WPF Commands - Doing it with no code-behind
command, mvp, mvvm, wpf
Solution
The Model-View-ViewModel (MVVM) design pattern aims at achieving exactly that goal, and Josh Smith's excellent article explains how to apply it.
For commands you can use the `RelayCommand` class described in the article.
Since you already have a presenter object, you can let that class expose an `ICommand` property that implements the desired logic, and then bind the XAML to that command. It's all explained in the article.
Problem
I'm building a simple data entry app in WPF form using the MVVM pattern. Each form has a presenter object that exposes all the data etc. I'd like to use WPF Commands for enabling and disabling Edit/Save/Delete buttons and menu options. My problem is that this approach seems to require me to add lots of code to the code-behind. I'm trying to keep my presentation layer as thin as possible so I'd much rather this code/logic was inside my presenter (or ViewModel) class rather than in code-behind. Can anyone suggest a way to achieve the same thing without code-behind? My XAML looks a bit like this: ``` <Window.CommandBindings> <CommandBinding Command="ApplicationCommands.Save" CanExecute="CommandBinding_CanExecute" Executed="CommandBinding_Executed" /> </Window.CommandBindings> ``` and my code-behind looks a bit like this: ``` private void CommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e) { e.CanExecute = ( _presenter.SelectedStore != null && _presenter.SelectedStore.IsValid); } ```