File functions

function FileSize(FileName: string): Integer;

Returns the size of the file.

function FileExists(FileName: string): Boolean;

Checks if the file exists.

function ExtractFileName(FileName: string): string;

Returns the file name portion of the entered name.  E.g. ExtractFileName('d:\temp\myfile.txt') returns 'myfile.txt'.

function ExtractFilePath(FileName: string): string;

Returns the file path portion of the entered name.  E.g. ExtractFileName('d:\temp\myfile.txt') returns 'd:\temp\'.

function ReplaceFilePath(FileName: string; NewExtension: string): string;

Replaces the current path with the new path.  E.g. ReplaceFileExt('d:\temp\myfile.txt', 'g:\uploads\') returns 'g:\uploads\myfile.txt'.

function ExtractFileExt(FileName: string): string;

Returns the file extension of the entered name.  E.g. ExtractFileName('d:\temp\myfile.txt') returns '.txt'.

function ReplaceFileExt(FileName, NewExtension: string): string;

Returns the file name replaced with the new extension.  E.g. ReplaceFileExt('d:\temp\myfile.doc', '.zip') returns 'd:\temp\myfile.zip'

function CopyFile(Source: string; Target: string; OverwriteExisting: Boolean = False): Boolean;

Copies the Source file to the Target name.  Returns True if the operation succeeds.

function MoveFile(Source: string; TargetFolder: string; OverwriteExisting: Boolean = False): Boolean;

Moves the Source file to the TargetFolder folder.  Returns True if the operation succeeds.

function DeleteFile(FileName: string): Boolean;

Deletes the specified file.  Returns True if the operation succeeds.

function DirectoryExists(Directory: string): Boolean;

Checks if the Directory folder exists.

function CreateDirectory(Directory: string): Boolean;

Creates the Directory folder.  All upper level folders must already exist.  Otherwise, use the ForceDirectories function.

function ForceDirectories(Directory: string): Boolean;

Creates the Directory folder and all upper level folders where required.

function GetFileCreationTimestamp(FileName: string): string;

Returns the timestamp FileName was created.  See this topic on how to convert the timestamp value to string representations.

function GetFileLastWriteTimestamp(FileName: string): string;

Returns the timestamp FileName was last modified.  See this topic on how to convert the timestamp value to string representations.

function CompressFile(FileName: string; ArchiveFileName: string; CompressionLevel: Integer; var Error: string): Boolean;

Compresses the file and stores it in the named archive file.  If the ArchiveFileName has the 'zip' extension, a zip archive is created.  If the ArchiveFileName has the '7z' extension, a 7-zip archive is created.  In most cases, 7-zip archives offer better compression that zip archives.  Compression levels can have the values 0 (no compression) to 9 (maximum compression).  Returns True if the operation succeeds.  If the operation fails, the error message is returned in the Error parameter.

function CompressFileWithPassword(FileName: string; ArchiveFileName: string; CompressionLevel: Integer; Password: string; var Error: string): Boolean;

Similar to the above, but protects the archive with the entered Password.

function GetFileContentAsText(FileName: string): string;

Returns the contents as a file in a text string.  This is useful when you want to upload files/columns containing plain text into a text field.