Installing a modified version of ASP.NET MVC

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Installing a modified version of ASP.NET MVC

I have made a relatively simple change to the MVC 1.0 source code to correct a bug in the DropDownList HtmlHelper (discussed in another question).

I was able to rebuild the MVC solution, ran all the tests, including the one I hadd added to show the bug I was fixing, and built a new DLL.

But how do I use that?

I tried moving the new MVC dll into the project and changing all the project references to point to it, but when I try to run the MVC website, it's throwing an exception saying there's a conflict between my version of MVC and the MVC in the GAC.

I tried to use gacutil.exe to remove the one from the GAC, but it says it can't do that because it would make another program (the Microsoft Installer? fail.

What do I have to do to install my newly built version in place of the "official" version?

How about changing the version number when you compile the modified MVC framework?

UpTheCreek 2009-10-27 19:43:10

+1 A:

If you want to remove it from the GAC without uninstalling MVC (which includes the Visual Studio templates you probably need), you need to do this in the registry:

Find registry key HKEY_CLASSES_ROOT\Installer\Assemblies\Global and look for key starting with System.Web.Mvc – delete it

Now you should be able to use gacutil.exe to remove System.Web.Mvc from the GAC, and you should be able to use your version from your /bin folder.

JonoW 2009-10-28 10:28:53

Thanks, Jono, that did it.

Dave Hanna 2009-10-28 13:27:26

Okay, that gets MVC out of the GAC and alleviates the conflict, but I still have parts of the code trying to load that version. Specifically, BuildManger.CreateInstanceFromVirtualPath throws an exception saying that it can't "load MVC version 1.0.0.0, public token= ... the manifest definition does not match the assembly reference"I've taken the assembly reference out of web.config and replaced it with a generic "add name="System.Web.Mvc" (without the details). Do I need an assembly re-direct, or something? What else do I need to do to get it to accept the new version throughout?

Dave Hanna 2009-10-28 14:56:44

Okay, I got it. I had changed the assembly references in the root web.config, but missed the fact that the View folder has a web.config in it, and it had some fully-qualified references that I had to change. Once I did that, it worked.

Dave Hanna 2009-10-28 15:44:02

I think you need the entries in web.config, in the system.web/compilation/assemblies section. Maybe try add that again. Have you strongly named the assmebly? Make sure your PublicKeyToken matches

JonoW 2009-10-28 15:45:25

Ah nice one, see you got it working, ignore my last comment then...

JonoW 2009-10-28 15:46:01

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Installing a modified version of ASP.NET MVC

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