Clear MenuItem, with clear command

Question

hi i'm a "very" beginner in wpf i'm trying to make a menu item "Clear", it should clear the text in the focused text box, actually i could not find a built in command that does the job like (copy,paste,cut..etc)

is there one built in or do i have to make a custom routed command, and if so i've tried but failed, and need ideas

i've made the ClearCommandExecuted logic, but the problem is with "CanExecute" i tried to access the Keyboard.FocusedElement there, but failed because the focused element is the menu item it self when it's clicked !!!!

please help thanks

Answer 1

You need to use one of the arguments passed into your CanExecuteQuery:

    private void ClearCommandBindingCanExecute(object sender, CanExecuteRoutedEventArgs e)
    {
        // e.Source is the element that is active,
        if (e.Source is TextBox) // and whatever other logic you need.
        {
            e.CanExecute = true;
            e.Handled = true;
        }
    }

    private void ClearCommandBindingExecuted(object sender, ExecutedRoutedEventArgs e)
    {
        var textBox = e.Source as TextBox;
        if (textBox != null)
        {
            textBox.Clear();
            e.Handled = true;
        } 
    }

I hope this is enough to get you headed in the right direction...