MVVM路由和中继命令 [英] MVVM Routed and Relay Command

问题描述

RoutedCommand 之间的区别是什么？ a>和 RelayCommand ？
何时使用RoutedCommand和何时在MVVM模式中使用RelayCommand？

What is the Difference between the RoutedCommand and RelayCommand ? When to use RoutedCommand and when to use RelayCommand in MVVM pattern ?

推荐答案

RoutedCommand 是WPF的一部分，而 RelayCommand 由WPF专家Josh Smith创建）。

RoutedCommand is part of WPF, while RelayCommand was created by a WPF Disciple, Josh Smith ;).

但是，严格地说，RS Conley描述了一些差异。关键的区别是RoutedCommand是一个ICommand实现，它使用一个RoutedEvent来路由树，直到找到命令的CommandBinding，而RelayCommand没有路由，直接执行一些委托。在M-V-VM场景中，RelayCommand（Prism中的DelegateCommand）可能是更好的选择。

Seriously, though, RS Conley described some of the differences. The key difference is that RoutedCommand is an ICommand implementation that uses a RoutedEvent to route through the tree until a CommandBinding for the command is found, while RelayCommand does no routing and instead directly executes some delegate. In a M-V-VM scenario a RelayCommand (DelegateCommand in Prism) is probably the better choice all around.

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