vb.net获取磁盘盘符 vba中写磁盘文件的命令是-乐山大橙子建站

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vb.net获取磁盘盘符 vba中写磁盘文件的命令是

vb.net 磁盘文件列表，界面如图，在.net下如何实现？

预先准备三个图标文件，用于树型控件中显示磁盘符号和文件夹的图像之用。

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1、窗体上添加控件如下：

组合框控件 ComboBox1，树型控件 TreeView1，列表框控件 ListBox1，图像列表控件 ImageList1。

选中TreeView1，设置其ImageList属性为ImageList1。

2、设置属性

选中图像列表控件 ImageList1，在属性窗口里，选中属性Images，单击三个小点按钮，出现图像集合编辑器窗口，单击[添加按钮]，一一把准备好的图标文件进行添加，注意先后次序，如果不符合要求可以通过上下移动按钮重新改变次序。完成后单击[确定]。

运行图如下：

完整代码如下：

Imports System.IO

Public Class Form1

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

'添加系统所有磁盘目录符号

For Each MyDrive As String In Environment.GetLogicalDrives()

ComboBox1.Items.Add(MyDrive)

'显示第一个磁盘符号

ComboBox1.Text = ComboBox1.Items(0)

End Sub

'递归过程添加目录树

Public Sub AddDirectory(ByVal strFatherPath As String, ByVal strPath As String, ByVal nodeFather As TreeNode)

Dim i As Integer

Dim Mynode As New TreeNode

'先添加本目录

Mynode.Text = Strings.Replace(strPath, strFatherPath "\", "", , 1)

'为节点指定未被选中时显示的图标

Mynode.ImageIndex = 1

'为节点指定被选中时显示的图标

Mynode.SelectedImageIndex = 2

nodeFather.Nodes.Add(Mynode)

Application.DoEvents()

Try

Dim str() As String = Directory.GetDirectories(strPath)

'递归遍历该目录的子文件夹

For i = 0 To str.GetUpperBound(0)

AddDirectory(strPath, str(i), Mynode)

Catch ex As Exception

Debug.WriteLine(ex.Message)

End Try

Mynode = Nothing

End Sub

'根据给出的盘符添加目录树

Private Sub AddRootDirectory(ByVal DiscSymbol As String)

Dim Nynode As New TreeNode

'先把磁盘盘符添加到树中

TreeView1.Nodes.Clear()

Nynode.ImageIndex = 0

Nynode.Text = DiscSymbol

Nynode.SelectedImageIndex = -1

TreeView1.Nodes.Add(Nynode)

Dim i As Integer

'获取磁盘根目录下的文件夹

Dim str() As String = Directory.GetDirectories(DiscSymbol "\")

For i = 0 To str.GetUpperBound(0)

'调用递归过程遍历该文件夹里的所有子文件夹，并添加到树型控件

AddDirectory(DiscSymbol, str(i), Nynode)

Nynode = Nothing

End Sub

Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged

'根据磁盘符号的变更，显示根目录里的文件

ListBox1.Items.Clear()

For Each MyFile As String In System.IO.Directory.GetFiles(ComboBox1.Text)

ListBox1.Items.Add(MyFile)

'根据磁盘符号的变更，重新显示目录树

Dim DiscSymbol As String

DiscSymbol = Microsoft.VisualBasic.Left(ComboBox1.Text, Len(ComboBox1.Text) - 1)

Call AddRootDirectory(DiscSymbol)

End Sub

'递归过程根据子目录寻找上级目录名--从而构成完整的目录路径

Private Sub AllPath(ByVal ThisNode As TreeNode, ByRef MyPathName As String)

If ThisNode.Level 1 Then

'该节点层数大于1，其父节点不是磁盘根目录

MyPathName = ThisNode.Parent.Text "\" MyPathName

Dim MyNode As TreeNode = ThisNode.Parent

Call AllPath(MyNode, MyPathName)

Else

'该节点层数等于1，其父节点就是磁盘根目录

MyPathName = ComboBox1.Text MyPathName

End If

End Sub

Private Sub TreeView1_AfterSelect(ByVal sender As System.Object, ByVal e As System.Windows.Forms.TreeViewEventArgs) Handles TreeView1.AfterSelect

'为了搜索选中的节点对应目录的文件，需要组成全路径

Dim MyAllPathName As String = TreeView1.SelectedNode.Text

Dim MyNode As TreeNode = TreeView1.SelectedNode

If TreeView1.SelectedNode.Level = 0 Then

'如果选中的是根节点

MyAllPathName = ComboBox1.Text

Else

'如果选中的是非根节点，调用递归过程组成全路径

Call AllPath(MyNode, MyAllPathName)

MyAllPathName = MyAllPathName "\"

End If

'根据路径，搜索文件名并显示

ListBox1.Items.Clear()

For Each MyFile As String In System.IO.Directory.GetFiles(MyAllPathName)

ListBox1.Items.Add(MyFile)

End Sub

End Class

VB获取盘符的名字

不知道是不是你想要的...

