Library functions for file operations provided by BCB

A function of file manipulation is also provided in BCB, the functions of these functions are roughly the same as those described earlier, but these functions are closely related to BCB and can use data types such as the ansistring in BCB, which is the most convenient way to file operations in BCB, and I'll introduce this file operation in detail below.

In the BCB provided by this set of file operation functions, can be divided into three types, namely: 1, File name functions, 2, File management functions, 3, file I/O functions.

1. File name function

The filename function can operate on the name of the file, the subdirectory, the drive, and the extension. The following table lists these functions and their functions.

Function description

Expandfilename () returns the full path of the file (including drive, path)

Extractfileext () Extract the extension from the file name

Extractfilename () Extract filename without path from file name

Extractfilepath () Extract path name from file name

Extractfiledir () Extract the directory name from the file name

Extractfiledrive () Extract the drive name from the file name

Changefileext () Change the file name extension

Expanduncfilename () returns the full path to the file containing the network drive

Extractrelativepath () Extract relative path information from the file name

Extractshortpathname () Converts the file name to DOS 8 3 format

Matchesmask () checks whether the file matches the specified file name format

Here's a description of these functions:

⑴expandfilename ()

Prototype: extern PACKAGE ansistring __fastcall expandfilename (const ansistring FileName);

Function: Returns the full path of the file (including drive, path)

Parameters: FileName: filename to be processed

Example: ShowMessage (Expandfilename (Application->exename));//Display your program file name, such as C:\MyBCB\Sample1.EXE