How to get notified when checkbox is checked, the check box is from an element from list view.

What you’re doing up there will not work.

Now I want to know which element called the event

  • inside the TileUITemplate, add an Event Dispatcher with any data signature that you need
  • still inside the TileUITemplate, have the onCheckStateChanged call the dispatcher you added, pipe in the state of the checkbox and any other data (you could even send a Self reference - but it seems you want a string)
  • when binding (as in your screenshot above) rather than binding to the native onCheckStateChanged, bind the event to TileUITemplate directly
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