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Imports System.IO
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Imports System.Windows.Forms
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' Folder Select
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' An VB.NET RC1 Windows Application converted from
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' An C#.NET beta 2 example on how to build a folder browser dialog window
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' The Code Project - Folder Select Dialog By Chris Warner
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' http://www.codeproject.com/csharp/folderseldlg.asp
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'
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' Created & improved by Goh Mingkun
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' mangokun@hotmail.com
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' Saturday, February 02, 2002
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'
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' Add this Windows Form(folderSelect.vb) and
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' its Resource file(folderSelect.resx) to your project,
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' then follow the method below to use it.
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'
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' <Usage>
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'
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' Dim dlg As FolderSelect = New FolderSelect()
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'
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' ' Directory Tree display options
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' dlg.InitialDirectory = "C:\Program Files" ' set the initial directory to be selected
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' dlg.InitialDirectoryExpanded = True ' expand the selected directory
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' dlg.ShowHiddenDirectory = True ' display hidden directories
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' dlg.ShowSystemDirectory = True ' display system directories
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'
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' If dlg.ShowDialog() = DialogResult.OK Then
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' txtSelectedFolder.Text = dlg.fullPath ' retrieve the selected folder
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'
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' Dim info As DirectoryInfo = dlg.info ' retrieve the selected folder's info
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' ' extract the directory info.
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' Dim strArray(4) As String
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'
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' strArray(0) = "Folder Name : " + dlg.foldername
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' strArray(1) = "Full Path : " + info.FullName
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' strArray(2) = "Creation Time : " + info.CreationTime.ToString()
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' strArray(3) = "Last Access Time : " + info.LastAccessTime.ToString()
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' strArray(4) = "Last Write Time : " + info.LastWriteTime.ToString()
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'
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' txtInfo.Lines = strArray
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' End If
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'
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' </Usage>
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Public Class FolderSelect
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Inherits System.Windows.Forms.Form
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Private driveLetters As String = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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Private folder As DirectoryInfo
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Private SelectedNodeAlreadyExpanded As Boolean
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Private SelectedNodeAlreadyCollapsed As Boolean
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' This method is used to initially fill the treeView control with a list
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' of available drives from which you can search for the desired folder.
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Private Sub fillTree()
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Dim directory As DirectoryInfo
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Dim sCurPath As String = ""
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' clear out the old values
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TreeView1.Nodes.Clear()
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Dim c As Char
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' loop through the drive letters and find the available drives.
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For Each c In driveLetters
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sCurPath = c + ":\"
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Try
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' get the directory informaiton for this path.
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directory = New DirectoryInfo(sCurPath)
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' if the retrieved directory information points to a valid
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' directory or drive in this case, add it to the root of the
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' treeView.
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If directory.Exists Then
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'MsgBox(sCurPath & " directory.Exists")
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Dim newNode As TreeNode = New TreeNode(directory.FullName)
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TreeView1.Nodes.Add(newNode) ' add the new node to the root level.
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' NEW TEEEEEEST
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If sInitialDirectory = sCurPath Then
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' NEW TEEEEEEST
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getSubDirs(newNode) ' scan for any sub folders on this drive.
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' NEW TEEEEEEST
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End If
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' NEW TEEEEEEST
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End If
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Catch doh As Exception
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Console.WriteLine(doh.Message)
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End Try
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Next
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End Sub
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' method getSubDirs
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' this function will scan the specified parent for any subfolders
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' if they exist. To minimize the memory usage, we only scan a single
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' folder level down from the existing, and only if it is needed.
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' the parent folder in which to search for sub-folders.
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Private Sub getSubDirs(ByVal parent As TreeNode)
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Dim directory As DirectoryInfo
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Try
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' if we have not scanned this folder before
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If parent.Nodes.Count = 0 Then
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directory = New DirectoryInfo(parent.FullPath)
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Dim dir As DirectoryInfo
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Dim IsHidden, IsSystem As Boolean
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Dim Skip As Boolean
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For Each dir In directory.GetDirectories()
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' Determine whether to show directory
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IsHidden = False
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IsSystem = False
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Skip = False
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'MsgBox(dir.FullName)
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If (GetAttr(dir.FullName) And FileAttribute.Hidden) = FileAttributes.Hidden Then
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'MsgBox(dir.FullName & " is a hidden directory")
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IsHidden = True
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Skip = True
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End If
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If (GetAttr(dir.FullName) And FileAttribute.System) = FileAttributes.System Then
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'MsgBox(dir.FullName & " is a system directory")
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IsSystem = True
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Skip = True
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End If
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If IsHidden And bShowHiddenDirectory Then
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Skip = False
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End If
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If IsSystem And bShowSystemDirectory Then
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Skip = False
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End If
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If Not Skip Then
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Dim newNode As TreeNode = New TreeNode(dir.Name)
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parent.Nodes.Add(newNode)
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End If
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Next
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End If
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' now that we have the children of the parent, see if they
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' have any child members that need to be scanned. Scanning
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' the first level of sub folders insures that you properly
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' see the '+' or '-' expanding controls on each node that represents
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' a sub folder with it's own children.
