This tutorial will teach you how to create a program that will use the File Watcher component allowing files or disallow creating files or folder in vb.net.

Now, let's start this tutorial!

1. Let's start with creating a Windows Form Application for this tutorial by following the following steps in Microsoft Visual Studio: Go to File, click New Project, and choose Windows Application.

2. Next, add FileSystemWatcher in the form. Insert one textbox named TextBox1 to display the filename, a button named ButtonBrowse2 for browsing the files, button named ButtonAllow, and a button named Buttondontallow. You must design your interface like this:



3. Now, lets do the coding.

We will first code for our FileWatcher that will have the created as an event for this component.

1. Private
   
   Sub
   
   FileSystemWatcher1_Created(
   
   ByVal
   
   sender As
   
   System.
   
   Object
   
   , ByVal
   
   e As
   
   System.
   
   IO
   
   .
   
   FileSystemEventArgs
   
   )
   
   Handles
   
   FileSystemWatcher1.
   
   Created
   
2. 
   
3. If
   
   e.
   
   Name
   
   .
   
   Contains
   
   (
   
   "\"
   
   )
   
   =
   
   False
   
   And
   
   New
   
   FileInfo(
   
   e.
   
   FullPath
   
   )
   
   .
   
   Extension
   
   =
   
   Nothing
   
   Then
   
4. 
   
5. Directory.
   
   Delete
   
   (
   
   e.
   
   FullPath
   
   )
   
6. Else
   
7. 
   
8. File.
   
   Delete
   
   (
   
   e.
   
   FullPath
   
   )
   
9. End
   
   If
   
10. 
    
11. End
    
    Sub
    

For locating or browsing files and folders, put this code in your browse button.

1. Dim
   
   fbd As
   
   New
   
   FolderBrowserDialog
   
2. 
   
3. Private
   
   Sub
   
   ButtonBrowse2_Click(
   
   ByVal
   
   sender As
   
   System.
   
   Object
   
   , ByVal
   
   e As
   
   System.
   
   EventArgs
   
   )
   
   Handles
   
   ButtonBrowse2.
   
   Click
   
4. If
   
   fbd.
   
   ShowDialog
   
   (
   
   )
   
   =
   
   Windows.
   
   Forms
   
   .
   
   DialogResult
   
   .
   
   OK
   
   Then
   
5. TextBox1.
   
   Text
   
   =
   
   fbd.
   
   SelectedPath
   
6. End
   
   If
   
7. End
   
   Sub
   

For allowing files or folders to be created, put this code for your allowed button. We will just use EnableRaisingEvents method of the FileWatcher to False.

1. Private
   
   Sub
   
   ButtonAllow_Click(
   
   ByVal
   
   sender As
   
   System.
   
   Object
   
   , ByVal
   
   e As
   
   System.
   
   EventArgs
   
   )
   
   Handles
   
   ButtonAllow.
   
   Click
   
2. FileSystemWatcher1.
   
   EnableRaisingEvents
   
   =
   
   False
   
3. 
   
4. End
   
   Sub
   

And lastly, for disallowing files and folders to be created put this code in your disallowed button.

1. Private
   
   Sub
   
   Buttondontallow_Click(
   
   ByVal
   
   sender As
   
   System.
   
   Object
   
   , ByVal
   
   e As
   
   System.
   
   EventArgs
   
   )
   
   Handles
   
   Buttondontallow.
   
   Click
   
2. 
   
3. If
   
   Not
   
   TextBox1.
   
   Text
   
   =
   
   Nothing
   
   Then
   
4. FileSystemWatcher1.
   
   Path
   
   =
   
   TextBox1.
   
   Text
   
5. FileSystemWatcher1.
   
   EnableRaisingEvents
   
   =
   
   True
   
6. FileSystemWatcher1.
   
   IncludeSubdirectories
   
   =
   
   True
   
7. Else
   
8. MessageBox.
   
   Show
   
   (
   
   "Please enter the path, you wish to monitor"
   
   )
   
9. End
   
   If
   
10. End
    
    Sub
    

For more inquiries and need programmer for your thesis systems in any kind of programming languages, just contact my number below.

Best Regards,

Engr. Lyndon Bermoy
IT Instructor/System Developer/Android Developer/Freelance Programmer
Mobile: 09488225971
Landline: 826-9296
E-mail:[email protected]

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