I'm using Visual Studio .Net 2008 on Vista. The goal of my program is to watch a directory, get file information, then sort them by their date, and produce a updated text file. I can't seem to get my code to generate a list of files sorted by date. The code does produce a general list of files, however presently ordered in the directory. I also tried an alternate way of sorting the files by date by creating a string, removing the date using substring, then comparing the file dates using datetime.parse but it produces a exception error. The first method using the structure follows:
The code doesn't generate an error, and I don't know why it's not working. Any clues? Anyone, please help.Code:Public Class Form1
Private Const outputloc As String = "C:\tickercontent.txt"
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim dname As String = "M:\"
ShowFiles(dname, outputloc)
' Get the Path to watch
FileSystemWatcher1.Path = dname
FileSystemWatcher1.IncludeSubdirectories = False
FileSystemWatcher1.Filter = "*.*"
' Make the FileSystemWatcher.
FileSystemWatcher1.NotifyFilter = 0
FileSystemWatcher1.NotifyFilter = FileSystemWatcher1.NotifyFilter Or NotifyFilters.FileName
FileSystemWatcher1.EnableRaisingEvents = True
End Sub
' Create the structure for the file array
Structure FilesStruct
' Dim startHTML As String
Dim Text As String
Dim fsize As String
Dim Creation As String
'Dim endHTML As String
End Structure
Private Sub WatcherHandler(ByVal sender As System.Object, ByVal e As System.EventArgs) _
Handles FileSystemWatcher1.Created, FileSystemWatcher1.Changed
ShowFiles(FileSystemWatcher1.Path, outputloc)
End Sub
' Sort the files by date in the text file
Sub SortFiles(ByVal FileList As Array)
End Sub
Sub ShowFiles(ByVal selFolder As String, ByVal outputpath As String)
Dim objWriter As New System.IO.StreamWriter(outputpath)
Dim Text As String
Dim files() As String
Dim FileList As New ArrayList
Dim file As String
Dim fsize As String
Dim totalfiles As Integer = 0
Dim sumsizefiles As Integer
Dim creation As String
Dim DirInfo As String
Dim FI As IO.FileInfo
Dim line As String
' Get the files in the selected folder/directory
files = IO.Directory.GetFiles(selFolder)
' Get sub directories subdirs now contains a list of directories under selFolder
Dim subdirs As New ArrayList
GetDirectories(selFolder, subdirs)
' Write HTML Dive message start tage
objWriter.WriteLine("<div class=""message"">")
RichTextBox1.Text = "<div class=""message"">"
' Get Directory Information
DirInfo = Path.GetDirectoryName(selFolder)
' Write the directory information to the selected output file location/objWriter
objWriter.WriteLine("Directory of " + DirInfo + "</BR>")
RichTextBox1.Text = "Directory of " + DirInfo + "</BR>"
For Each file In files
' Create new file object with FileStruct's structure
Dim newfile As New FilesStruct
' Create FileInfo object
FI = New IO.FileInfo(file)
' Get the total sum of files found during the loop
totalfiles = totalfiles + 1
' Get the file's length in byte's
fsize = FI.Length.ToString("#,###")
' Get the file's creation time
creation = FI.CreationTime
' Get the file's total size
sumsizefiles += FI.Length / 1024
' Build array with pdf file names
Text = IO.Path.GetFileName(file)
' Write to text file
RichTextBox1.Text = Text
line = Text & vbTab & fsize & vbTab & creation + "</BR>"
objWriter.WriteLine(Text & vbTab & fsize & vbTab & creation + "</BR>")
RichTextBox1.Text = Text & vbTab & fsize & vbTab & creation + "</BR>"
' Assign values to the ArrayList
newfile.Text = CStr(Text)
newfile.fsize = CStr(fsize)
newfile.Creation = CStr(creation)
' Store the collection of items in the ArrayList
FileList.Add(newfile)
Next
' Sort the array
Dim sorted As Boolean = True
Dim DateComparer As New CustomDateComparer
Try
FileList.Sort(New CustomDateComparer)
Catch SortException As InvalidOperationException
MsgBox("You can't sort an ArrayList whose items " & _
"aren't of the same type.")
Catch GeneralException As Exception
MsgBox("The following exception occured: " & _
vbCrLf & GeneralException.Message)
sorted = False
End Try
If sorted Then
' Print the ArrayList by extracting items
sumsizefiles = sumsizefiles / 1024
' Print the summary information
objWriter.WriteLine(CStr(totalfiles).ToString + " File(s) " + CStr(sumsizefiles) + " KB" + "</BR>")
RichTextBox1.Text = CStr(totalfiles).ToString + " File(s) " + CStr(sumsizefiles) + " KB" + "</BR>"
objWriter.WriteLine("Not including " + subdirs.Count.ToString + " Sub Directories" + "</BR>")
RichTextBox1.Text = "Not including " + subdirs.Count.ToString + " Sub Directories" + "</BR>"
objWriter.WriteLine("</div>")
RichTextBox1.Text = "</div>"
End If
objWriter.Close()
' Clear the ArrayList before the next execution of this program
FileList.Clear()
End Sub
Sub GetDirectories(ByVal StartPath As String, ByRef DirectoryList As ArrayList)
' Get all sub directories in the startpath/selFolder
Dim Dirs() As String = Directory.GetDirectories(StartPath)
' Add the new sub directory to the directory list
DirectoryList.AddRange(Dirs)
' Recursively, get the sub directories for each directory in the directory list
For Each Dir As String In Dirs
GetDirectories(Dir, DirectoryList)
Next
End Sub
End Class
Class CustomDateComparer : Implements IComparer
Public Function Compare(ByVal x As Object, ByVal y As Object) As Integer Implements System.Collections.IComparer.Compare
Dim file1, file2 As Form1.FilesStruct
' Try to catch errors if the objects are of differing types
Try
file1 = CType(x, Form1.FilesStruct)
file2 = CType(y, Form1.FilesStruct)
Catch CompareException As System.Exception
Throw (CompareException)
Exit Function
End Try
' Begin Comparison
If file1.Creation < file2.Creation Then
Return -1
Else
If file1.Creation > file2.Creation Then
Return 1
Else
Return 0
End If
End If
End Function
End Class
