OPC Studio User's Guide and Reference
IsPrefix Method (_UABrowsePathElementCollection)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.Navigation.ComTypes Namespace > _UABrowsePathElementCollection Interface : IsPrefix Method
A OpcLabs.EasyOpc.UA.Navigation.UABrowsePathElementCollection object. The browse path element collection to be tested as a prefix.
Determines whether a given OPC-UA browse path element collection is a prefix of the current browse path element collection.
Syntax
'Declaration
 
Function IsPrefix( _
   ByVal prefix As Object _
) As Boolean
'Usage
 
Dim instance As _UABrowsePathElementCollection
Dim prefix As Object
Dim value As Boolean
 
value = instance.IsPrefix(prefix)
bool IsPrefix( 
   object prefix
)
bool IsPrefix( 
   Object^ prefix
) 

Parameters

prefix
A OpcLabs.EasyOpc.UA.Navigation.UABrowsePathElementCollection object. The browse path element collection to be tested as a prefix.

Return Value

True if the given browse path element collection is a prefix of the current browse path element collection; false otherwise.
Exceptions
ExceptionDescription

A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

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