FileCheckUsage()

Summary

Checks whether files are in use by Maptitude.

 

Syntax

result = FileCheckUsage(array file_names, string type)

 

Argument	Contents
file_names	An array of strings containing the names of files
type	The file type; if type is null all types are checked

 

Type	Description
CDF	Checks only against files that are part of a .CDFthat is open in the session, such as .CDF, .CDX, and .STY
DBD	Checks only against files that are part of a .DBDthat is open in the session, such as .DBD, .R0, .PTS, and .STY
SET	Checks only against files that could be used by a set; when sets are large, the index becomes file-based

 

In addition, any table type may be used to check against dataviews of that type. For a list of table types, see OpenTable().

 

Returns

A string containing "True" or "False" as appropriate.

 

Notes

• If type is null then FileCheckUsage() checks if the file is in use by any of the following that are open in the session:

• • DBDs (standard geographic files)

  • CDFs (compact geographic files)

  • Sets (file-based indices)

  • Dataviews

  • Temporary files

  • Images

Example

on escape do Return(false) end

    openfile:

    fname = ChooseFileName(d_exts_table, "Save Table As", {{"Replace Warning", "False"}})

    if FileCheckUsage({fname},) then do

        ShowMessage("File already in use.  Please choose again.")

        goto openfile

        end

    on escape default

 

See Also

Function	Summary
ChooseFile()	Gets the name of an existing file using the Windows File Open dialog box
GetDirectoryInfo()	Gets a listing of the contents of a directory
GetFileInfo()	Gets information about a file
SearchFilePath()	Searches for the path for a filename