ASP.NET加载应用程序域

使用GAC和bin加载WEB应用程序域，被加载的对象必须继承MarshalByRefObject

代码如下：

 public class Intelligencer : MarshalByRefObject
    {
        public string Report()
        {
            AppDomain appDomain = AppDomain.CurrentDomain;
            StringBuilder sb = new StringBuilder();
            sb.AppendFormat("Domain ID:{0}\r\n",appDomain.Id);
            sb.AppendFormat("VirtualPath:{0}\r\n",HostingEnvironment.ApplicationVirtualPath);
            sb.AppendFormat("PhysicalOath:{0}\r\n", HostingEnvironment.ApplicationPhysicalPath);
            return sb.ToString();
        }

        
    }

static void TestHosting()  
           {  
              Intelligencer intell = ApplicationHost.CreateApplicationHost(typeof(Intelligencer), "/", Environment.CurrentDirectory) as Intelligencer;  
               Console.WriteLine("Current Domain ID:{0}\r\n",AppDomain.CurrentDomain.Id);  
               Console.WriteLine(intell.Report());  
           }  

如果调用的对象继承MarshalByRefObject同时也实现IRegisteredObject  我们可以用ApplicationManager来加载应用程序域

  public class Intelligencer : MarshalByRefObject, IRegisteredObject
    {
        public string Report()
        {
            AppDomain appDomain = AppDomain.CurrentDomain;
            StringBuilder sb = new StringBuilder();
            sb.AppendFormat("Domain ID:{0}\r\n",appDomain.Id);
            sb.AppendFormat("VirtualPath:{0}\r\n",HostingEnvironment.ApplicationVirtualPath);
            sb.AppendFormat("PhysicalOath:{0}\r\n", HostingEnvironment.ApplicationPhysicalPath);
            return sb.ToString();
        }
        public void Stop(bool immediate)
        {
            HostingEnvironment.UnregisterObject(this);
        }
    }

调用方式

      static void TestHosting()
        {
            Intelligencer intell = CreateWorkerAppDomainWithHost(typeof(Intelligencer), "/", Environment.CurrentDirectory) as Intelligencer;
            Console.WriteLine("Current Domain ID:{0}\r\n",AppDomain.CurrentDomain.Id);
            Console.WriteLine(intell.Report());
        }

        static object CreateWorkerAppDomainWithHost(Type hostType,string virtualPath, string physicalPath)
        {
           string uniqueAppString = string.Concat(virtualPath, physicalPath).ToLowerInvariant();
            string appid = (uniqueAppString.GetHashCode()).ToString("X", CultureInfo.InvariantCulture);
            var appmanager=ApplicationManager.GetApplicationManager();
            var buildManagerHostType = typeof(HttpRuntime).Assembly.GetType("System.Web.Compilation.BuildManagerHost");
            var buildManagerHost = appmanager.CreateObject(appid, buildManagerHostType, virtualPath, physicalPath, false);
             buildManagerHostType.InvokeMember("RegisterAssembly", BindingFlags.Instance | BindingFlags.InvokeMethod | BindingFlags.NonPublic, null, buildManagerHost, new object[] {hostType.Assembly.FullName,hostType.Assembly.Location });
            return appmanager.CreateObject(appid,hostType,virtualPath,physicalPath,false);
        }