Anzahl der EventHandler eines Events bestimmen

Sprache: C#

Bestimmt die Anzahl der registrierten EventHandler eines beliebigen Events mittels Reflection

// using System.Reflection;
 EventHandlerList events = (EventHandlerList)typeof(Component)
           .GetProperty("Events", BindingFlags.NonPublic | BindingFlags.Instance)
           .GetValue(MyComboBox, null);
            object key = typeof(ComboBox)
                .GetField("EVENT_SELECTEDINDEXCHANGED", BindingFlags.NonPublic | BindingFlags.Static)
                .GetValue(null);

            Delegate handlers = events[key];
            int numberOfEventHandlers = handlers.GetInvocationList().Length;
            foreach (Delegate handler in handlers.GetInvocationList())
            {
                MethodInfo method = handler.Method;
                string name = handler.Target == null ? "" : handler.Target.ToString();
                if (handler.Target is Control) name = ((Control)handler.Target).Name;
                Console.WriteLine(name + "; " + method.DeclaringType.Name + "." + method.Name);
            }

// using System.Reflection;
 EventHandlerList events = (EventHandlerList)typeof(Component)
           .GetProperty("Events", BindingFlags.NonPublic | BindingFlags.Instance)
           .GetValue(MyComboBox, null);
            object key = typeof(ComboBox)
                .GetField("EVENT_SELECTEDINDEXCHANGED", BindingFlags.NonPublic | BindingFlags.Static)
                .GetValue(null);

            Delegate handlers = events[key];
            int numberOfEventHandlers = handlers.GetInvocationList().Length;
            foreach (Delegate handler in handlers.GetInvocationList())
            {
                MethodInfo method = handler.Method;
                string name = handler.Target == null ? "" : handler.Target.ToString();
                if (handler.Target is Control) name = ((Control)handler.Target).Name;
                Console.WriteLine(name + "; " + method.DeclaringType.Name + "." + method.Name);
            }

Abgelegt unter Event Eventhandler

Alte URL: /snippet/anzahl-der-eventhandler-eines-events-bestimmen/1101