DiscoverNetworkServers() Method

Discovers available OPC-UA servers on the network and returns information about them, using the default discovery host.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<JetBrains.Annotations.ItemNotNullAttribute()>
<JetBrains.Annotations.NotNullAttribute()>
Public Overloads Function DiscoverNetworkServers() As UADiscoveryElementCollection

'Usage
 
Dim instance As EasyUAClientCore
Dim value As UADiscoveryElementCollection
 
value = instance.DiscoverNetworkServers()

[JetBrains.Annotations.ItemNotNull()]
[JetBrains.Annotations.NotNull()]
public UADiscoveryElementCollection DiscoverNetworkServers()

[JetBrains.Annotations.ItemNotNull()]
[JetBrains.Annotations.NotNull()]
public:
UADiscoveryElementCollection^ DiscoverNetworkServers();

Return Value

Returns a collection of application elements (usually servers, OpcLabs.EasyOpc.UA.Discovery.UADiscoveryElement).

This method never returns null (Nothing in Visual Basic).

The individual elements of the returned value are never null (Nothing in Visual Basic).

Exceptions

Exception	Description
System.ObjectDisposedException	An operation was performed on a disposed object.

Remarks

This method uses the so-called Local Discovery Server (LDS). You can influence how the discovery works using the properties in SharedParameters. The name of the machine that runs the discovery is determined by OpcLabs.EasyOpc.UA.Engine.EasyUAClientInstanceParameters.DiscoveryHost in InstanceParameters, and defaults to "localhost".

Invokes the FindServersOnNetwork service.

See also in Knowledge Base: Technical note-OPC UA Discovery in QuickOPC.

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

EasyUAClientCore Class
EasyUAClientCore Members
Overload List
DiscoveryTimeout Property

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