Today I will introduce some tips about File object in Small Basic.
File.LastError
Have you ever used File.LastError? Following program is a sample using File.LastError. File.LastError property contains file error message from Windows system. Following is a sample code.
GetPath()While path <> "" TextWindow.WriteLine("[" + path + "]") files = File.GetFiles(path) If files = "FAILED" Then TextWindow.WriteLine("File.GetFiles: FAILED") TextWindow.WriteLine("File.LastError: " + File.LastError) TextWindow.WriteLine("") Else n = Array.GetItemCount(files) For i = 1 To n TextWindow.WriteLine(files[i]) EndFor TextWindow.WriteLine("") EndIf GetPath()EndWhileSub GetPath ' return path TextWindow.Write("Path? ") path = TextWindow.Read()EndSubFollowing list is a sample output of this program. File.LastError message is written in local language of your system.
Path? notexist [notexist] File.GetFiles: FAILED File.LastError: Directory Path does not exist. Path?
Dot in Path
Path names given in File operations should be full path names. But "." and ".." are allowed as full path names. "." means a current directory. ".." means a parent directory.
Path? ..\.. [..\..] ..\..\bootmgr ..\..\BOOTNXT ..\..\pagefile.sys ..\..\swapfile.sys Path?
Slash in Path
A path name may contain back slash "\". But slash "/" also can be used instead of back slash.
Path? /Program Files (x86)/Microsoft/Small Basic/lib [/Program Files (x86)/Microsoft/Small Basic/lib] /Program Files (x86)/Microsoft/Small Basic/lib\LitDev.De.xml /Program Files (x86)/Microsoft/Small Basic/lib\LitDev.dll /Program Files (x86)/Microsoft/Small Basic/lib\LitDev.xml /Program Files (x86)/Microsoft/Small Basic/lib\Microsoft.Kinect.dll /Program Files (x86)/Microsoft/Small Basic/lib\Microsoft.Kinect.Face.dll /Program Files (x86)/Microsoft/Small Basic/lib\Microsoft.Kinect.SmallBasic.dll /Program Files (x86)/Microsoft/Small Basic/lib\Microsoft.Kinect.SmallBasic.XML /Program Files (x86)/Microsoft/Small Basic/lib\Microsoft.Kinect.Wpf.Controls.dll Path?