QuickOPC User's Guide and Reference
GetMultipleFileProperties Method (IEasyUAFileTransfer)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.FileTransfer Namespace > IEasyUAFileTransfer Interface : GetMultipleFileProperties Method
An array of arguments specifying the server endpoints and node descriptors of the file object nodes.
Gets properties (metadata) of multiple OPC UA files, specified by their file object nodes.
Syntax
'Declaration
 
<ElementsNotNullAttribute()>
<NotNullAttribute()>
Function GetMultipleFileProperties( _
   ByVal fileNodeArgumentsArray As IReadOnlyList(Of UANodeArguments) _
) As ValueResult(Of UAFileProperties)()
'Usage
 
Dim instance As IEasyUAFileTransfer
Dim fileNodeArgumentsArray As IReadOnlyList(Of UANodeArguments)
Dim value() As ValueResult(Of UAFileProperties)
 
value = instance.GetMultipleFileProperties(fileNodeArgumentsArray)
[ElementsNotNull()]
[NotNull()]
ValueResult<UAFileProperties>[] GetMultipleFileProperties( 
   IReadOnlyList<UANodeArguments> fileNodeArgumentsArray
)
[ElementsNotNull()]
[NotNull()]
array<ValueResult<UAFileProperties^>^>^ GetMultipleFileProperties( 
   IReadOnlyList<UANodeArguments^>^ fileNodeArgumentsArray
) 

Parameters

fileNodeArgumentsArray
An array of arguments specifying the server endpoints and node descriptors of the file object nodes.

Return Value

Returns an array of value result objects. Each element of the array corresponds to the element with the same index in the fileNodeArgumentsArray, and it contains either a UAFileProperties object with the file properties (metadata), or a failure indications (in the OpcLabs.BaseLib.OperationModel.OperationResult.Exception property.
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.

Remarks

This method does not throw the OpcLabs.EasyOpc.UA.OperationModel.UAException. Failures related to each operand are indicated in the returned OpcLabs.BaseLib.OperationModel.Generic.ValueResult<T> objects.

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

Reference

IEasyUAFileTransfer Interface
IEasyUAFileTransfer Members
GetFileProperties(IEasyUAFileTransfer,UAEndpointDescriptor,UANodeDescriptor) Method
OpcLabs.EasyOpc.UA.FileTransfer.IEasyUAFileTransferExtension.GetMultipleFileProperties(OpcLabs.EasyOpc.UA.FileTransfer.IEasyUAFileTransfer,OpcLabs.EasyOpc.UA.UAEndpointDescriptor,System.Collections.Generic.IReadOnlyList{OpcLabs.EasyOpc.UA.UANodeDescriptor})
UAFileProperties Class