file.operations

=Copying, Moving, Deleting and Renaming Files=
[[user:alexbarfoot]]
[[toc]]

==Copying a file==
**Below the method by which a file can be copied using API calls is shown:**
[[code format="vbnet"]]
calldll #kernel132, "CopyFileA",_
currentfilename$ as ptr,_ 'the string containing the file to be copied
copyfilename$ as ptr,_ 'the string containing the file name of the copied file
bFailIfExists as boolean,_ '1 or 0
re as boolean'not 0 if copy was successful
[[code]]
The currentfilename$ is the string that contains the name of the file you want to make a copy of. The copyfilename$ is the file name for the copy. The bFailIfExists tells the computer what to do if the file name for the copy is already used. If set to 0 the copy will overwrite the current file with the same name. If set to 1 the copy does not overwrite the file. The code below shows how to copy a file into a different folder with the same file name:
[[code format="vbnet"]]
let currentfilename$= "c:\text.txt"
let copyfilename$= "c:\folder\text.txt"
let bFailIfExists= 0
calldll #kernel132, "CopyFileA",_
currentfilename$ as ptr,_
copyfilename$ as ptr,_
bFailIfExists as boolean,_ '1 or 0
re as boolean
if re=0 then print "copyfailed"
[[code]]
The code below shows how to make a copy of a file into the same folder with a different filename:

[[code format="vbnet"]]
let currentfilename$= "c:\text.txt"
let copyfilename$= "c:\copyoftext.txt"
let bFailIfExists= 0
calldll #kernel132, "CopyFileA",_
currentfilename$ as ptr,_
copyfilename$ as ptr,_
bFailIfExists as boolean,_
re as boolean
if re=0 then print "copyfailed"
[[code]]

Remember to include the complete path in the filename.

==Moving a file==
**There are two ways to move a file; using the name command and using API calls.**
Below the method by which a file can be moved using API calls is shown:
[[code format="vbnet"]]
calldll #kernel132, "MoveFileA",_
currentfilename$ as ptr,_ 'the string containing the file to be copied
movefilename$ as ptr,_ 'the string containing the file name of the file in its new location
re as boolean 'not 0 if move was successful

[[code]]
The currentfilename$ is the string that contains the name of the file you want to move. The movefilename$ is the file name for the new location of the file. If the function succeeds, the return value is nonzero. If the function fails, the return value is zero.Points to a null-terminated string that specifies the new name of a file or directory. The new name must not already exist. A new file may be on a different file system or drive. The code below shows how to move a file and keep the same file name.
[[code format="vbnet"]]
let currentfilename$= "c:\text.txt"
let movefilename$= "c:\folder\text.txt"
calldll #kernel132, "MoveFileA",_
currentfilename$ as ptr,_
movefilename$ as ptr,_
re as boolean
if re=0 then print "move failed"
[[code]]

The code below shows how to move a file with a different file name:
[[code format="vbnet"]]
let currentfilename$= "c:\text.txt"
let movefilename$= "c:\folder\textmoved.txt"
calldll #kernel132, "MoveFileA",_
currentfilename$ as ptr,_
movefilename$ as ptr,_
re as boolean
if re=0 then print, "move failed"
[[code]]

Below the method by which a file can be moved using the name comand is shown:
[[code]]
name filename$ as movefilename$
[[code]]

You must set the filename$ string to the current name of the file you want to move. Remember to include the full path. Then you need to set the movefilename$ to the path to which you want to move it, plus the filename. movefilename$ can be any valid filename as long as it doesn't specify a file that already exists.

A working example is shown below:
[[code format="vbnet"]]
let currentfilename$= "c:\text.txt"
let movefilename$= "c:\folder\text.txt"
name filename$ as movefilename$
[[code]]

==Deleting a file==
Files can be deleted using the kill command. The kill comand does not place the file in the recycle bin. The code below shows how the kill command works.
[[code format="vbnet"]]
filedialog "select file a file to delete", "*.*", filename$
if filename$="" then wait
kill filename$
[[code]]

Use the code above wisely and don't just delete any odd file because it is hard to get it back.

==Renaming a file==
**You can use the name command to rename a file.** This command can also be used to move a file. See the move section above to learn how that works. The code below shows how to rename a file:
[[code format="vbnet"]]
filedialog "select file a file to rename", "*.*", filename$
if filename$="" then wait
prompt "enter a new file name"; newfilename$
name filename$ as newfilename$
print "Filename has been changed from";filename$;"to";newfilename$
[[code]]
Remember to include file extensions such as .txt on the end of the new file name.

Article by Alex Barfoot
alexbarfoot at gmail.com
[[user:alexbarfoot]]
[[toc]]