Ionic 2: How to call a method when select value is changed

Instead of

<ion-select #C ionChange="onChange(C.value)"> 
  ...
</ion-select>

Since ionChange is an event (and not a simple attribute) you need to do it like this:

<ion-select #C (ionChange)="onChange(C.value)">
  ...
</ion-select>

Instead of doing it this way

<ion-select #C (ionChange)="onChange(C.value)">
  ...
</ion-select>

you can also pass "$event" to get the value

<ion-select #C (ionChange)="onChange($event)">
  ...
</ion-select>

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