WPF MVVM textbox text binding vs changedText event

Question

I have textbox with Text property binded to viewmodel. I have binded TextChanged event to viewmodel.

But the problem is that the event fires every sign is added to t

Answer 1

There is a really simple answer to this; use UpdatePropertyTrigger=PropertyChanged. This will update your VM property each time a character is changed. No need for triggers or commands :-)

<TextBox Text="{Binding ViewModelProperty, UpdateSourceTrigger=PropertyChanged}"></TextBox>

Read here for more info: http://msdn.microsoft.com/en-us/library/system.windows.data.updatesourcetrigger(v=vs.110).aspx