asp.net c# generic event handling routine

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How to implement a generic event handling routine in asp.net c# that takes any control as an input and performs the required operation?That is how to implement ROUTINES for controls having similar operations?

Posted 25-Sep-13 4:15am

SubhamSoni123

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OriginalGriff · Answer 1 · 2013-09-25T05:24:00

Solution 1

Every event is generic already (barring only the "specialised" ones with custom EventArgs, and even they will work with the base version) since they provide a sender object parameter which is the class (or Control in this case) that raised the event and an e EventArgs parameter with any details. So you can (in theory, I'd hate to do it in practice) send all your Events to a single handler, and sort out within that what the handler is supposed to do with it.

Probably be a poor way to handle things if you are expecting a number of different Control types to use the same handler though - but it is possible.

Posted 25-Sep-13 5:24am

OriginalGriff

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SubhamSoni123 25-Sep-13 11:45am

If i set of button events i want a single code to handle them generically rather than seperate group of codes and what is the substitute of dll in a web page?

OriginalGriff 25-Sep-13 12:01pm

A set of buttons can all use the same handler method, yes - no problem at all, I do it all the time.
The substitute for "a DLL file" in a web page is "a DLL file". They work fine, as long as you add a reference to the file.

SubhamSoni123 25-Sep-13 12:04pm

But dll's are only for windows applications right?

OriginalGriff 25-Sep-13 12:53pm

Good grief no!
.NET works with two types of executable files: EXE and DLL - they both contain Assemblies, and the only practical difference is that a DLL does not contain a "main" method.
The whole of .NET that supports your web site is in DLL files! :laugh:

SubhamSoni123 25-Sep-13 22:05pm

So now can I write my Generic Event Handling routines in dll's and call them?If so can please tell how to implement?

OriginalGriff 26-Sep-13 3:41am

You could...sort of...but I wouldn't. Event handlers are not (normally) static: they get a *this* pointer to relate to the class containing the object raising the event which would not be correct in a DLL class method, unless the DLL contains the whole class.
Keep the event handlers with the code that generates them - but move the execution into a DLL by all means and call that method from your generic event handlers. Otherwise, the DLL has to be "aware" that the method is an event handler and that is kinda against the OOP concept. All it means is calling a DLL method in the event handler, and it ends up much clearer when you look at the code.