Reference

OpcFileWriteMethodNode.FileWriteExCallback Delegate

Namespace

Opc.UaFx

Assembly

Opc.UaFx.Advanced.dll

Package

Opc.UaFx.Advanced v2.59.0

Write is used to write a part of the file starting from the current file position. The file position is advanced by the number of bytes written.

Syntax

[CLSCompliant(false)]
public delegate void OpcFileWriteMethodNode.FileWriteExCallback(
    OpcMethodContext context,
    uint fileHandle,
    ByteString data)

<CLSCompliant(False)>
Public Delegate Sub OpcFileWriteMethodNode.FileWriteExCallback(
    context As OpcMethodContext,
    fileHandle As UInteger,
    data As ByteString)

Parameters

Name	Type	Description
context	OpcMethodContext	The OpcMethodContext to use when writing data to 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.
data	ByteString	Contains the data to be written at the position of the file. It is server-dependent whether the written data are persistently stored if the session is ended without calling the Close Method with the file handle.

Remarks

This method does provide the following OpcResult information:

• BadInvalidArgumentThe file handle specified by fileHandle or the SessionId is not known.
• BadNotWritableThe file might be locked and thus not writable. This is also the case there neither 'CanWrite' nor 'CanUserWrite' grant write access.
• BadUnexpectedErrorAn unexpected error occurred while writing the file.
• BadInvalidStateThe file was not opened for write access.

Applies to

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