Reprosteps

• Handle EditContext.OnFieldChanged event
• Click on a date in the calendar.
• EditContext.OnFieldChanged event handler is called twice

Why?

(both HxInputDate<TValue> and also HxInputDateInternal<TValue> inherit from InputBase<TValue>)

First call

• HxInputDateInternal<TValue>.HandleValueChanged is called.
• HxInputDateInternal<TValue>.HandleValueChanged sets the CurrentValueAsString.
• CurrentValueAsString setter sets InputBase<TValuegt;.CurrentValue.
• InputBase<TValue>.CurrentValue calls ValueChanged (important to understand the the second call)
• The InputBase<TValue>.CurrentValue setter calls EditContext.NotifyFieldChanged for the first time.

Second call

• HxInputDate<Value> handles ValueChanged event
• It sets the CurrentValue property (see BuildRenderInputCore method, sequence number 101).
• The InputBase<TValue>.CurrentValue setter calls (again) EditContext.NotifyFieldChanged.

Posible solutions (not sure right now)

• only HxInputDate<TValue> should derive from InputBase<TValue>
• OR HxInputDate<TValue> should not Set CurrentValue, but it should fire ValueChanged event

(I guess this occurs also in HxInputDateRange while it uses the same code structure.)