Question

I’m using autofac with asp.net. In Global.asax I register all my web pages:

AssertNotBuilt();
// Register Web Pages
m_builder.RegisterAssemblyTypes(typeof(AboutPage).Assembly)
  .Where(t => t.GetInterfaces().Contains(typeof(IHttpHandler)))
  .AsSelf().InstancePerLifetimeScope();

m_container = m_builder.Build();
m_wasBuilt = true;

Then I use a custom httpHandler to get the current web page:

    public class ContextInitializerHttpHandler : IHttpHandler, IRequiresSessionState
    {
        public void ProcessRequest(HttpContext context)
        {
            //Get the name of the page requested
            string aspxPage = context.Request.Url.AbsolutePath;

            if (aspxPage.Contains(".aspx"))
            {
                // Get compiled type by path
                Type webPageBaseType = BuildManager.GetCompiledType(aspxPage).BaseType;

                // Resolve the current page
                Page page = (Page)scope.Resolve(webPageBaseType);

                //process request
                page.ProcessRequest(context);

            }
        }
        public bool IsReusable
        {
        get { return true; } 
        }
  }

All works ok, but then when it enters the web page_load, I see that all the asp controls that exist on the page are null. Why are they null and how do I initialize them?

Answer 1

I figured it out. The pages that I registered aren’t compiled like the pages that I can take from the context in my http handler:

string aspxPage = context.Request.Url.AbsolutePath;
Type webPageBaseType = BuildManager.GetCompiledType(aspxPage);

and these are the pages that I need that do hold all the controls. The problem is, I can’t register them at my http handler because they are dynamic and look in a form of somewebpage_aspx and the assembly is App_Web_somewebpage.aspx.cdcab7d2.r3x-vs2n, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null.

So the solution (or hack..) was not to register the web pages, and instead resolve the page controls from the scope:

ILifetimeScope scope = IocInitializer.Instance.InitializeCallLifetimeScope();
Type webPageType = BuildManager.GetCompiledType(aspxPage);
Page page = (Page)Activator.CreateInstance(webPageType);

foreach (var webPageProperty in webPageType.GetProperties(BindingFlags.SetProperty | BindingFlags.Instance | BindingFlags.Public))
{
    if (scope.IsRegistered(webPageProperty.PropertyType))
    {
        var service = scope.Resolve(webPageProperty.PropertyType);
        webPageProperty.SetValue(page, service, null);
    }
}