Why am I getting this error? “The given assembly name or codebase was invalid.”

Question

I have created and implemented the IHttpModule interface in order to use the Session_Start event in SharePoint 2010 (like global.asax in asp.net). I have added the add tag into my web.config file in the modules section (because I use integrated mode) and I have also deployed my DLL to GAC, but I get this error:

The given assembly name or codebase was invalid. (Exception from HRESULT: 0x80131047)

Does anyone know why this is happening?

Answer 1

The problem was in my module tag in web.config file.
It must be the full assembly name, not just the class name.
which in c# terms it can be the Assembly.FullName code.
For example i have a class which implemented IHttpModule like this:

public class StatisticsModule : IHttpModule
{
   public void Init(HttpApplication context)
   {
      context.ReleaseRequestState += context_ReleaseRequestState;
   }

   public void Dispose()
   { }
}

and this class placed in Shakib.Statistics Namespace, so for this example the Module Tag which should be in web.config and "modules" section, must be this:

<add name="Statistics" type="Shakib.Statistics.StatisticsModule, Shakib.Statistics, Version=1.0.0.0, Culture=neutral, PublicKeyToken=4d63664a8351e206" />