C#中刪除控件的事件的方法

需要事先引用

 

 

 
          using System.ComponentModel; 
          
 
          using System.Reflection;        
          
  
          /// 
            
          <summary> 
          
         
          /// 
           刪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); 
          
 
          
        }