OPC Studio User's Guide and Reference
AsUnionData Method (_EnumerationData)



OpcLabs.BaseLib Assembly > OpcLabs.BaseLib.DataTypeModel.ComTypes Namespace > _EnumerationData Interface : AsUnionData Method
The current generic data expressed as data of union data type.
Syntax
'Declaration
 

<CanBeNullAttribute()>
Function AsUnionData() As UnionData
'Usage
 

Dim instance As _EnumerationData
Dim value As UnionData
 
value = instance.AsUnionData()
[CanBeNull()]
UnionData AsUnionData()
[CanBeNull()]
UnionData^ AsUnionData();
Remarks

Returns null if the current generic data is not of union data type.

This method has been introduced primarily for languages like PHP that do not allow down-casting.

Classes derived from OpcLabs.BaseLib.DataTypeModel.GenericData form following class hierarchy:

.

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also

Reference

_EnumerationData Interface
_EnumerationData Members

 

 

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