用FSO(文件系统对象模型)实现

FSO对象模型包含在SCRIPTING类型库(SCRRUN.DLL)中。调用方法如下：

在项目菜单中选择引用，在COM中选择Microsoft Scripting Runtime

在代码最顶端添加Imports Scripting，在按钮的单击事件中加入以下代码：

Imports Scripting

Private Sub btnFso_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnFso.Click

Dim Fso As New FileSystemObject

Dim drvDisk As Drive, strResult As String

drvDisk = Fso.GetDrive("C:\")

strResult = "Drive " "C:\" vbCrLf

strResult += "磁盘卷标:" drvDisk.VolumeName vbCrLf

strResult += "磁盘序列号:" drvDisk.SerialNumber vbCrLf

strResult += "磁盘类型:" drvDisk.DriveType vbCrLf

strResult += "文件系统:" drvDisk.FileSystem vbCrLf

strResult += "磁盘容量(G): " FormatNumber(((drvDisk.TotalSize / 1024) / 1024) / 1024, 2, , , Microsoft.VisualBasic.TriState.True) vbCrLf

strResult += "可用空间(G): " FormatNumber(((drvDisk.FreeSpace / 1024) / 1024) / 1024, 2, , , Microsoft.VisualBasic.TriState.True) vbCrLf

strResult += "已用空间(G):" FormatNumber(((((drvDisk.TotalSize - drvDisk.FreeSpace) / 1024) / 1024) / 1024), 2, , , Microsoft.VisualBasic.TriState.True)

MsgBox(strResult)

End Sub

VB.NET 怎样取得盘符并且知道它属于哪个磁盘

依次读出ds中每个项的VolumeLabel属性就可以了Dim ds() As System.IO.DriveInfods = System.IO.DriveInfo.GetDrives();

VB.NET检测插入U盘时执行某段代码，并能获取U盘盘符

以下内容为网络提供,但我自己验证可行,供你参考.

Imports System.IO

Public Class Form1

Public Const WM_DEVICECHANGE = H219

Public Const DBT_DEVICEARRIVAL = H8000

Public Const DBT_CONFIGCHANGECANCELED = H19

Public Const DBT_CONFIGCHANGED = H18

Public Const DBT_CUSTOMEVENT = H8006

Public Const DBT_DEVICEQUERYREMOVE = H8001

Public Const DBT_DEVICEQUERYREMOVEFAILED = H8002

Public Const DBT_DEVICEREMOVECOMPLETE = H8004

Public Const DBT_DEVICEREMOVEPENDING = H8003

Public Const DBT_DEVICETYPESPECIFIC = H8005

Public Const DBT_DEVNODES_CHANGED = H7

Public Const DBT_QUERYCHANGECONFIG = H17

Public Const DBT_USERDEFINED = HFFFF

Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)

If m.Msg = WM_DEVICECHANGE Then

Select Case m.WParam

Case WM_DEVICECHANGE

Case DBT_DEVICEARRIVAL 'U盘插入

ComboBox1.Items.Clear()

Dim s() As DriveInfo = DriveInfo.GetDrives

For Each drive As DriveInfo In s

If drive.DriveType = DriveType.Removable Then

ListBox1.Items.Add("U盘已插入！盘符为:" + drive.Name.ToString())

ComboBox1.Items.Add(drive.Name)

End If

BtnWrite.Enabled = True

BtnRead.Enabled = True

Case DBT_CONFIGCHANGECANCELED

Case DBT_CONFIGCHANGED

Case DBT_CUSTOMEVENT

Case DBT_DEVICEQUERYREMOVE

Case DBT_DEVICEQUERYREMOVEFAILED

Case DBT_DEVICEREMOVECOMPLETE 'U盘卸载

ListBox1.Items.Add("U盘卸载！")

BtnWrite.Enabled = False

BtnRead.Enabled = False

Case DBT_DEVICEREMOVEPENDING

Case DBT_DEVICETYPESPECIFIC

Case DBT_DEVNODES_CHANGED

Case DBT_QUERYCHANGECONFIG

Case DBT_USERDEFINED

End Select

End If

MyBase.WndProc(m)

End Sub

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

ListBox1.Items.Add("请您现在插入U盘至USB接口！")

End Sub

Private Sub BtnWrite_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnWrite.Click

If ComboBox1.Text = "" Then

MsgBox("请选择U盘盘符！", MsgBoxStyle.Exclamation, "Warn")

Else

Dim Writer As StreamWriter = Nothing

Try

Dim fileName As String = ComboBox1.Text + "Test.txt"

Writer = New StreamWriter(fileName)

Writer.WriteLine(InputBox("老四，请输入要保存的字符串", "输入信息", "Input then Test String! hehe!"))

MsgBox("Write to " + fileName + " Success!")

Catch ex As Exception

MsgBox(ex.Message, MsgBoxStyle.Critical, "Write 失败")

Finally

If Writer IsNot Nothing Then Writer.Close()

End Try

End If

End Sub

Private Sub BtnRead_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnRead.Click

If ComboBox1.Text = "" Then

MsgBox("请选择U盘盘符！", MsgBoxStyle.Exclamation, "Warn")

Else

Dim Reader As StreamReader = Nothing

Try

Dim fileName As String = ComboBox1.Text + "Test.txt"

Reader = New StreamReader(fileName)

MsgBox("Read from " + fileName + vbCrLf + Reader.ReadToEnd, MsgBoxStyle.Information, "Info")

Catch ex As Exception

MsgBox(ex.Message, MsgBoxStyle.Critical, "Read 失败")

Finally

If Reader IsNot Nothing Then Reader.Close()

End Try

End If

End Sub

End Class

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新闻中心

vb.net 磁盘文件列表，界面如图，在.net下如何实现？

VB获取盘符的名字

VB.NET 怎样取得盘符并且知道它属于哪个磁盘

VB.NET检测插入U盘时执行某段代码，并能获取U盘盘符

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