OPC Studio User's Guide and Reference
FromString Method (DANodeDescriptor)



OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.DataAccess Namespace > DANodeDescriptor Class : FromString Method
Contains OPC item identifier (empty string for the root or if unknown).

The value of this parameter can be null (Nothing in Visual Basic).

Converts a string containing an item Id to a DANodeDescriptor object.
Syntax
'Declaration
 
<CanBeNullAttribute()>
Public Shared Function FromString( _
   ByVal itemId As String _
) As DANodeDescriptor
'Usage
 
Dim itemId As String
Dim value As DANodeDescriptor
 
value = DANodeDescriptor.FromString(itemId)
[CanBeNull()]
public static DANodeDescriptor FromString( 
   string itemId
)
[CanBeNull()]
public:
static DANodeDescriptor^ FromString( 
   String^ itemId
) 

Parameters

itemId
Contains OPC item identifier (empty string for the root or if unknown).

The value of this parameter can be null (Nothing in Visual Basic).

Return Value

Returns a DANodeDescriptor converted from the input argument.

This method can return null (Nothing in Visual Basic).

Remarks

In languages that support implicit conversions (such as C# or VB.NET), in many cases you do not have call this method explicitly. When indicated, a call to an available equivalent implicit conversion operator will be created by the compiler automatically.

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