QuickOPC User's Guide and Reference
DABrowseParameters Constructor(DABrowseFilter,String,String,VarType)



OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.DataAccess Namespace > DABrowseParameters Class > DABrowseParameters Constructor : DABrowseParameters Constructor(DABrowseFilter,String,String,VarType)
Specifies which subset of browse elements to return.
A wildcard string to filter the returned element names (empty string for no filtering)
A server specific filter string (empty string for no filtering)
Specifies the data type filter. Passing OpcLabs.BaseLib.ComInterop.VarTypes.Empty will cause nodes of all data types be returned.
Initializes a new instance of the DABrowseParameters class.Initializes a new instance of the class, with specified browse filter, element name filter, vendor filter, and data type filter.
Syntax
'Declaration
 
Public Function New( _
   ByVal browseFilter As DABrowseFilter, _
   ByVal elementNameFilter As String, _
   ByVal vendorFilter As String, _
   ByVal dataTypeFilter As VarType _
)
'Usage
 
Dim browseFilter As DABrowseFilter
Dim elementNameFilter As String
Dim vendorFilter As String
Dim dataTypeFilter As VarType
 
Dim instance As New DABrowseParameters(browseFilter, elementNameFilter, vendorFilter, dataTypeFilter)

Parameters

browseFilter
Specifies which subset of browse elements to return.
elementNameFilter
A wildcard string to filter the returned element names (empty string for no filtering)
vendorFilter
A server specific filter string (empty string for no filtering)
dataTypeFilter
Specifies the data type filter. Passing OpcLabs.BaseLib.ComInterop.VarTypes.Empty will cause nodes of all data types be returned.
Exceptions
ExceptionDescription

One of the arguments provided to a method is not valid.

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.

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.

An invalid enumeration value was used.

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