If I have UserControlDervied that derives from another UserControlBase , and 
in UserControlBase the OnLoad method is overriden , is it necessary to also 
override the OnLoad method in UserControlDerived , or can the magic 
Page_Load method be used ?   Does Page_Load automatically call OnLoad in any 
underlying class ?

John,

Page_Load is an event which is called by base class, whereas OnLoad is an 
override which is executed instead of the base method.

To summarise:
Page_Load event is called in both classes (it is up to the programmer 
whether to supply a handler and in which class); those events are independent 
and the execution order cannot be guaranteed.

OnLoad overrides base class method, and the code is executed in the 
inherited class. It is up to the programmer whether to call base class 
(OnLoad) method - which is usually a good practice as there may be other 
listeners attached to that.
In this case the programmer can decide whether to execute the custom code 
before or after calling the base method.

"John Grandy" wrote:


> If I have UserControlDervied that derives from another UserControlBase , and 
> in UserControlBase the OnLoad method is overriden , is it necessary to also 
> override the OnLoad method in UserControlDerived , or can the magic 
> Page_Load method be used ?   Does Page_Load automatically call OnLoad in any 
> underlying class ? 
> 
> 
>