知识大全 VB.NET中采用多线程填写treeview控件

Posted 2022-07-17 知

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功能把选定文件夹下的dll 子文件夹和子文件夹中的dll填写到窗体的treeview控件上　　缺点窗体简单代码有些混乱线程之间的调用可能没有到最优化　　实现 imagelist中的图片需要自己重新定义　　多线程的优点可以及时响应用户的操作不至于产生未响应的尴尬设计合理（结合需求）的话可使软件的性能提高　　多线程的编写结构合理注意同步　　以上是我对这个例程和多线程的个人体会如有不妥之处还请大家批评指正 Imports System IOPublic Class Form Inherits System Windows Forms Form#Region Windows 窗体设计器生成的代码 Public Sub New()　MyBase New()　该调用是 Windows 窗体设计器所必需的　InitializeComponent()　在 InitializeComponent() 调用之后添加任何初始化End Sub 窗体重写 dispose 以清理组件列表 Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)　If disposing Then　　If Not (ponents Is Nothing) Then　　　ponents Dispose()　　End If　End If　MyBase Dispose(disposing)End Sub Windows 窗体设计器所必需的Private ponents As System ComponentModel IContainer　注意: 以下过程是 Windows 窗体设计器所必需的　可以使用 Windows 窗体设计器修改此过程　不要使用代码编辑器修改它　Friend WithEvents TreeView As System Windows Forms TreeView　Friend WithEvents btnOpenBrower As System Windows Forms Button　Friend WithEvents ImageList As System Windows Forms ImageList　<System Diagnostics DebuggerStepThrough()> Private Sub InitializeComponent()　ponents = New System ComponentModel Container　Dim resources As System Resources ResourceManager = New System Resources ResourceManager(GetType(Form ))　Me TreeView = New System Windows Forms TreeView　Me ImageList = New System Windows Forms ImageList(ponents)　Me btnOpenBrower = New System Windows Forms Button　Me SuspendLayout()　　 TreeView 　　Me TreeView Dock = System Windows Forms DockStyle Left　Me TreeView ImageList = Me ImageList 　Me TreeView Location = New System Drawing Point( )　Me TreeView Name = TreeView 　Me TreeView Size = New System Drawing Size( )　Me TreeView TabIndex = 　　 ImageList 　　Me ImageList ImageSize = New System Drawing Size( )　Me ImageList ImageStream = CType(resources GetObject( ImageList ImageStream ) System Windows Forms ImageListStreamer)　Me ImageList TransparentColor = System Drawing Color Transparent　　 btnOpenBrower　　Me btnOpenBrower Location = New System Drawing Point( )　Me btnOpenBrower Name = btnOpenBrower 　Me btnOpenBrower Size = New System Drawing Size( )　Me btnOpenBrower TabIndex = 　Me btnOpenBrower Text = Open Brower 　　 Form 　　Me AutoScaleBaseSize = New System Drawing Size( )　Me ClientSize = New System Drawing Size( )　Me Controls Add(Me btnOpenBrower)　Me Controls Add(Me TreeView )　Me Name = Form 　Me Text = Form 　Me ResumeLayout(False)End Sub#End RegionPrivate Sub OpenBrower()　Dim f As New FolderBrowserDialog　If f ShowDialog = DialogResult OK Then　　Me TreeView Nodes Clear()　　Me SuspendLayout()　　Dim nodeTemp As TreeNode = CType(Me Invoke(New AddTreeNodeHandler(AddressOf Me AddFileToTreeview) New Object() f SelectedPath) TreeNode)　　Me AddFile(New DirectoryInfo(f SelectedPath) nodeTemp)　　Me ResumeLayout(False)　End IfEnd SubPrivate Sub AddFile(ByVal dirPath As DirectoryInfo ByVal node As TreeNode)　Dim tempHandler As New AddFileHandler(AddressOf Me AddFileToTreeNode)　For Each dir As DirectoryInfo In dirPath GetDirectories()　　Dim nodeTemp As TreeNode = CType(Me Invoke(tempHandler New Object() dir Name CLASSIO Directory node) TreeNode)　　Me AddFile(dir nodeTemp)　Next　For Each file As FileInfo In dirPath GetFiles( * dll )　　Me Invoke(tempHandler New Object() file Name CLASSIO File node)　NextEnd SubPrivate Function AddFileToTreeNode(ByVal str As String ByVal cls As CLASSIO ByVal node As TreeNode) As TreeNode　Dim nodeTemp As New TreeNode(str)　nodeTemp ImageIndex = CInt(cls)　node Nodes Add(nodeTemp)　nodeTemp SelectedImageIndex = nodeTemp ImageIndex　Return nodeTempEnd FunctionPrivate Function AddFileToTreeview(ByVal str As String) As TreeNode　Dim nodeTemp As New TreeNode(str)　Me TreeView Nodes Add(nodeTemp)　Return nodeTemp　nodeTemp SelectedImageIndex = CInt(CLASSIO Directory)End FunctionPrivate Sub btnOpenBrower_Click(ByVal sender As System Object ByVal e As System EventArgs) Handles btnOpenBrower Click　多线程　Dim t As Threading Thread = New Threading Thread(AddressOf Me OpenBrower)　t Start()　　单线程　 Me OpenBrower()End SubEnd ClassPublic Enum CLASSIO　File = 　Directory = End EnumPublic Delegate Function AddFileHandler(ByVal str As String ByVal cls As CLASSIO ByVal Node As TreeNode) As TreeNodePublic Delegate Function AddTreeNodeHandler(ByVal str As String) As TreeNode cha138/Article/program/net/201311/13318