DomainPropertyValueHandler<TElement,TValue>.ValueChanging Method
Definition
Important
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Called by SetValue before the value is changed to perform validation and raise OnValueChanging event.
protected:
void ValueChanging(TElement element, TValue oldValue, TValue newValue);protected void ValueChanging (TElement element, TValue oldValue, TValue newValue);member this.ValueChanging : 'Element * 'Value * 'Value -> unitProtected Sub ValueChanging (element As TElement, oldValue As TValue, newValue As TValue)Parameters
- element
- TElement
Element which owns the property.
- oldValue
- TValue
Current property value.
- newValue
- TValue
New property value.
Exceptions
element is null.
Operation is invoked outside of modeling transaction scope or there was an attempt to set calculated property.