Model-View-Presenter Pattern - input validation

[George Washington]

To all,

In your opinion, where should input validation be performed? In the view? In
the Presenter?

Sincerely,

George Washington

 

[Lars-Erik]

I'd say view and service or business layer.
By view I mean asp.net markup like validator controls.
The presenter presumably forwards events to service or business layer
methods which should always do validation anyway.

 

[KellyBryan]

In my opinion, input validation should perform by the Presenter. This can be things like checking if a number field doesn't contain non numeric characters.