Folder changes monitor made in Visual Basic 2010 does not write changes correctly

Question

I\'ve made a program in Visual Basic 2010, that monitors and write down changes in a folder eg. when a file deletes, when a file renames, when a file creates and which files

Answer 1

When you open your streamwriter, you are not telling it to append, so it overwrites:

Dim writer As New IO.StreamWriter("log.txt", True)

Also, you dont need a new stream for each activity:

Dim msg as string= Environment.NewLine & "File " & e.FullPath & " "
Select case e.ChangeType
      case IO.WatcherChangeTypes.Created 
         msg &= "has been created"

      case IO.WatcherChangeTypes.Deleted
         msg &= "has been deleted"
      ...etc
 End Select

 Dim writer As New IO.StreamWriter("log.txt", True)
 writer.WriteLine(msg)
 writer.Close()

..you could also leave the stream open until the watcher ends

You probably should exempt logging changes to log.txt, so test e.FullPath:

 If System.Io.Path.GetFileName(e.FullPath).ToLower = "log.text" Then Exit Sub