit OS and 64-bit office, my functionality was working fine without this fix. This fix is only required while our application is 64-bit running on 64-bit OS which is having 32-bit office installed on it.
Base way:
Application : MVC C#,
For Win Server 64 bit:
Remove all office 32 bit installed.
Download link: https://www.microsoft.com/en-us/download/details.aspx?id=13255
select download 64 bit and then install it to server(If you can't setup program. Please re-check 1 point).
retry access your application again.enter image description here
for me installing Microsoft Access Database Engine 2010 Redistributable fixed the problem, the 32 bit version.
In my case
Download link: https://www.microsoft.com/en-us/download/details.aspx?id=13255
Select download 32 bit and then install it to server(Even if your server is 64-bit)
If you can't setup program uninstall 64 bit version.
Retry access your application again
If you have still error(Set Enable 32-bit Applications to True for your application in IIS)
I made C# application for my friend which has connection to access database (mdb file). I have developed application on my computer with win7 x86 installed. My friend had XP and it worked perfectly, but now he installed win7 x64 and application doesn't work. In fact, application starts and behave regular, but cannot connect to database... Database too can be opened with access, but my application cannot connect to it.
What can be a problem? How to make my application works on both operating systems?
regards,
Vajda
Ask your friend to download and install the following file:
Microsoft Access Database Engine 2010 Redistributable
and make sure he picks the 64-bit version there (AccessDatabaseEngine_x64.exe).
By default there is no 64-bit ODBC/OLEDB driver for Access installed, but the 2010 version should work for 2007 databases as well.
You could probably also configure your program to be built for the x86 target. That would run the program as a 32-bit program, even on 64-bit OS.
Most likely, the .Net CLR is trying to fire the app up in 64bit mode by default on his new win7 box and this might be causing some issues with the referenced assemblies.
The first thing I would try is to change the Platform target of the application (go to Project properties in Visual Studio for the application) to x86 (from Any CPU) to force the application to run in 32bit mode.
If this works, you will have narrowed down your problem.
Then, after building the project, look in the bin folder to see which assemblies are being copied to the output folder. If you see any System.Data... or any other .Net assemblies that are already contained in the GAC, you'll want to delete these and then try to fire it up. This will force the application to use GAC assemblies written for 64bit use.
I want to build an application using Quicktime ActiveX interop that could run on a 64bit windows seven OS.
My problem is that the 3 dll : AxInterop.QTOControlLib.dll, Interop.QTOControlLib.dll, Interop.QTOLibrary.dll seems not to be compatible with 64bit OS => It leads to a crash as soon as the application is started.
How can I pass through this?
You must build your program as a x86 program. You can set this at the project properties.
I'm updating my operating system to Windows 7 x64, I only have experience with running 32-bit operating systems. Does anyone have any bad/good experiences with a 64 bit environment?
For reference, the tools I use are:
Visual Studio 2008
Tortoise SVN
TestDriven.Net
Oracle 10g XE
PL/SQL Developer
Dundas Chart
Analysis Services from MS SQL Server 2008
Running on a 64-bit operating system has a number of side effects that will be noticeable to some extent. The most common issues:
Edit and Continue in Visual Studio won't work. You can fix this by forcing your .NET app to run in 32-bit mode. Project + Properties, Build tab, Platform Target = x86. Resolved in VS2013.
If you use any ActiveX controls or COM components in your .NET app you may find your program no longer works since your machine doesn't have a corresponding 64-bit version of the COM server. You'll get error 0x80040154, REGDB_E_CLASSNOTREG, "Class not registered". Same fix as above.
The 64-bit debugger doesn't support mixed-mode debugging, you'll have to commit to either Managed only or Native only debugging. Same fix as above, as long as you don't have 64-bit specific issues. Resolved in VS2010.
Poorly written P/Invoke declarations that declare an uint or int where an IntPtr is required will stop working in 64-bit mode. You'll generally get an AccessViolation exception or a failure return code. Or a PInvokeStackImbalance MDA warning. You should not have any trouble locating the mistake, just fix the declaration.
Several legacy end-of-life Microsoft libraries are not available in a 64-bit version. That's most commonly a problem with Microsoft Access databases. Same fix as above.
You must use the correct version of Regasm.exe to register [ComVisible] assemblies. Select the one from either Framework or Framework64, depending on whether the client program is going to run in 64-bit or 32-bit mode. Or both if you want the server to be available in either.
A few COM type libraries contain bit-ness dependent arguments in their method declarations. ADO 2.8 is a notable one. Be sure to use the correct bitness of Tlbimp.exe to generate the correct COM interop assembly, Visual Studio won't do this right. Same approach as Regasm.exe
A 32-bit program has a different view of the registry from a 64-bit program. Specifically the HKCR and HKLM\Software hives are virtualized. In Regedit.exe, the 32-bit visible keys are seen under the HKLM\Software\Wow6432Node key. This can cause many subtle problems with programs that use the registry. The .NET 4 RegistryKey.OpenBaseKey() allows specifying the view you want.
Again for COM, you'll have the use the correct bitness of Regsvr32.exe to register an unmanaged COM server (not .NET servers, they use Regasm.exe). Use the one in c:\windows\system32 for 64-bit servers, c:\windows\syswow64 for 32-bit servers.
Folders in the file system are virtualized, specifically c:\windows\system32 and c:\program files. A 32-bit program will see c:\windows\syswow64 and c:\program files (x86).
Installers need to take all the above issues in consideration.
I wouldn't worry too much, if each program has an x64 download link, then use that. If not then your code will run through WOW64 emulation. And it will seem to you like it is running like normal.
Please see this related question I answered about 5 minutes ago.
WOW64 refers to windows32 on windows64
and it is a transparent emulation
laywer that allows x86 programs to run
on x64 operating systems. WOW64 will
automatically be used if you run an
x86 Windows program on an x64 Windows
operating system.
I am running Windows 7 Ultimate x64.
Visual Studio 2008 works fine.
I am using Subversion, but not Tortoise. AnkhSVN works fine.
The others I have no experience with.
Majority of software I use has no issues with x64, it's been a few years since the XP x64 troubles, and people have caught up with x64 it seems.
The primary issue with development in x64 however, is when running in x64 mode in Visual Studio, you can not edit code while debugging.
You must use x86 as the target platform in order to do so.
This is one of the reasons one of the beta's for Visual Studio 2010 defaulted target platform to x32 instead of Any Platform...