How to programmatically remove an HttpModule from the ASP.NET pipeline?

Question

We can programatically add HttpModules using DynamicModuleUtility.RegisterModule(typeof (SomeHttpModule)) - is there a way to remove them?

Answer 1

1. Instantiate the HTTP Module in Init method in Global.asax
2. Call Module.Init() as described here
3. In Init method of your module, hook required eventhandlers.
4. Override the Dispose method in the handler and unhook the eventhandlers.

5. Expose the instance as public property on global.asax so that you can call Dispose when you want to unregister the module

   // Global.asax
   

public IHttpModule MyModuleInstance { get; private set; }

public override void Init()
{
    base.Init();
    MyModuleInstance = new MyModule();
    MyModuleInstance.Init(this);
}



 // MyModule.cs
    public void Dispose()
    {
        _context.BeginRequest -= context_BeginRequest;
    }

    public void Init(HttpApplication context)
    {
        _context = context;
        context.BeginRequest += context_BeginRequest;
    }
   private void context_BeginRequest(object sender, EventArgs e)
    {
        HttpApplication app = sender as HttpApplication;
        app.Context.Response.Write("Hello from OnBeginRequest in custom module.<br>");
    }

// TO unregister

protected void Button1_Click(object sender, EventArgs e)
    {
        this.ApplicationInstance.MyModuleInstance.Dispose();
    }