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Dim node As TreeNode
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For Each node In parent.Nodes
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'MsgBox(node.Text & " has " & node.Nodes.Count)
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' if we have not scanned this node before.
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If node.Nodes.Count = 0 Then
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' get the folder information for the specified path.
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directory = New DirectoryInfo(node.FullPath)
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' check this folder for any possible sub-folders
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Dim dir As DirectoryInfo
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Try
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For Each dir In directory.GetDirectories()
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' make a new TreeNode and add it to the treeView.
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Dim newNode As TreeNode = New TreeNode(dir.Name)
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node.Nodes.Add(newNode)
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Next
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Catch
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End Try
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End If
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Next
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Catch doh As Exception
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Console.WriteLine(doh.Message)
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End Try
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End Sub
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' method fixPath
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' For some reason, the treeView will only work with paths constructed like the following example.
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' "c:\\Program Files\Microsoft\...". What this method does is strip the leading "\\" next to the drive
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' letter.
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' the folder that needs it's path fixed for display.
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' The correctly formatted full path to the selected folder.
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Private Function fixPath(ByVal node As TreeNode) As String
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Dim sRet As String = ""
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Try
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sRet = node.FullPath
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Dim index As Integer = sRet.IndexOf("\\")
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If index > 1 Then
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sRet = node.FullPath.Remove(index, 1)
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End If
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Catch doh As Exception
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Console.WriteLine(doh.Message)
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End Try
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Return sRet
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End Function
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#Region " Windows Form Designer generated code "
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Public Sub New()
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MyBase.New()
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'This call is required by the Windows Form Designer.
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InitializeComponent()
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'Add any initialization after the InitializeComponent() call
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' initialize the treeView
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'fillTree()
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End Sub
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'Form overrides dispose to clean up the component list.
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Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
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If disposing Then
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If Not (components Is Nothing) Then
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components.Dispose()
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End If
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End If
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MyBase.Dispose(disposing)
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End Sub
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'Required by the Windows Form Designer
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Private components As System.ComponentModel.IContainer
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'NOTE: The following procedure is required by the Windows Form Designer
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'It can be modified using the Windows Form Designer.
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'Do not modify it using the code editor.
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Friend WithEvents Panel2 As System.Windows.Forms.Panel
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Friend WithEvents Panel3 As System.Windows.Forms.Panel
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Friend WithEvents TreeView1 As System.Windows.Forms.TreeView
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Friend WithEvents ImageList1 As System.Windows.Forms.ImageList
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Friend WithEvents btnSelect As System.Windows.Forms.Button
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Friend WithEvents btnCancel As System.Windows.Forms.Button
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<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
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Me.components = New System.ComponentModel.Container()
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Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(FolderSelect))
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Me.Panel2 = New System.Windows.Forms.Panel()
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Me.btnSelect = New System.Windows.Forms.Button()
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Me.btnCancel = New System.Windows.Forms.Button()
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Me.Panel3 = New System.Windows.Forms.Panel()
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Me.TreeView1 = New System.Windows.Forms.TreeView()
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Me.ImageList1 = New System.Windows.Forms.ImageList(Me.components)
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Me.Panel2.SuspendLayout()
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Me.Panel3.SuspendLayout()
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Me.SuspendLayout()
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'
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'Panel2
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'
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Me.Panel2.AutoScroll = True
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Me.Panel2.Controls.AddRange(New System.Windows.Forms.Control() {Me.btnSelect, Me.btnCancel})
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Me.Panel2.Dock = System.Windows.Forms.DockStyle.Bottom
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Me.Panel2.DockPadding.All = 10
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Me.Panel2.Location = New System.Drawing.Point(6, 222)
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Me.Panel2.Name = "Panel2"
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Me.Panel2.Size = New System.Drawing.Size(280, 45)
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Me.Panel2.TabIndex = 1
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'
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'btnSelect
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'
