Opc.Ua.BaseVariableTypeState.WriteValueAttribute C# (CSharp) Method

        protected override ServiceResult WriteValueAttribute(
            ISystemContext context,
            NumericRange indexRange,
            object value,
            StatusCode statusCode,
            DateTime sourceTimestamp)
        {
            ServiceResult result = null;

            if ((WriteMask & AttributeWriteMask.ValueForVariableType) == 0)
            {
                return StatusCodes.BadNotWritable;
            }

            // ensure the source timestamp has a valid value.
            if (sourceTimestamp == DateTime.MinValue)
            {
                sourceTimestamp = DateTime.UtcNow;
            }

            // index range writes not supported.
            if (indexRange != NumericRange.Empty)
            {
                return StatusCodes.BadIndexRangeInvalid;
            }

            // verify data type.
            TypeInfo typeInfo = TypeInfo.IsInstanceOfDataType(
                value,
                m_dataType,
                m_valueRank,
                context.NamespaceUris,
                context.TypeTable);

            if (typeInfo == null || typeInfo == TypeInfo.Unknown)
            {
                return StatusCodes.BadTypeMismatch;
            }

            // check for simple write value handler.
            if (OnSimpleWriteValue != null)
            {
                result = OnSimpleWriteValue(
                    context,
                    this,
                    ref value);

                if (ServiceResult.IsBad(result))
                {
                    return result;
                }
            }

            // update cached values.
            Value = value;

            return ServiceResult.Good;
        }
        #endregion