QuickOPC User's Guide and Reference
MoveOrCopy(IEasyUAFileTransfer,UAEndpointDescriptor,UANamedNodePath,String,UANodeId,Boolean) Method



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.FileTransfer Namespace > IEasyUAFileTransferExtension Class > MoveOrCopy Method : MoveOrCopy(IEasyUAFileTransfer,UAEndpointDescriptor,UANamedNodePath,String,UANodeId,Boolean) Method
The OPC UA file transfer object that will perform the operation.
Endpoint descriptor. Identifies the OPC-UA server.
A named node path of the OPC UA directory.
A name of an existing OPC UA file or directory.
The node Id of the target directory of the move or copy operation.
A flag indicating if a copy of the file or directory should be created at the target directory.
Moves or copies an OPC UA file or directory to another directory, or renames a file or directory.
Syntax
'Declaration
 
<ExtensionAttribute()>
<NotNullAttribute()>
Public Overloads Shared Function MoveOrCopy( _
   ByVal fileTransfer As IEasyUAFileTransfer, _
   ByVal endpointDescriptor As UAEndpointDescriptor, _
   ByVal directoryNamedNodePath As UANamedNodePath, _
   ByVal existingFileOrDirectoryName As String, _
   ByVal newDirectoryNodeId As UANodeId, _
   ByVal copyObject As Boolean _
) As UANodeId
'Usage
 
Dim fileTransfer As IEasyUAFileTransfer
Dim endpointDescriptor As UAEndpointDescriptor
Dim directoryNamedNodePath As UANamedNodePath
Dim existingFileOrDirectoryName As String
Dim newDirectoryNodeId As UANodeId
Dim copyObject As Boolean
Dim value As UANodeId
 
value = IEasyUAFileTransferExtension.MoveOrCopy(fileTransfer, endpointDescriptor, directoryNamedNodePath, existingFileOrDirectoryName, newDirectoryNodeId, copyObject)

Parameters

fileTransfer
The OPC UA file transfer object that will perform the operation.
endpointDescriptor
Endpoint descriptor. Identifies the OPC-UA server.
directoryNamedNodePath
A named node path of the OPC UA directory.
existingFileOrDirectoryName
A name of an existing OPC UA file or directory.
newDirectoryNodeId
The node Id of the target directory of the move or copy operation.
copyObject
A flag indicating if a copy of the file or directory should be created at the target directory.

Return Value

Returns the node Id of the moved or copied object. Even if the object is moved, the server may return a new node Id for it.
Exceptions
ExceptionDescription

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.

The OPC UA operation has failed. This operation exception in uniformly used to allow common handling of various kinds of errors. The System.Exception.InnerException always contains information about the actual error cause.

This is an operation error that depends on factors external to your program, and thus cannot be always avoided. Your code must handle it appropriately.

Remarks

This method internally uses the OPC UA File Transfer Method .

The directoryNamedNodePath must refer to an existing node in the server, of object type OpcLabs.EasyOpc.UA.AddressSpace.Standard.UAObjectTypeIds.FileDirectoryType.

Recommendation: Whenever possible, do not use this method directly, and use a higher-level abstraction instead. You can obtain a writable file provider (using GetWritableFileProvider), and make use of its methods, and methods available on the writable directory contents (obtained using OpcLabs.BaseLib.Extensions.FileProviders.IWritableDirectory.GetWritableDirectoryContents) or writable file info (obtained using OpcLabs.BaseLib.Extensions.FileProviders.IWritableDirectory.GetWritableFileInfo).

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