OPC Studio User's Guide and Reference
GetProperty Method



OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.DataAccess.Extensions Namespace > DAItemPropertyRecord Class : GetProperty Method
The Id of OPC property to be retrieved.

Because the OpcLabs.EasyOpc.DataAccess.DAPropertyId has an implicit conversion from System.Int64 and OpcLabs.EasyOpc.DataAccess.DAPropertyIds, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a long integer (representing the numerical value of the access rights), or an element of the OpcLabs.EasyOpc.DataAccess.DAPropertyIds enumeration in place of this parameter, and the corresponding Property Id specification will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the DAPropertyId Constructor(Int64) or DAPropertyId Constructor(DAPropertyIds) constructor instead.

The value of this parameter cannot be null (Nothing in Visual Basic).

Obtains a property value from this structure for an OPC property specified by its Id.
Syntax
'Declaration
 
<CanBeNullAttribute()>
Public Function GetProperty( _
   ByVal propertyId As DAPropertyId _
) As Object
'Usage
 
Dim instance As DAItemPropertyRecord
Dim propertyId As DAPropertyId
Dim value As Object
 
value = instance.GetProperty(propertyId)
[CanBeNull()]
public object GetProperty( 
   DAPropertyId propertyId
)
[CanBeNull()]
public:
Object^ GetProperty( 
   DAPropertyId^ propertyId
) 

Parameters

propertyId
The Id of OPC property to be retrieved.

Because the OpcLabs.EasyOpc.DataAccess.DAPropertyId has an implicit conversion from System.Int64 and OpcLabs.EasyOpc.DataAccess.DAPropertyIds, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a long integer (representing the numerical value of the access rights), or an element of the OpcLabs.EasyOpc.DataAccess.DAPropertyIds enumeration in place of this parameter, and the corresponding Property Id specification will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the DAPropertyId Constructor(Int64) or DAPropertyId Constructor(DAPropertyIds) constructor instead.

The value of this parameter cannot be null (Nothing in Visual Basic).

Return Value

The value of OPC property.

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

Remarks
Throws an exception if the structure does not contain a value for a specified OPC property.
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