Answer: Getting prior value on change of property using ReactiveUI in WPF MVVM

answer re: Getting prior value on change of property using ReactiveUI in WPF MVVM

Mar 13 '16

12

How about this:

 this.WhenAnyValue(vm => vm.AccountHolderType)
      .Buffer(2, 1)
      .Select(b => (Previous: b[0], Current: b[1]))
      .Subscribe(t => { 
//Logic using previous and new value for AccountHolderType 
});

I think you have missed this straight forward Buffer function.

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