Reference

OpcFileGetPositionMethodNode.FileGetPositionExCallback Delegate

Namespace

Opc.UaFx

Assembly

Opc.UaFx.Advanced.dll

Package

Opc.UaFx.Advanced v2.59.0

GetPosition is used to provide the current position of the file handle.

Syntax

[CLSCompliant(false)]
public delegate ulong OpcFileGetPositionMethodNode.FileGetPositionExCallback(
    OpcMethodContext context,
    uint fileHandle)

<CLSCompliant(False)>
Public Delegate Function OpcFileGetPositionMethodNode.FileGetPositionExCallback(
    context As OpcMethodContext,
    fileHandle As UInteger) As ULong

Parameters

Name	Type	Description
context	OpcMethodContext	The OpcMethodContext to use when querying the position in the file. This instance will be also updated with the outcome of the method call.
fileHandle	UInt32	A file handle indicating the access request and thus indirectly the position inside the file.

Returns

UInt64

The position of the file handle in the file. If a Read or Write is called it starts at that position.

Remarks

This method does provide the following OpcResult information:

• BadInvalidArgumentThe file handle specified by fileHandle or the SessionId is not known.
• BadUnexpectedErrorAn unexpected error occurred while querying the position in the file.

Applies to

Package	Versions
Opc.UaFx.Advanced	v2.5–v2.59