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Me.btnSelect.DialogResult = System.Windows.Forms.DialogResult.OK
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Me.btnSelect.Dock = System.Windows.Forms.DockStyle.Left
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Me.btnSelect.Location = New System.Drawing.Point(10, 10)
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Me.btnSelect.Name = "btnSelect"
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Me.btnSelect.Size = New System.Drawing.Size(75, 25)
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Me.btnSelect.TabIndex = 1
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Me.btnSelect.Text = "&OK"
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'
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'btnCancel
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'
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Me.btnCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel
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Me.btnCancel.Dock = System.Windows.Forms.DockStyle.Right
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Me.btnCancel.Location = New System.Drawing.Point(198, 10)
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Me.btnCancel.Name = "btnCancel"
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Me.btnCancel.Size = New System.Drawing.Size(72, 25)
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Me.btnCancel.TabIndex = 2
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Me.btnCancel.Text = "&Cancel"
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'
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'Panel3
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'
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Me.Panel3.Anchor = (((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
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Or System.Windows.Forms.AnchorStyles.Left) _
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Or System.Windows.Forms.AnchorStyles.Right)
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Me.Panel3.Controls.AddRange(New System.Windows.Forms.Control() {Me.TreeView1})
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Me.Panel3.DockPadding.All = 10
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Me.Panel3.Location = New System.Drawing.Point(6, 0)
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Me.Panel3.Name = "Panel3"
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Me.Panel3.Size = New System.Drawing.Size(280, 224)
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Me.Panel3.TabIndex = 5
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'
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'TreeView1
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'
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Me.TreeView1.Dock = System.Windows.Forms.DockStyle.Fill
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Me.TreeView1.ImageList = Me.ImageList1
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Me.TreeView1.ImeMode = System.Windows.Forms.ImeMode.NoControl
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Me.TreeView1.Location = New System.Drawing.Point(10, 10)
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Me.TreeView1.Name = "TreeView1"
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Me.TreeView1.Size = New System.Drawing.Size(260, 204)
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Me.TreeView1.TabIndex = 0
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'
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'ImageList1
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'
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Me.ImageList1.ColorDepth = System.Windows.Forms.ColorDepth.Depth8Bit
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Me.ImageList1.ImageSize = New System.Drawing.Size(16, 16)
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Me.ImageList1.ImageStream = CType(resources.GetObject("ImageList1.ImageStream"), System.Windows.Forms.ImageListStreamer)
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Me.ImageList1.TransparentColor = System.Drawing.Color.Transparent
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'
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'FolderSelect
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'
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Me.AcceptButton = Me.btnSelect
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Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
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Me.CancelButton = Me.btnCancel
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Me.ClientSize = New System.Drawing.Size(292, 273)
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Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Panel3, Me.Panel2})
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Me.DockPadding.All = 6
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Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
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Me.KeyPreview = True
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Me.MaximizeBox = False
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Me.MinimizeBox = False
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Me.MinimumSize = New System.Drawing.Size(230, 300)
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Me.Name = "FolderSelect"
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Me.ShowInTaskbar = False
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Me.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Show
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Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent
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Me.Text = "Verzeichnis ausw<73>hlen"
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Me.Panel2.ResumeLayout(False)
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Me.Panel3.ResumeLayout(False)
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Me.ResumeLayout(False)
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End Sub
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#End Region
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' method treeView1_BeforeSelect
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' Before we select a tree node we want to make sure that we scan the soon to be selected
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' tree node for any sub-folders. this insures proper tree construction on the fly.
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' The object that invoked this event
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' The TreeViewCancelEventArgs event arguments.
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Private Sub TreeView1_BeforeSelect(ByVal sender As System.Object, ByVal e As System.Windows.Forms.TreeViewCancelEventArgs) Handles TreeView1.BeforeSelect
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getSubDirs(e.Node) ' get the sub-folders for the selected node.
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' TextBox1.Text = fixPath(e.Node) ' update the user selection text box.
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folder = New DirectoryInfo(e.Node.FullPath) ' get it's Directory info.
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' change the image of the selected node to a selected folder icon
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If e.Node.IsExpanded Then
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e.Node.ImageIndex = 1
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e.Node.SelectedImageIndex = 3
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Else
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e.Node.ImageIndex = 0
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e.Node.SelectedImageIndex = 2
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End If
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End Sub
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' method treeView1_BeforeExpand
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' Before we expand a tree node we want to make sure that we scan the soon to be expanded
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' tree node for any sub-folders. this insures proper tree construction on the fly.
