C#中删除控件的事件的方法

需要事先引用

 

 

 
  using System.ComponentModel; 
  
 
  using System.Reflection;        
  
  
  /// 
    
  <summary> 
  
         
  /// 
   删除指定控件的指定事件
         
  /// 
    
  </summary> 
  
         
  /// 
    
  <param name="control"></param> 
  
         
  /// 
    
  <param name="eventname"></param> 
  
         
  public  
  void ClearEvent(System.Windows.Forms.Control control,  
  string eventname) 
  
        { 
  
             
  if (control ==  
  null)  
  return; 
  
             
  if ( 
  string.IsNullOrEmpty(eventname))  
  return; 
  
 
  
            BindingFlags mPropertyFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.Static | BindingFlags.NonPublic; 
  
            BindingFlags mFieldFlags = BindingFlags.Static | BindingFlags.NonPublic; 
  
            Type controlType =  
  typeof(System.Windows.Forms.Control); 
  
            PropertyInfo propertyInfo = controlType.GetProperty( 
  " 
  Events 
  ", mPropertyFlags); 
  
            EventHandlerList eventHandlerList = (EventHandlerList)propertyInfo.GetValue(control,  
  null); 
  
            FieldInfo fieldInfo = ( 
  typeof(System.Windows.Forms.Control)).GetField( 
  " 
  Event 
  " + eventname, mFieldFlags); 
  
            Delegate d = eventHandlerList[fieldInfo.GetValue(control)]; 
  
 
  
             
  if (d ==  
  null)  
  return; 
  
            EventInfo eventInfo = controlType.GetEvent(eventname); 
  
 
  
             
  foreach (Delegate dx  
  in d.GetInvocationList()) 
  
                eventInfo.RemoveEventHandler(control, dx); 
  
 
  
        }