Binding to a Function

[olegp]

Hello, I am trying to develop a window (WPF) that will collect data in a single textbox. The textblock will say “please enter the minimum value: “and the user hits enter I than want the textblock to change to “please enter the maximum value” I know this is done by data binding. The way I understand it is that the Enter button will increment i by some value, which is being passed into a function. Where the functions output is data bound to the textblock. I know you can sort the data collection by maximum and minimum, but I need that type of layout mentioned above. So I guess my question is it possible to data bind to a function, or is there some other way that I not seeing? Thanks for the help/suggestions/tips

[jmcilhinney]

No, it's only possible to bind to properties.

If you're talking about binding the Button so that it does something when it's clicked without handling its Click event, that can be done using properties. The Button implements the ICommandSource interface, which means that it has a Command property that can be bound to a property whose type implements the ICommand interface. That ICommand object has an Execute method that can do as you like. When the Button is clicked, the Execute method of the bound object is called.

If you're talking about binding the TextBlock then I'd probably suggest binding it to a property of type String and then, when the Button is clicked, modifying the value of that property. You'll probably also want to raise a PropertyChanged event for that property so that the UI knows to update, otherwise you'll have to update the binding explicitly.

By the way, this site has a forum dedicated to WPF. I've asked the mods to move this thread there.

[gep13]

Moved to the WPF Forum.

Thanks for the report John

Gary