CODEWITHSUNDEEP
c#asp.net
Amr Ellafy
Amr Ellafy

Reputation: 740

raising custom events to allow web user controls to intercommunicate

I have 2 web user controls, both inherit the same base class which extends UserControl. I want to raise an event on one and the other should be aware of it. both are on the same page however the 2nd control never handles the custom event i raised on the 1st one ! any ideas ? please just point to an implementation of possible (BTW, i'm googling it since morning but no luck !)

Upvotes: 2

Views: 811

Answers (2)

citronas
citronas

Reputation: 19365

You can easily do the following:

1) create an event in control 1.
2) create a public method in control 2, that gets called if the event in control 1 is raised
3) subscribe to the event of control 1 (where you instanciate them, e.g. another control, a content page or a master page)
4) inside the event handler from 3), call the method created in 2)

5) do the other thing around, if control 2 should communicate with control 1

This all require server-side execution. I'm sure there might be also client-side solutions.

Edit after comment: There are only two possible communication ways I can think of:
1) the controls don't know each other and therefore can't communicate directly. => you need a third control/page/masterpage/whatever (database, service etc) to enable the communication
2) the controls reference each other and therfore can communicate directly => very bad OOP. If you use this, you do not understand OOP at all and should consider your job

Feel free to chose one of the options.

Upvotes: 1

TheGeekYouNeed
TheGeekYouNeed

Reputation: 7539

You can Raise Events from User Controls using Delegates

Look Here for an example

Upvotes: 0

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