Well..
I want something that i can write once, and use in every form, in every
control.
I have already implementedIExtenderProvider to set the security values in
design time for every control in any forms that i load. Then, what i do, is
go to the database, fetch the security values for that user, store them in a
IPrincipal object that i created and everytime i load a form, i compare the
security values of the user with those in every control. That works
perfect!. I created a method in a base form, all my forms inherits from it.
So, when i load a form, i call that method, pass the parameters that i need
and voila... my controls appear enabled, disabled, visible... depends on the
criteria. So, one piece of code, 5 lines, just works for every form and
every control.
I wanted then, due to the ActionSecurityLevel, to be able to change in
runtime the method to be called when you click on a button. right? 'Cause i
don't wanna be writing code everytime i create a subscription to an event. I
know how to add in runtime an eventHandler to a control... as easy as
Control.[event]+=new System.EventHandler [or any other
handler](the_method_to_call). That's fine. But doesn't prevent the code to
perform any other method that had a subscription to that event.
So, i know also that you can programmatically unsubscribe an event by
Control.[event]-=.......... the problem is that when i am iterating thru
controls, i don't have the way to pass or know which handler[method] is
dealing with the subscription. I could do some trick. Like... once i hace
the control (in my iteration security checking code) i can find its instance
name, ok? lets say button1. ok. then i can ASSUME that when i created that
subscription it took by default the _Click suffix... so, it would be
button1_Click.
Next step would be to cast to Handler this string "button1_Click". So, i
would have to create a Method, returning a handler after i pass a parameter
type string with the "name" i "guess" it's going to have the handler. does
it makes sense?
let's put some pseudo code.
let's assume all controls are button.
foreach(Control c in form.Controls)
if(c.ActionSecurityLevel > User.ActionSecurityLevel)
c.click+=new system.EventHandler(myNonActionCode); --> we have here
added a new handler
c.click-=new system.EventHandler(????????); --> i can't write a
handler manually since you are iterating. i don't know the handler method
since i don't "know" its list of handlers. we can't access list of
suscription from the form to that control event.
MY "SILLY" SOLUTION
in that line of code (???????).. well i would set a method in there that
would return the eventhandler.
private EventHandler getEventHandler(string assumedName) -> remember,
assumed name is the concatenation of instance name of the control and
"_Click"
so, this method supposedly will return a handler with the name by default
that VS gives to a subscription to a click event. for example, for button
instance button1, would be button1_Click.
