I have a Windows Store XAML app with a "Save" button, which points to an ICommand property in my ViewModel.
<Button Content="Save"
Command="{Binding DataContext.SaveNewNote, ElementName=grid, Mode=OneWay}"
CommandParameter="{Binding DataContext.CurrentItem, ElementName=grid}" />
on the propertychanged event of my Note model, that fires the CanExecutedChanged event - every time (every keystroke). However, this button will only enable/disable once I leave focus of one of the related textboxes.
In other words, there is a "Name" textbox. If String.IsNullOrWhiteSpace(Name.Text), then CanExecute is set to false. This seems to execute with every keystroke.
I would expect to see this bound Save button enable and disable with each keystroke. HOWEVER, instead, I see the button enable/disable only when I tab out of the textbox.
How can I get this bound button to respect the CanExecuteChanged event on every keystroke, instead of when the texbox loses focus?