LiteralOperand QML Type

The OPC UA LiteralOperand type. 更多...

import 語句：	import QtOpcUa.
Since:	QtOpcUa 5.13

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特性

type : QOpcUa.Types
value : variant

詳細描述

The LiteralOperand is defined in OPC-UA part 4, 7.4.4.3. It contains a literal value that is to be used as operand for filters.

Setting the type should be done to match the expected types on the server. Otherwise the type will be guessed and may lead to errors because it does not match on the server.

import QtOpcUa 5.13 as QtOpcUa
QtOpcUa.LiteralOperand {
    value: 43.21
    type: QtOpcUa.Constants.Double
}

特性文檔編製

type : QOpcUa . 類型

Type of the value of the literal operand.

value : variant

Value of the literal operand.