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Browsing folder in vb.net

Posted on 2004-04-20
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Last Modified: 2010-04-24
I want to be able browse for folders in my application, not start different dialog but right on my main menu. Should i use some kind of label or something?  Can i be able to browse for folders & for files, work with folders & files without starting explorer.exe ?
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Question by:g00r00
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by:Mike Tomlinson
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Do you mean you want a menu to dynamically fill with folders and you select one?

...or...

Do you want to use a treeview (like in explorer)?

Idle_Mind
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malharone earned 20 total points
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Expert Comment

by:Mike Tomlinson
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Below is a VERY BASIC explorer like interface that I wrote.  It is not very effecient, or pretty for that manner, but it is fairly easy to understand how it works.

The project here http://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=2224&lngWId=10 is very good and worth the download.

Regards,

Idle_Mind

Imports System.IO

Public Class Form1
    Inherits System.Windows.Forms.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

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

    '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.
    Friend WithEvents directoryTree As System.Windows.Forms.TreeView
    Friend WithEvents curDir As System.Windows.Forms.Label
    Friend WithEvents filesListView As System.Windows.Forms.ListView
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.directoryTree = New System.Windows.Forms.TreeView
        Me.curDir = New System.Windows.Forms.Label
        Me.filesListView = New System.Windows.Forms.ListView
        Me.SuspendLayout()
        '
        'directoryTree
        '
        Me.directoryTree.Anchor = CType(((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
                    Or System.Windows.Forms.AnchorStyles.Left), System.Windows.Forms.AnchorStyles)
        Me.directoryTree.ImageIndex = -1
        Me.directoryTree.Location = New System.Drawing.Point(8, 32)
        Me.directoryTree.Name = "directoryTree"
        Me.directoryTree.SelectedImageIndex = -1
        Me.directoryTree.Size = New System.Drawing.Size(224, 360)
        Me.directoryTree.TabIndex = 0
        '
        'curDir
        '
        Me.curDir.Location = New System.Drawing.Point(16, 8)
        Me.curDir.Name = "curDir"
        Me.curDir.Size = New System.Drawing.Size(560, 16)
        Me.curDir.TabIndex = 1
        '
        'filesListView
        '
        Me.filesListView.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
                    Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
        Me.filesListView.Location = New System.Drawing.Point(240, 32)
        Me.filesListView.Name = "filesListView"
        Me.filesListView.Size = New System.Drawing.Size(336, 360)
        Me.filesListView.TabIndex = 2
        Me.filesListView.View = System.Windows.Forms.View.List
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(584, 398)
        Me.Controls.Add(Me.filesListView)
        Me.Controls.Add(Me.curDir)
        Me.Controls.Add(Me.directoryTree)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Me.Show()
        Cursor.Current = Cursors.WaitCursor
        Dim drives() As String = Directory.GetLogicalDrives()
        Dim drive As String
        Dim rootDrive As TreeNode
        directoryTree.BeginUpdate()
        For Each drive In drives
            rootDrive = New TreeNode(drive)
            directoryTree.Nodes.Add(rootDrive)
            getSubDirs(rootDrive, rootDrive.Text, 0)
        Next drive
        directoryTree.EndUpdate()
        Cursor.Current = Cursors.Default
    End Sub

    Private Sub getSubDirs(ByVal parentDir As TreeNode, ByVal fullPath As String, ByVal recurseLevel As Integer)
        Try
            parentDir.Nodes.Clear()
            Dim subDirs() As String = Directory.GetDirectories(fullPath, "*")
            Dim subDir As String
            Dim subDirNode As TreeNode
            Dim di As DirectoryInfo
            recurseLevel = recurseLevel + 1
            If recurseLevel <= 2 Then
                For Each subDir In subDirs
                    di = New DirectoryInfo(subDir)
                    If Not ((di.Attributes And FileAttributes.Hidden) = FileAttributes.Hidden) Then
                        subDirNode = New TreeNode(subDir.Substring(subDir.LastIndexOf("\") + 1))
                        parentDir.Nodes.Add(subDirNode)
                        getSubDirs(subDirNode, subDir & "\", recurseLevel)
                    End If
                Next subDir
            End If
        Catch ex As Exception
            Debug.WriteLine(ex.Message)
        End Try
    End Sub

    Private Sub directoryTree_BeforeExpand(ByVal sender As System.Object, ByVal e As System.Windows.Forms.TreeViewCancelEventArgs) Handles directoryTree.BeforeExpand
        Dim fp As String = getFullPath(e.Node)
        Cursor.Current = Cursors.WaitCursor
        getSubDirs(e.Node, fp, 0)
        Cursor.Current = Cursors.Default
    End Sub

    Private Function getFullPath(ByVal n As TreeNode) As String
        Dim fp As String = n.FullPath
        fp = fp.Replace("\\", "\")
        If Not fp.EndsWith("\") Then
            fp = fp & "\"
        End If
        Return fp
    End Function

    Private Sub directoryTree_AfterSelect(ByVal sender As Object, ByVal e As System.Windows.Forms.TreeViewEventArgs) Handles directoryTree.AfterSelect
        curDir.Text = getFullPath(directoryTree.SelectedNode)
        updateFolderContents(curDir.Text)
    End Sub

    Private Sub updateFolderContents(ByVal path As String)
        Try
            Dim di As New DirectoryInfo(path)
            Dim fi As FileInfo() = di.GetFiles()
            Dim fiTemp As FileInfo
            Dim fileEntry As ListViewItem

            filesListView.Items.Clear()
            For Each fiTemp In fi
                If Not ((fiTemp.Attributes And FileAttributes.Hidden) = FileAttributes.Hidden) Then
                    fileEntry = New ListViewItem(fiTemp.Name)
                    filesListView.Items.Add(fileEntry)
                End If
            Next fiTemp
        Catch ex As Exception
            Debug.WriteLine(ex.Message)
        End Try
    End Sub
End Class
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