IsPrefix Method (_BrowsePath)

The browse path to be tested as a prefix.

Because the OpcLabs.BaseLib.Navigation.BrowsePath has an implicit conversion from System.String, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a string (containing an absolute browse path to be parsed) in place of this parameter, and the corresponding browse path object will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the FromString static method instead. CAUTION: Parsing the browse path can throw OpcLabs.BaseLib.Navigation.Parsing.BrowsePathFormatException.

The value of this parameter cannot be null (Nothing in Visual Basic).

Determines whether a given browse path is a prefix of the current browse path.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Function IsPrefix( _
   ByVal prefix As Object _
) As Boolean

'Usage
 
Dim instance As _BrowsePath
Dim prefix As Object
Dim value As Boolean
 
value = instance.IsPrefix(prefix)

bool IsPrefix( 
   object prefix
)

bool IsPrefix( 
   Object^ prefix
)

Parameters

prefix

The browse path to be tested as a prefix.

The value of this parameter cannot be null (Nothing in Visual Basic).

Return Value

True if the given browse path is a prefix of the current browse path; false otherwise.

Exceptions

Exception Description

Exception	Description
System.ArgumentNullException	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.

System.ArgumentNullException

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.

Remarks

This member or type is for use from COM. It is not meant to be used from .NET or Python. Refer to the corresponding .NET member or type instead, if you are developing in .NET or Python.

This method is pure, i.e. it does not have observable side effects.

Requirements

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

Reference

_BrowsePath Interface
_BrowsePath Members

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