BrowseServers Method (IEasyDAClient)

Browses the specified computer and returns information about OPC (Data Access) servers found.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<ElementsNotNullAttribute()>
<NotNullAttribute()>
Function BrowseServers( _
   ByVal location As String, _
   ByVal technologies As OpcTechnologies _
) As ServerElementCollection

'Usage
 
Dim instance As IEasyDAClient
Dim location As String
Dim technologies As OpcTechnologies
Dim value As ServerElementCollection
 
value = instance.BrowseServers(location, technologies)

[ElementsNotNull()]
[NotNull()]
ServerElementCollection BrowseServers( 
   string location,
   OpcTechnologies technologies
)

[ElementsNotNull()]
[NotNull()]
ServerElementCollection^ BrowseServers( 
   String^ location,
   OpcTechnologies technologies
)

Parameters

location: Name of the machine. Determines the computer to browse for OPC servers. May be an empty string, in which case the local computer will be browsed.
technologies: The OPC technologies to be used for server browsing.

Return Value

The method returns a keyed collection of OpcLabs.EasyOpc.ServerElement values, each containing information about a particular OPC server found on the specified machine. The keys of the keyed collection are the server's CLSIDs.

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.
OpcLabs.EasyOpc.OperationModel.OpcException	The OPC "Classic" (or OPC XML-DA) operation has failed. This operation exception in uniformly used to allow common handling of various kinds of errors. The System.Exception.InnerException always contains information about the actual error cause. This is an operation error that depends on factors external to your program, and thus cannot be always avoided. Your code must handle it appropriately.

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.

OpcLabs.EasyOpc.OperationModel.OpcException

The OPC "Classic" (or OPC XML-DA) operation has failed. This operation exception in uniformly used to allow common handling of various kinds of errors. The System.Exception.InnerException always contains information about the actual error cause.

This is an operation error that depends on factors external to your program, and thus cannot be always avoided. Your code must handle it appropriately.

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

IEasyDAClient Interface
IEasyDAClient Members

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