File Input and Output Support

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This topic lists all routines and variables involved in file IO support.

Member	Description
System.Append	Prepares an existing file for adding text to the end.
System.Assign	Associates the name of an external file with a file variable.
System.AssignFile	Associates the name of an external file with a file variable.
System.BlockRead	Reads one or more records from an open file into a variable.
System.BlockWrite	Writes one or more records from a variable to an open file.
System.Close	Terminates the association between a file variable and an external file.
System.CloseFile	Terminates the association between a file variable and an external disk file.
System.SysUtils.DeleteFile	Deletes a file from disk.
System.Eof	Tests whether the file position is at the end of a file.
System.Eoln	Tests whether the file pointer is at the end of a line.
System.Erase	Deletes an external file.
System.ErrOutput	Specifies a write-only text file associated with the process's error output file.
System.SysUtils.FileAge	Returns the OS timestamp of a file.
System.SysUtils.FileClose	Closes a specified file.
System.SysUtils.FileCreate	Creates a new file.
System.SysUtils.FileDateToDateTime	Converts an OS timestamp value to a TDateTime value.
System.SysUtils.FileExists	Tests whether a specified file exists.
System.SysUtils.FileGetAttr	Returns the file attributes of FileName.
System.SysUtils.FileGetDate	Returns an OS timestamp for a specified file.
System.SysUtils.FileIsReadOnly	Reports whether a file is read-only.
System.FileMode	Indicates the access mode on typed and untyped files opened by the System.Reset procedure.
System.SysUtils.FileOpen	Opens a specified file using a specified access mode.
System.FilePos	Returns the current file position.
System.SysUtils.FileRead	Reads a specified number of bytes from a file.
System.SysUtils.FileSearch	Searches a specified directory path for a file.
System.SysUtils.FileSeek	Repositions the read/write point.
System.SysUtils.FileSetAttr	Sets the file attributes of a specified file.
System.SysUtils.FileSetDate	Sets the OS timestamp for a specified file.
System.SysUtils.FileSetReadOnly	Sets the file permissions to read-only.
System.FileSize	Returns the number of records in a file.
System.SysUtils.FileWrite	Writes the contents of a buffer to the current position in a file.
System.Flush	Empties the buffer of a text file opened for output.
System.IOResult	Returns the status of the last I/O operation performed.
System.Input	Specifies a read-only text file associated with the processes standard Input file.
System.Output	Specifies a write-only text file associated with the process's standard output file.
System.Read	Reads data from a file.
System.Readln	Reads a line of text from a file.
System.Rename	Changes the name of an external file.
System.SysUtils.RenameFile	Changes a file name.
System.Reset	Opens an existing file.
System.Rewrite	Creates a new file and opens it.
System.Seek	Moves the current position of a file to a specified component.
System.SeekEof	Returns the end-of-file status of a file, ignoring whitespace.
System.SeekEoln	Returns the end-of-line status of a file, ignoring whitespace.
System.SetTextBuf	Assigns an I/O buffer to a text file.
System.Truncate	Deletes all the records after the current file position.
System.Write	Writes to either a typed file or a text file.
System.WriteLn	Writes to a text file and adds an end-of-line marker.

See Also

• System.Classes.TStreamWriter
• System.Classes.TStreamReader
• System.Classes.TTextWriter
• System.Classes.TTextReader