/// <summary>        /// 清除控件的事件        /// </summary>        /// <param name="objectHasEvents"></param>        /// <param name="EventFiledName"></param>        public static void ClearAllEvents(Control objectHasEvents, string EventFiledName)        {            if (objectHasEvents == null)            {                return;            }            EventInfo[] events = objectHasEvents.GetType().GetEvents(                BindingFlags.Public |                BindingFlags.NonPublic |                BindingFlags.Instance);            if (events == null || events.Length < 1)            {                return;            }            for (int i = 0; i < events.Length; i++)            {                try                {                    EventInfo ei = events[i];                    /********************************************************                      * class的每个event都对应了一个同名的private的delegate类                      * 型成员变量（这点可以用Reflector证实）。因为private成                      * 员变量无法在基类中进行修改，所以为了能够拿到base                      * class中声明的事件，要从EventInfo的DeclaringType来获取                      * event对应的成员变量的FieldInfo并进行修改                      ********************************************************/                    //FieldInfo fi = ei.DeclaringType.GetField("EVENT_SELECTEDVALUECHANGED", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.Static);                    FieldInfo fi = null;                    if (EventFiledName == null)                        fi = ei.DeclaringType.GetField(ei.Name, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.Static);                    else                        fi = ei.DeclaringType.GetField(EventFiledName, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.Static);                    if (fi != null)                    {                        // 将event对应的字段设置成null即可清除所有挂钩在该event上的delegate                         fi.SetValue(objectHasEvents, null);                    }                }                catch                {                }            }            if (objectHasEvents is BizMagCardTextBox)            {                RemoveEvent(objectHasEvents, "EventEnter", "Enter");                RemoveEvent(objectHasEvents, "EventKeyPress", "KeyPress");            }            if (objectHasEvents is SDUnionICAndMagCard)            {                RemoveEvent(objectHasEvents, "EventEnter", "Enter");            }            if (objectHasEvents is BizComboBox)            {                RemoveEvent(objectHasEvents, "EVENT_SELECTEDINDEXCHANGED", "SelectedIndexChanged");            }        }        /// <summary>        /// 去掉指定控件的指定事件        /// </summary>        /// <param name="con">当前的控件</param>        /// <param name="eventName">事件名称</param>        /// <param name="infoName">对应的field名称</param>        public static void RemoveEvent(Control con, string eventName, string infoName)        {            try            {                BindingFlags mPropertyFlags = BindingFlags.Instance | BindingFlags.Public                | BindingFlags.Static | BindingFlags.NonPublic;//筛选                EventInfo[] events = con.GetType().GetEvents(mPropertyFlags);                Type type = typeof(Control);                PropertyInfo propertyInfo = type.GetProperty("Events", mPropertyFlags);                EventHandlerList eventHandlerList = (EventHandlerList)propertyInfo.GetValue(con, null);//事件列表                foreach (EventInfo ei in events)                {                    if (ei.Name.Equals(infoName))                    {                        FieldInfo fieldInfo = ei.DeclaringType.GetField(eventName, mPropertyFlags);                        Delegate d = eventHandlerList[fieldInfo.GetValue(con)];//获得对应的事件委托                        if (d == null) return;                        foreach (Delegate dx in d.GetInvocationList())                        {                            ei.RemoveEventHandler(con, dx); //移除对应的事件                        }                    }                }            }            catch (Exception ex)            { }        }