有时我们不得不使用第三方控件，我们需要构建这些尴尬的解决方案。基于@Anoop Muraleedharan的答案，我创建了这个具有推理类型和ToolStripItem支持的解决方案

    public static void RemoveItemEvents<T>(this T target, string eventName) 
        where T : ToolStripItem
    {            
        RemoveObjectEvents<T>(target, eventName);
    }

    public static void RemoveControlEvents<T>(this T target, string eventName)
        where T : Control
    {
        RemoveObjectEvents<T>(target, eventName);
    }

    private static void RemoveObjectEvents<T>(T target, string Event) where T : class
    {
        var typeOfT = typeof(T);
        var fieldInfo = typeOfT.BaseType.GetField(
            Event, BindingFlags.Static | BindingFlags.NonPublic);
        var provertyValue = fieldInfo.GetValue(target);
        var propertyInfo = typeOfT.GetProperty(
            "Events", BindingFlags.NonPublic | BindingFlags.Instance);
        var eventHandlerList = (EventHandlerList)propertyInfo.GetValue(target, null);
        eventHandlerList.RemoveHandler(provertyValue, eventHandlerList[provertyValue]);
    }

你可以这样使用它

    var toolStripButton = new ToolStripButton();
    toolStripButton.RemoveItemEvents("EventClick");

    var button = new Button();
    button.RemoveControlEvents("EventClick");

我讨厌这里展示的任何完整的解决方案，我现在做了一个混合和测试，为任何事件处理程序工作:

public class MyMain()
    public void MyMethod() {
        AnotherClass.TheEventHandler += DoSomeThing;
    }

    private void DoSomething(object sender, EventArgs e) {
        Debug.WriteLine("I did something");
        AnotherClass.ClearAllDelegatesOfTheEventHandler();
    }

}

public static class AnotherClass {

    public static event EventHandler TheEventHandler;

    public static void ClearAllDelegatesOfTheEventHandler() {

        foreach (Delegate d in TheEventHandler.GetInvocationList())
        {
            TheEventHandler -= (EventHandler)d;
        }
    }
}

简单!感谢Stephen Punak。

我使用它是因为我使用一个通用的本地方法来删除委托，当设置不同的委托时，在不同的情况下调用本地方法。

我刚刚发现如何在设置WinForms控件的属性时挂起事件。它将删除控件中的所有事件:

namespace CMessWin05
{
    public class EventSuppressor
    {
        Control _source;
        EventHandlerList _sourceEventHandlerList;
        FieldInfo _headFI;
        Dictionary<object, Delegate[]> _handlers;
        PropertyInfo _sourceEventsInfo;
        Type _eventHandlerListType;
        Type _sourceType;


        public EventSuppressor(Control control)
        {
            if (control == null)
                throw new ArgumentNullException("control", "An instance of a control must be provided.");

            _source = control;
            _sourceType = _source.GetType();
            _sourceEventsInfo = _sourceType.GetProperty("Events", BindingFlags.Instance | BindingFlags.NonPublic);
            _sourceEventHandlerList = (EventHandlerList)_sourceEventsInfo.GetValue(_source, null);
            _eventHandlerListType = _sourceEventHandlerList.GetType();
            _headFI = _eventHandlerListType.GetField("head", BindingFlags.Instance | BindingFlags.NonPublic);
        }

        private void BuildList()
        {
            _handlers = new Dictionary<object, Delegate[]>();
            object head = _headFI.GetValue(_sourceEventHandlerList);
            if (head != null)
            {
                Type listEntryType = head.GetType();
                FieldInfo delegateFI = listEntryType.GetField("handler", BindingFlags.Instance | BindingFlags.NonPublic);
                FieldInfo keyFI = listEntryType.GetField("key", BindingFlags.Instance | BindingFlags.NonPublic);
                FieldInfo nextFI = listEntryType.GetField("next", BindingFlags.Instance | BindingFlags.NonPublic);
                BuildListWalk(head, delegateFI, keyFI, nextFI);
            }
        }

        private void BuildListWalk(object entry, FieldInfo delegateFI, FieldInfo keyFI, FieldInfo nextFI)
        {
            if (entry != null)
            {
                Delegate dele = (Delegate)delegateFI.GetValue(entry);
                object key = keyFI.GetValue(entry);
                object next = nextFI.GetValue(entry);

                Delegate[] listeners = dele.GetInvocationList();
                if(listeners != null && listeners.Length > 0)
                    _handlers.Add(key, listeners);

                if (next != null)
                {
                    BuildListWalk(next, delegateFI, keyFI, nextFI);
                }
            }
        }

        public void Resume()
        {
            if (_handlers == null)
                throw new ApplicationException("Events have not been suppressed.");

            foreach (KeyValuePair<object, Delegate[]> pair in _handlers)
            {
                for (int x = 0; x < pair.Value.Length; x++)
                    _sourceEventHandlerList.AddHandler(pair.Key, pair.Value[x]);
            }

            _handlers = null;
        }

        public void Suppress()
        {
            if (_handlers != null)
                throw new ApplicationException("Events are already being suppressed.");

            BuildList();

            foreach (KeyValuePair<object, Delegate[]> pair in _handlers)
            {
                for (int x = pair.Value.Length - 1; x >= 0; x--)
                    _sourceEventHandlerList.RemoveHandler(pair.Key, pair.Value[x]);
            }
        }

    }
}

斯蒂芬是对的。这很简单:

public event EventHandler<Cles_graph_doivent_etre_redessines> les_graph_doivent_etre_redessines;
public void remove_event()
{
    if (this.les_graph_doivent_etre_redessines != null)
    {
        foreach (EventHandler<Cles_graph_doivent_etre_redessines> F_les_graph_doivent_etre_redessines in this.les_graph_doivent_etre_redessines.GetInvocationList())
        {
            this.les_graph_doivent_etre_redessines -= F_les_graph_doivent_etre_redessines;
        }
    }
}

接受的答案不完整。对于声明为{add;删除;}

下面是工作代码:

public static void ClearEventInvocations(this object obj, string eventName)
{
    var fi = obj.GetType().GetEventField(eventName);
    if (fi == null) return;
    fi.SetValue(obj, null);
}

private static FieldInfo GetEventField(this Type type, string eventName)
{
    FieldInfo field = null;
    while (type != null)
    {
        /* Find events defined as field */
        field = type.GetField(eventName, BindingFlags.Static | BindingFlags.Instance | BindingFlags.NonPublic);
        if (field != null && (field.FieldType == typeof(MulticastDelegate) || field.FieldType.IsSubclassOf(typeof(MulticastDelegate))))
            break;

        /* Find events defined as property { add; remove; } */
        field = type.GetField("EVENT_" + eventName.ToUpper(), BindingFlags.Static | BindingFlags.Instance | BindingFlags.NonPublic);
        if (field != null)
            break;
        type = type.BaseType;
    }
    return field;
}

你们对自己太苛刻了。很简单:

void OnFormClosing(object sender, FormClosingEventArgs e)
{
    foreach(Delegate d in FindClicked.GetInvocationList())
    {
        FindClicked -= (FindClickedHandler)d;
    }
}