Once .NET 4.5 has been installed the view will no longer update when the AbstractCommandControl EnabledCondition changes. This is because the CanExecuteChanged event is invoked with the condition class passed in the "sender" parameter rather than passing the AbstractCommandControl control. It would appear that this is a bug fix in .NET 4.5 and WPF now expects the "sender" parameter to contain the ICommand it is bound to although I have yet to find any documentation for it.

To resolve the issue the OnEnableConditionChanged method of AbstractCommandControl should be modified from:

    private void OnEnableConditionChanged(object sender, EventArgs e)
    {
        CanExecuteChanged(sender, e);
    }

to:

    private void OnEnableConditionChanged(object sender, EventArgs e)
    {
        CanExecuteChanged(this, new EventArgs());
    }

asked 28 Jun '12, 19:05

Kieron's gravatar image

Kieron
16112
accept rate: 0%

edited 29 Jun '12, 12:16

Scott%20Whitlock's gravatar image

Scott Whitlock ♦♦
696262833

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Asked: 28 Jun '12, 19:05

Seen: 1,457 times

Last updated: 08 May '13, 00:03

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