WPF command binding: CanExecute parameter

Question

Is the parameter passed to the CanExecute method of bound commands the CommandParameter specified in the binding control? If not, where does it come from?

Yes, it is the CommandParameter

Rachel
– Rachel

2011-08-19 18:39:10 +00:00
Commented Aug 19, 2011 at 18:39 — Rachel
– Rachel, Commented Aug 19, 2011 at 18:39

Alex Curtis · Accepted Answer · 2011-08-20 10:09:37Z

11

The CommandParameter is sent to both the CanExecute and Execute(d) events.

answered Aug 20, 2011 at 10:09

Alex Curtis

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Knasterbax · Accepted Answer · 2013-10-08 08:36:42Z

2

Alex Curtis is right:

public bool CanExecute(object parameter)
public void Execute(object parameter)

Use both the object that was set as CommandParameter for the command.

This is also good to know when calling ICommand's OnCanExecuteChanged(EventArgs e) because this method won't let you pass any parameter. So CanExecute must use the CommandParameter previously set.

answered Oct 8, 2013 at 8:36

Knasterbax

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