Files and Folders in VB.Net2008

kumar.selva.c · August 26th, 2010, 07:15 AM

Hi,

I'm new to VB.Net, i have a situation like,you have folder name "Arrange", inside this, it contains so many "txt" and "zip" files, you can rearrange it by right clicking and select "Arrange By , Last modified", i have to access this option through code and have to do this every time while i'm looping or entry of the function.

I can do this in program through forEach loop and get details like filename and creationDate, but i want to arrange it in "Arrange" Folder.

Please help me out.

Thanks in Advance:-)

Imar · August 27th, 2010, 07:02 AM

Hi there,

You can use a combination of DirectoryInfo and LINQ to get files from the file system and group them by something, such as a file extension. Here's a quick example that lists all files in a folder, each file grouped under an Extension header:

Code:

 
Dim folder As String = "C:\SomePath"
Dim directoryInfo As New IO.DirectoryInfo(folder)
 
Dim allFiles = From f In directoryInfo.GetFiles() _
      Group f By Extension = f.Extension Into Group _
      Select Extension = Extension, Files = Group
 
For Each fileGroup In allFiles
  ' Write out the extension for the group
  Console.WriteLine(fileGroup.Extension)
  For Each file In fileGroup.Files
    ' Write out each individual file name in the group
    Console.WriteLine("  " & file.Name)
  Next
Next

For more information about this, check out the System.IO namespace and the 101 LINQ examples: http://msdn.microsoft.com/en-us/vbasic/bb688088.aspx

You can do similar stuff for other groups, like date created, first letter of the filename and so on.

Cheers,

Imar

Imar · August 27th, 2010, 07:04 AM

BTW, the output of this code will be something like this:

Code:

 
.docx
  SomeFile1.docx
  SomeFile2.docx
.txt
  SomeFile1.txt
  SomeFile2.txt
  SomeFile3.txt
.zip
  SomeFile1.zip
  SomeFile2.zip

kumar.selva.c · August 28th, 2010, 02:49 AM

Hi Imar,

Thanks for your kind reply, and mine is little bit different situation,

see, jus create a folder named "Arrange" or wat eve u like, and put some "txt" and "zip" files with different creation time of each file.

Do right click and select arrange by lastmodified, so that all files will be arranged by creation date and Time. This is the folder option.

I want to access this option through coding, so that i can aovid so many lines of coding.

could u plz help me out this?

Thanks in advance.

Regards,
Selva

Imar · August 28th, 2010, 04:01 AM

Hi there,

I am not sure what you're asking. This is a Windows UI feature, so how would you access this through code? If this is about a UI and selecting files, you can use an OpenFileDialog which supports this by default.

Otherwise, I think you need to code it yourself.

Cheers,

Imar

kumar.selva.c · September 1st, 2010, 06:14 AM

Thanks Imar

blogradio · September 26th, 2011, 12:58 PM

List Files in a Directory
A little code snippet that lists files in a directory.

Quote:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
' make a reference to a directory
Dim di As New IO.DirectoryInfo("c:\")
Dim diar1 As IO.FileInfo() = di.GetFiles()
Dim dra As IO.FileInfo

'list the names of all files in the specified directory
For Each dra In diar1
ListBox1.Items.Add(dra)
Next
End Sub

To filter search change di.GetFiles() to di.GetFiles(â.extionsionâ)