Running ASP.NET project as x64. BadImageFormatException

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I have a solution file in Visual Studio 2008 with 1 ASP.NET project and 2 other projects. The ASP.NET project references the other 2 projects.

The other 2 projects were recently changed to build as x64. The ASP.NET project was changed to x64. The computer in question is a Windows 7 64 bit machine.

When I run the ASP.NET project in Visual Studio as debug, I get compilation errors. The error say:

<pre>'Could not load file or assembly 'ClientPage, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An attempt was made to load a program with an incorrect format.'

[BadImageFormatException: Could not load file or assembly 'ClientPage, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An attempt was made to load a program with an incorrect format.]</pre>

I was able to debug this project as 'Any CPU'. Why am I not able to run it as x64. My PC is x64.

All my other projects in the same solution were set to 64 bit and I can execute them indedependently (as startup projects) without any problems.

Posted 23-Feb-11 11:57am

jobin007007

Updated 26-Feb-11 4:31am

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fjdiewornncalwe · Answer 1 · 2011-02-23T13:09:00

Solution 1

Is the ClientPage Assembly compiled in 64bit? If your solution is referencing a 32bit version, you will get this error.

Posted 23-Feb-11 13:09pm

fjdiewornncalwe

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[no name] 23-Feb-11 19:47pm

All my other projects in the same solution were set to 64 bit and I can execute them indedependently (as startup projects) without any problems.

When you say ClientPage assembly what do you mean?

The ClientPage is the ASP.NET project and it is set to 64 bit in Build options and also in Configuration Manager. So are all other projects.

Monjurul Habib · Answer 2 · 2011-02-27T06:21:00

set the validateRequest attribute of the Page directive to false:

<%@ Page validateRequest="false" %>

For all applications on your server

<configuration> <system.web> <pages validateRequest="false" /> </system.web> </configuration>

For more information regarding this you can navigate here

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