Reference

OpcFileReadMethodNode.FileReadCallback Delegate

Namespace

Opc.UaFx

Assembly

Opc.UaFx.Advanced.dll

Package

Opc.UaFx.Advanced v2.59.0

Read is used to read a part of the file starting from the current file position. The file position is advanced by the number of bytes read.

Syntax

[CLSCompliant(false)]
public delegate ByteString OpcFileReadMethodNode.FileReadCallback(
    uint fileHandle,
    int length)

<CLSCompliant(False)>
Public Delegate Function OpcFileReadMethodNode.FileReadCallback(
    fileHandle As UInteger,
    length As Integer) As ByteString

Parameters

Name	Type	Description
fileHandle	UInt32	A file handle indicating the access request and thus indirectly the position inside the file.
length	Int32	Defines the length in byte that should be returned in data, starting from the current position of the file handle. If the end of file is reached only all data till the end of the file are returned. If the specified length is longer than the maximum allowed message size of the communication, only those data fitting into the message size are returned. Only positive values are allowed.

Returns

ByteString

Contains the returned data of the file.

Applies to

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