反射和特性在SOA中的使用

[Test(ClassType = typeof(TestSOABusiness))]
    public class TestHandler : IHttpHandler
    {
        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";

            string usertype = context.Request.QueryString["usertype"];
            Type classtype = null;
            string value=string.Empty;
            Type t = this.GetType();
            object[] objAttrs = t.GetCustomAttributes(typeof(TestAttribute), true);
            foreach (object obj in objAttrs)
            {
                TestAttribute attr = obj as TestAttribute;
                if (attr != null)
                {
                   classtype = attr.ClassType;
                   break;
                }
            }

            switch(usertype)
            {
                case "GetMethodA":
                    {
                        MethodInfo mf1 = classtype.GetMethod(usertype, BindingFlags.Public | BindingFlags.Static, null, new Type[] { typeof(string) }, null);
                        value = (string)mf1.Invoke(null, new object[] { usertype });
                        break;
                    }
                case "GetMethodB":
                    {
                        MethodInfo mf1 = classtype.GetMethod(usertype, BindingFlags.Public | BindingFlags.Static, null, new Type[] { typeof(int) }, null);
                        value = (string)mf1.Invoke(null, new object[] { 2 });
                        break;
                    }
                default:
                    break;

            }
            context.Response.Write(value);
        }

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