Initializes a new instance of the
DAItemDescriptor class.Initializes a new instance of the class, with specified node path (may be null), item identifier (may be null), browse path (may be empty), data type and access path.
Syntax
'Declaration
Public Function New( _
ByVal As String, _
ByVal As String, _
ByVal As BrowsePath, _
ByVal As VarType, _
ByVal As String _
)
'Usage
Dim nodePath As String
Dim itemId As String
Dim browsePath As BrowsePath
Dim requestedDataType As VarType
Dim accessPath As String
Dim instance As New DAItemDescriptor(nodePath, itemId, browsePath, requestedDataType, accessPath)
public DAItemDescriptor(
string ,
string ,
BrowsePath ,
VarType ,
string
)
public:
DAItemDescriptor(
String^ ,
String^ ,
BrowsePath^ ,
VarType^ ,
String^
)
Parameters
- nodePath
- Contains node path (empty string for the root, null reference if unknown). Only used with OPC XML.
- itemId
- Contains OPC item identifier.
- browsePath
- Contains the browse path for the OPC item.
- requestedDataType
- Specifies the data type requested. Passing OpcLabs.BaseLib.ComInterop.VarTypes.Empty means that the server's canonical data type should be used.
- accessPath
- An optional data path suggestion to the server.
Exceptions
Exception | Description |
System.ArgumentException |
One of the arguments provided to a method is not valid.
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. |
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. |
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