Interface ITcFileAccess

Interface to access file system from TwinCAT C++ modules

Syntax


TCOM_DECL_INTERFACE("742A7429-DA6D-4C1D-80D8-398D8C1F1747", ITcFileAccess) __declspec(novtable) ITcFileAccess: public ITcUnknown

Required include: TcFileAccessInterfaces.h

Methods

Name	Description
FileOpen	Opens a file.
FileClose	Closes a file.
FileRead	Reads from a file.
FileWrite	Writes to a file.
FileSeek	Sets position in a file.
FileTell	Queries position in a file.
FileRename	Renames a file.
FileDelete	Deletes a file.
FileGetStatus	Gets the status of a file.
FileFindFirst	Searches for a file, first iteration.
FileFindNext	Searches for a file, next iteration.
FileFindClose	Closes a file search.
MkDir	Creates a directory.
RmDir	Deletes a directory.

Remarks

The ITcFileAccess interface used to access files from file systems.
Since the provided methods are blocking this should not be used in CycleUpdate() / realtime context. The derived interface ITcFileAccessAsync adds a Check() Method, which could be used instead.

Please have a look at Sample20a: FileIO-Cyclic Read / Write.

The interface is implemented by module class CID_TcFileAccess.

Further Information