QOpcUaDataValue Class

This class stores OPC UA value data and associated metadata. 更多...

头：	#include <QOpcUaDataValue>
CMake:	find_package(Qt6 REQUIRED COMPONENTS OpcUa) target_link_libraries(mytarget PRIVATE Qt6::OpcUa)
qmake:	QT += opcua
Since:	Qt 6.3

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公共函数

	QOpcUaDataValue ()
	QOpcUaDataValue (const QOpcUaDataValue & other )
	~QOpcUaDataValue ()
(从 6.7 起) quint16	serverPicoseconds () const
QDateTime	serverTimestamp () const
(从 6.7 起) void	setServerPicoseconds (quint16 serverPicoseconds )
void	setServerTimestamp (const QDateTime & serverTimestamp )
(从 6.7 起) void	setSourcePicoseconds (quint16 sourcePicoseconds )
void	setSourceTimestamp (const QDateTime & sourceTimestamp )
void	setStatusCode (QOpcUa::UaStatusCode statusCode )
void	setValue (const QVariant & value )
(从 6.7 起) quint16	sourcePicoseconds () const
QDateTime	sourceTimestamp () const
QOpcUa::UaStatusCode	statusCode () const
void	swap (QOpcUaDataValue & other )
QVariant	value () const
(从 6.7 起) QVariant	operator QVariant () const
QOpcUaDataValue &	operator= (const QOpcUaDataValue & other )

相关非成员

(从 6.7 起) bool	operator!= (const QOpcUaDataValue & lhs , const QOpcUaDataValue & rhs )
(从 6.7 起) bool	operator== (const QOpcUaDataValue & lhs , const QOpcUaDataValue & rhs )

详细描述

This class corresponds to the OPC UA DataValue type.

成员函数文档编制

QOpcUaDataValue:: QOpcUaDataValue ()

Constructs an invalid data value.

QOpcUaDataValue:: QOpcUaDataValue (const QOpcUaDataValue & other )

Constructs a data value from other .

[noexcept] QOpcUaDataValue:: ~QOpcUaDataValue ()

Destroys the data value.

[since 6.7] quint16 QOpcUaDataValue:: serverPicoseconds () const

Returns the number of 10 picosecond intervals for the server timestamp.

该函数在 Qt 6.7 引入。

另请参阅 setServerPicoseconds ().

QDateTime QOpcUaDataValue:: serverTimestamp () const

Returns the server timestamp for value ().

另请参阅 setServerTimestamp ().

[since 6.7] void QOpcUaDataValue:: setServerPicoseconds ( quint16 serverPicoseconds )

Sets the number of 10 picosecond intervals for the server timestamp to serverPicoseconds .

该函数在 Qt 6.7 引入。

另请参阅 serverPicoseconds ().

void QOpcUaDataValue:: setServerTimestamp (const QDateTime & serverTimestamp )

Sets the server timestamp to serverTimestamp .

另请参阅 serverTimestamp ().

[since 6.7] void QOpcUaDataValue:: setSourcePicoseconds ( quint16 sourcePicoseconds )

Sets the number of 10 picosecond intervals for the source timestamp to sourcePicoseconds .

该函数在 Qt 6.7 引入。

另请参阅 sourcePicoseconds ().

void QOpcUaDataValue:: setSourceTimestamp (const QDateTime & sourceTimestamp )

Sets the source timestamp to sourceTimestamp .

另请参阅 sourceTimestamp ().

void QOpcUaDataValue:: setStatusCode ( QOpcUa::UaStatusCode statusCode )

Sets the status code to statusCode .

另请参阅 statusCode ().

void QOpcUaDataValue:: setValue (const QVariant & value )

Sets the value to value .

If this data value is to be used with QOpcUaBinaryDataEncoding or QOpcUaGenericStructHandler , the value's type must be QOpcUaVariant .

另请参阅 value ().

[since 6.7] quint16 QOpcUaDataValue:: sourcePicoseconds () const

Returns the number of 10 picosecond intervals for the source timestamp.

该函数在 Qt 6.7 引入。

另请参阅 setSourcePicoseconds ().

QDateTime QOpcUaDataValue:: sourceTimestamp () const

Returns the source timestamp for value ().

另请参阅 setSourceTimestamp ().

QOpcUa::UaStatusCode QOpcUaDataValue:: statusCode () const

Returns the status code for this data value. If the status code is not Good , the value and the timestamps are invalid.

另请参阅 setStatusCode ().

[noexcept] void QOpcUaDataValue:: swap ( QOpcUaDataValue & other )

Swaps this data value instance with other 。此函数非常快且从不失败。

QVariant QOpcUaDataValue:: value () const

Returns the value.

另请参阅 setValue ().

[since 6.7] QVariant QOpcUaDataValue:: operator QVariant () const

返回 QVariant containing this data value.

该函数在 Qt 6.7 引入。

QOpcUaDataValue &QOpcUaDataValue:: operator= (const QOpcUaDataValue & other )

设置值从 other in this data value.

相关非成员

[noexcept, since 6.7] bool operator!= (const QOpcUaDataValue & lhs , const QOpcUaDataValue & rhs )

返回 true if lhs 不等于 rhs .

该函数在 Qt 6.7 引入。

[noexcept, since 6.7] bool operator== (const QOpcUaDataValue & lhs , const QOpcUaDataValue & rhs )

返回 true if lhs 等于 rhs .

该函数在 Qt 6.7 引入。

内容

• 公共函数

• 相关非成员

• 详细描述