Using a TreeView to display the directory structure : TreeView « GUI « VB.Net





Using a TreeView to display the directory structure

Using a TreeView to display the directory structure
 
Imports System
Imports System.Drawing
Imports System.Windows.Forms
Imports System.IO

Public Class MainClass

   Shared Sub Main()
        Dim myform As Form = New FrmTreeViewDirectory()
        Application.Run(myform)

   End Sub ' Main

End Class


Public Class FrmTreeViewDirectory
   Inherits Form

#Region " Windows Form Designer generated code "

   Public Sub New()
      MyBase.New()

      'This call is required by the Windows Form Designer.
      InitializeComponent()

      'Add any initialization after the InitializeComponent() 
      'call

   End Sub

   'Form overrides dispose to clean up the component list.
   Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
      If Disposing Then
         If Not (components Is Nothing) Then
            components.Dispose()
         End If
      End If
      MyBase.Dispose(Disposing)
   End Sub

   ' contains view of c: drive directory structure
   Friend WithEvents treDirectory As System.Windows.Forms.TreeView

   'Required by the Windows Form Designer
   Private components As System.ComponentModel.Container

   'NOTE: The following procedure is required by the Windows Form Designer
   'It can be modified using the Windows Form Designer.  
   'Do not modify it using the code editor.
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
      Me.treDirectory = New System.Windows.Forms.TreeView()
      Me.SuspendLayout()
      '
      'treDirectory
      '
      Me.treDirectory.Dock = System.Windows.Forms.DockStyle.Fill
      Me.treDirectory.ImageIndex = -1
      Me.treDirectory.Name = "treDirectory"
      Me.treDirectory.SelectedImageIndex = -1
      Me.treDirectory.Size = New System.Drawing.Size(296, 293)
      Me.treDirectory.TabIndex = 0
      '
      'FrmTreeViewDirectory
      '
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.ClientSize = New System.Drawing.Size(296, 293)
      Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.treDirectory})
      Me.Name = "FrmTreeViewDirectory"
      Me.Text = "TreeViewDirectoryStructure"
      Me.ResumeLayout(False)

   End Sub

#End Region

   Public Sub PopulateTreeView(ByVal directoryValue As String, _
      ByVal parentNode As TreeNode)
      Try

         Dim directoryArray As String() = Directory.GetDirectories(directoryValue)

         If directoryArray.Length <> 0 Then 
            Dim currentDirectory As String

            For Each currentDirectory In directoryArray
               Dim myNode As TreeNode = New TreeNode(currentDirectory)
               parentNode.Nodes.Add(myNode)
'               PopulateTreeView(currentDirectory, myNode)
            Next

         End If

      Catch unauthorized As UnauthorizedAccessException
         parentNode.Nodes.Add("Access Denied")
      End Try

   End Sub

   Private Sub FrmTreeViewDirectory_Load(ByVal sender As Object, _
      ByVal e As System.EventArgs) Handles MyBase.Load

      treDirectory.Nodes.Add("C:")
      PopulateTreeView("C:\", treDirectory.Nodes(0))
   End Sub

End Class
           
         
  










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