private static object GetHead(EventHandlerList eh)
{
try
{
FieldInfo fHead = eh.GetType().GetField("head", AllBindings);
if (fHead == null)
{
fHead = eh.GetType().GetField("_head", AllBindings);
}
return(fHead.GetValue(eh));
}
catch { }
return(null);
}
//[HostProtection(SecurityAction.LinkDemand, SharedState = true)]
public object GetHead()
{
var field = _eventHandlerList.GetType()
.GetField("head", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.GetField);
if (field != null)
{
return(field.GetValue(_eventHandlerList));
}
return(null);
}
public cEventSuppressor(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);
}
public void DebugEventHandlers()
{
EventHandlerList events = (EventHandlerList)typeof(Component)
.GetField("events", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.GetField)
.GetValue(this);
object current = events.GetType()
.GetFields(BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.GetField)[0]
.GetValue(events);
List <Delegate> delegates = new List <Delegate>();
while (current != null)
{
delegates.Add((Delegate)GetField(current, "handler"));
current = GetField(current, "next");
}
}
/// <summary>
/// Remove disposed components from list
/// </summary>
public static void CleanLists()
{
List <TextBox> textBoxToRemove = new List <TextBox>();
List <Control> controlToRemove = new List <Control>();
//clean attached list
textBoxToRemove = new List <TextBox>();
foreach (KeyValuePair <TextBox, EnhancedTextBoxHelper.Items[]> entry in _attached_TextBox)
{
if (entry.Key.IsDisposed)
{
textBoxToRemove.Add(entry.Key);
}
}
foreach (TextBox entry in textBoxToRemove)
{
EventHandlerList events = typeof(TextBox).GetProperty("Events", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(entry, null) as EventHandlerList;
object current = events.GetType().GetFields(BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.GetField)[0].GetValue(events);
List <Delegate> delegates = new List <Delegate>();
while (current != null)
{
delegates.Add((Delegate)(current.GetType().GetField("handler", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.GetField).GetValue(current)));
current = current.GetType().GetField("next", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.GetField).GetValue(current);
}
EventInfo[] eventinfol = typeof(TextBox).GetEvents();
foreach (Type eventinfotype in eventinfol.Select(r => r.EventHandlerType).Distinct())
{
foreach (Delegate d in delegates.Where(r => r != null && r.GetType() == eventinfotype))
{
foreach (EventInfo eventinfo in eventinfol.Where(r => r.EventHandlerType == eventinfotype))
{
eventinfo.RemoveEventHandler(entry, d);
}
}
}
}
foreach (TextBox entry in textBoxToRemove)
{
_attached_TextBox.Remove(entry);
}
textBoxToRemove = new List <TextBox>();
foreach (TextBox entry in _attached_KeyDown)
{
if (entry.IsDisposed)
{
textBoxToRemove.Add(entry);
}
}
foreach (TextBox entry in textBoxToRemove)
{
_attached_KeyDown.Remove(entry);
}
textBoxToRemove = new List <TextBox>();
foreach (KeyValuePair <TextBox, MouseEventHandler> entry in _attached_MouseDown)
{
if (entry.Key.IsDisposed)
{
textBoxToRemove.Add(entry.Key);
}
}
foreach (TextBox entry in textBoxToRemove)
{
_attached_MouseDown.Remove(entry);
}
textBoxToRemove = new List <TextBox>();
foreach (TextBox entry in _attached_MouseHover)
{
if (entry.IsDisposed)
{
textBoxToRemove.Add(entry);
}
}
foreach (TextBox entry in textBoxToRemove)
{
_attached_MouseHover.Remove(entry);
}
textBoxToRemove = new List <TextBox>();
foreach (Control entry in _attached_parentMouseMove)
{
if (entry.IsDisposed)
{
controlToRemove.Add(entry);
}
}
foreach (Control entry in controlToRemove)
{
_attached_parentMouseMove.Remove(entry);
}
}
/// <summary>
/// winform获取控件某个事件委托
/// </summary>
/// <param name="component"></param>
/// <param name="EventName"></param>
/// <param name="EventHandlerTypeName"></param>
/// <returns></returns>
public Delegate[] GetComponentEventDelegate(Component component, string EventName, string EventHandlerTypeName)
{
Type componentType = component.GetType();
PropertyInfo eventsPropertyInfo = componentType.GetProperty("Events", BindingFlags.Instance | BindingFlags.NonPublic);
EventHandlerList eventHanlderList = eventsPropertyInfo.GetValue(component, null) as EventHandlerList;
FieldInfo HeadFieldInfo = eventHanlderList.GetType().GetField("head", BindingFlags.Instance | BindingFlags.NonPublic);
object HeadObject = HeadFieldInfo.GetValue(eventHanlderList);
do
{
FieldInfo[] fieldInfoList = componentType.GetFields(BindingFlags.Static | BindingFlags.Instance | BindingFlags.NonPublic);
foreach (FieldInfo fieldInfo in fieldInfoList)
{
object fieldValue = fieldInfo.GetValue(component);
if (fieldValue != null)
{
Type fieldType = fieldValue.GetType();
if (fieldType.Name == EventHandlerTypeName && (fieldValue as Delegate) != null)
{
return((fieldValue as Delegate).GetInvocationList());
}
else if (fieldType.Name == typeof(Object).Name)
{
if (fieldInfo.Name.IndexOf(EventName, StringComparison.OrdinalIgnoreCase) > -1)
{
if (HeadObject != null)
{
Delegate delegateObject = eventHanlderList[fieldValue];
if (delegateObject != null)
{
return(delegateObject.GetInvocationList());
}
}
}
}
}
}
componentType = componentType.BaseType;
} while (componentType != null);
if (HeadObject != null)
{
object ListEntry = HeadObject;
Type ListEntryType = ListEntry.GetType();
FieldInfo handlerFieldInfo = ListEntryType.GetField("handler", BindingFlags.Instance | BindingFlags.NonPublic);
FieldInfo keyFieldInfo = ListEntryType.GetField("key", BindingFlags.Instance | BindingFlags.NonPublic);
FieldInfo nextFieldInfo = ListEntryType.GetField("next", BindingFlags.Instance | BindingFlags.NonPublic);
while (ListEntry != null)
{
Delegate handler = handlerFieldInfo.GetValue(ListEntry) as Delegate;
object key = keyFieldInfo.GetValue(ListEntry);
ListEntry = nextFieldInfo.GetValue(ListEntry);
if (handler != null && handler.GetType().Name == EventHandlerTypeName)
{
return(handler.GetInvocationList());
}
}
}
return(null);
}