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' The object that invoked this event
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' The TreeViewCancelEventArgs event arguments.
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Private Sub TreeView1_BeforeExpand(ByVal sender As System.Object, ByVal e As System.Windows.Forms.TreeViewCancelEventArgs) Handles TreeView1.BeforeExpand
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If e.Node Is TreeView1.SelectedNode Then
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If SelectedNodeAlreadyCollapsed Then
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e.Cancel = True
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Exit Sub
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End If
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End If
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getSubDirs(e.Node) ' get the sub-folders for the selected node.
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'TextBox1.Text = fixPath(e.Node) ' update the user selection text box.
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'folder = New DirectoryInfo(e.Node.FullPath) ' get it's Directory info.
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' change the image of the expanded node to an opened folder icon
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e.Node.ImageIndex = 1
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e.Node.SelectedImageIndex = 3
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End Sub
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Private Sub TreeView1_BeforeCollapse(ByVal sender As System.Object, ByVal e As System.Windows.Forms.TreeViewCancelEventArgs) Handles TreeView1.BeforeCollapse
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If e.Node Is TreeView1.SelectedNode Then
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If SelectedNodeAlreadyExpanded Then
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e.Cancel = True
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Exit Sub
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End If
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End If
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' change the image of the collapsed node back to a closed folder icon
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e.Node.ImageIndex = 0
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e.Node.SelectedImageIndex = 2
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End Sub
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' method cancelBtn_Click
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' This method cancels the folder browsing.
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Private Sub btnCancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCancel.Click
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folder = Nothing
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Me.Close()
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End Sub
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' method selectBtn_Click
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' This method accepts which ever folder is selected and closes this application
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' with a DialogResult.OK result if you invoke this form though Form.ShowDialog().
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Private Sub btnSelect_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSelect.Click
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Me.Close()
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End Sub
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Private Sub FolderSelect_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
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Try
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' initialize the treeView
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fillTree()
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Me.Activate()
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TreeView1.Select()
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If sInitialDirectory <> "" Then
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TreeView1.SelectedNode = GetInitialNode()
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End If
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If bInitialDirectoryExpanded Then
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TreeView1.SelectedNode.Expand()
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End If
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Catch doh As Exception
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Console.WriteLine(doh.Message)
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End Try
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End Sub
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Private Function GetInitialNode() As TreeNode
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Dim path As String = sInitialDirectory
|
|
|
If Not path.EndsWith("\") Then
|
|
|
path += "\"
|
|
|
End If
|
|
|
Dim node, subnode As TreeNode
|
|
|
Dim index As Integer
|
|
|
Dim label As String
|
|
|
' Get the drive
|
|
|
index = path.IndexOf("\")
|
|
|
label = path.Substring(0, index + 1)
|
|
|
' Search the nodes for the drive
|
|
|
For Each node In TreeView1.Nodes
|
|
|
If node.Text.ToLower = label.ToLower Then
|
|
|
|
|
|
path = path.Remove(0, index + 1)
|
|
|
Do While path <> ""
|
|
|
node.Expand()
|
|
|
'MsgBox(path)
|
|
|
index = path.IndexOf("\")
|
|
|
label = path.Substring(0, index)
|
|
|
'MsgBox(label)
|
|
|
|
|
|
' Search the nodes for the sub-directory
|
|
|
For Each subnode In node.Nodes
|
|
|
If subnode.Text.ToLower = label.ToLower Then
|
|
|
node = subnode
|
|
|
Exit For
|
|
|
End If
|
|
|
Next
|
|
|
|
|
|
path = path.Remove(0, index + 1)
|
|
|
Loop
|
|
|
Exit For
|
|
|
End If
|
|
|
Next
|
|
|
|
|
|
Return node
|
|
|
End Function
|
|
|
|
|
|
' handle key events
|
|
|
Private Sub FolderSelect_KeyDown(ByVal sender As System.Object, ByVal e As KeyEventArgs) Handles MyBase.KeyDown
|
|
|
'MsgBox(e.KeyCode)
|
|
|
Select Case e.KeyCode
|
|
|
Case Keys.Add
|
|
|
'MsgBox("Add")
|
|
|
SelectedNodeAlreadyExpanded = TreeView1.SelectedNode.IsExpanded
|
|
|
SelectedNodeAlreadyCollapsed = False
|
|
|
Case Keys.KeyCode.Subtract
|
|
|
'MsgBox("Subtract")
|
|
|
SelectedNodeAlreadyExpanded = False
|
|
|
SelectedNodeAlreadyCollapsed = Not TreeView1.SelectedNode.IsExpanded
|
|
|
Case Keys.Left
|
|
|
SelectedNodeAlreadyExpanded = False
|
|
|
End Select
|
|
|
End Sub
|
|
|
|
|
|
' method foldername
|
|
|
' A method to retrieve the name for the selected folder,
|
|
|
' without the full path.
