Type.gettype () renvoyant null

J'ai eu un problème très similaire à l'affiche originale, sauf que je devais instancier la classe de code de mon contrôle de mon utilisateur personnalisé dans une classe utilitaire statique plutôt que d'une page ASPX, donc chargable de caractères n'était pas disponible pour moi. . Voici ce que j'ai fini par faire:

public static class Utils
{
    public static string MyFunc(string controlClassName)
    {
        string result = "";
        // get a list of all assemblies in this application domain
        Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();
        // the trouble is that we don't know which assembly the class is defined in,
        // because we are using the "Web Site" model in Visual Studio that compiles
        // them on the fly into assemblies with random names
        // -> however, we do know that the assembly will be named App_Web_*
        // (http://msdn.microsoft.com/en-us/magazine/cc163496.aspx)
        foreach (Assembly assembly in assemblies)
        {
            if (assembly.FullName.StartsWith("App_Web_"))
            {
                // I have specified the ClassName attribute of the <%@ Control %>
                // directive in the relevant ASCX files, so this should work
                Type t = assembly.GetType("ASP." + controlClassName);
                if (t != null)
                {
                    // use reflection to create the instance (as a general object)
                    object o = Activator.CreateInstance(t);
                    // cast to the common base type that has the property we need
                    CommonBaseType ctrl = o as CommonBaseType;
                    if (ctrl != null)
                    {
                        foreach (string key in ctrl.PropertyWeNeed)
                        {
                            // finally, do the actual work
                            result = "something good";
                        }
                    }
                }
            }
        }
        return result;
    }
}