/// <summary>
/// Sets the value of a specific property.
/// </summary>
/// <param name="property">The property to set.</param>
/// <param name="value">Value of the property.</param>
/// <param name="notifyOnChange">If <c>true</c>, the <see cref="INotifyPropertyChanged.PropertyChanged"/> event will be invoked.</param>
/// <exception cref="PropertyNotNullableException">The property is not nullable, but <paramref name="value"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentNullException">The <paramref name="property"/> is <c>null</c>.</exception>
protected internal void SetValue <TValue>(PropertyData property, TValue value, bool notifyOnChange = true)
{
Argument.IsNotNull("property", property);
// Is the object currently read-only (and aren't we changing that)?
if (IsReadOnly || _isFrozen)
{
if (property != IsReadOnlyProperty)
{
Log.Warning("Cannot set property '{0}', object is currently read-only", property.Name);
return;
}
}
if (property.IsCalculatedProperty)
{
Log.Warning("Cannot set property '{0}', the property is a calculated property", property.Name);
return;
}
if ((value != null) && !property.Type.IsInstanceOfTypeEx(value))
{
if (!value.GetType().IsCOMObjectEx())
{
throw Log.ErrorAndCreateException(msg => new InvalidPropertyValueException(property.Name, property.Type, value.GetType()),
"Cannot set value '{0}' to property '{1}' of type '{2}', the value is invalid", value, property.Name, GetType().FullName);
}
}
var notify = false;
TValue oldValue;
lock (_lock)
{
var changeNotificationsSuspensionContext = _changeNotificationsSuspensionContext;
oldValue = GetValueFromPropertyBag <TValue>(property.Name);
var areOldAndNewValuesEqual = ObjectHelper.AreEqualReferences(oldValue, value);
if (!areOldAndNewValuesEqual)
{
SetValueToPropertyBag(property.Name, value);
}
notify = (notifyOnChange && (AlwaysInvokeNotifyChanged || !areOldAndNewValuesEqual));
if (changeNotificationsSuspensionContext != null)
{
changeNotificationsSuspensionContext.Add(property.Name);
notify = false;
}
}
// Notify outside lock
if (notify)
{
RaisePropertyChanged(property.Name, BoxingCache.GetBoxedValue(oldValue), BoxingCache.GetBoxedValue(value));
}
}