|
|
|
' This method will return empty string
|
|
|
' when root of drive is selected
|
|
|
Public ReadOnly Property foldername() As String
|
|
|
Get
|
|
|
If Not IsNothing(folder) And folder.Exists Then
|
|
|
Dim FullPath As String = fixPath(TreeView1.SelectedNode)
|
|
|
Dim index As Integer = FullPath.LastIndexOf("\")
|
|
|
Return FullPath.Substring(index + 1)
|
|
|
Else
|
|
|
Return Nothing
|
|
|
End If
|
|
|
End Get
|
|
|
End Property
|
|
|
|
|
|
' method fullPath
|
|
|
' Retrieve the full path for the selected folder.
|
|
|
' The correctly formatted full path to the selected folder.
|
|
|
Public ReadOnly Property fullPath() As String
|
|
|
Get
|
|
|
If Not IsNothing(folder) And folder.Exists And Not IsNothing(TreeView1.SelectedNode) Then
|
|
|
Return fixPath(TreeView1.SelectedNode)
|
|
|
Else
|
|
|
Return Nothing
|
|
|
End If
|
|
|
End Get
|
|
|
End Property
|
|
|
|
|
|
' method info
|
|
|
' Retrieve the full DirectoryInfo object associated with the selected folder.
|
|
|
' Note that this will not have the corrected full path string.
|
|
|
' The full DirectoryInfo object associated with the selected folder.
|
|
|
Public ReadOnly Property info() As DirectoryInfo
|
|
|
Get
|
|
|
If Not IsNothing(folder) And folder.Exists Then
|
|
|
Return folder
|
|
|
Else
|
|
|
Return Nothing
|
|
|
End If
|
|
|
End Get
|
|
|
End Property
|
|
|
|
|
|
' Property InitialDirectory
|
|
|
' Set InitialDirectory to be selected and visible
|
|
|
Private sInitialDirectory As String
|
|
|
Public Property InitialDirectory() As String
|
|
|
Get
|
|
|
Return sInitialDirectory
|
|
|
End Get
|
|
|
Set(ByVal Value As String)
|
|
|
If Directory.Exists(Value) Then
|
|
|
sInitialDirectory = Value.Trim
|
|
|
End If
|
|
|
End Set
|
|
|
End Property
|
|
|
|
|
|
' Property InitialDirectory
|
|
|
' Determine whether InitialDirectory is to be expanded when displayed
|
|
|
Private bInitialDirectoryExpanded As Boolean
|
|
|
Public Property InitialDirectoryExpanded() As Boolean
|
|
|
Get
|
|
|
Return bInitialDirectoryExpanded
|
|
|
End Get
|
|
|
Set(ByVal Value As Boolean)
|
|
|
bInitialDirectoryExpanded = Value
|
|
|
End Set
|
|
|
End Property
|
|
|
|
|
|
' Property ShowHiddenDirectory
|
|
|
' Determine whether hidden directories are displayed
|
|
|
Private bShowHiddenDirectory As Boolean
|
|
|
Public Property ShowHiddenDirectory() As Boolean
|
|
|
Get
|
|
|
Return bShowHiddenDirectory
|
|
|
End Get
|
|
|
Set(ByVal Value As Boolean)
|
|
|
bShowHiddenDirectory = Value
|
|
|
End Set
|
|
|
End Property
|
|
|
|
|
|
' Property ShowSystemDirectory
|
|
|
' Determine whether system directories are displayed
|
|
|
Private bShowSystemDirectory As Boolean
|
|
|
Public Property ShowSystemDirectory() As Boolean
|
|
|
Get
|
|
|
Return bShowSystemDirectory
|
|
|
End Get
|
|
|
Set(ByVal Value As Boolean)
|
|
|
bShowSystemDirectory = Value
|
|
|
End Set
|
|
|
End Property
|
|
|
End Class
|
