/// <summary> /// Update species fact field. /// </summary> /// <param name="hasValue">Indication if value has been set.</param> /// <param name="value">New value.</param> public void Update(Boolean hasValue, Object value) { HasValue = hasValue; if (HasValue) { if (IsTextField) { if (value.IsNull()) { _stringValue = null; } else { _stringValue = value.ToString(); } } else { _numericValue = (Double)value; _stringValue = null; } } OldHasValue = hasValue; if (OldHasValue) { OldValue = Value; if (OldValue.IsNull()) { HasValue = false; OldHasValue = false; } } else { OldValue = null; } }