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



OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.DataAccess Namespace > DAItemDescriptor Class : FromString Method
Contains OPC item identifier.

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

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

Parameters

itemId
Contains OPC item identifier.

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

Return Value

Returns a DAItemDescriptor 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.

This method or property does not throw any exceptions, aside from execution exceptions such as System.Threading.ThreadAbortException or System.OutOfMemoryException.

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