VB.NET檢測插入U盤時執(zhí)行某段代碼，并能獲取U盤盤符

以下內容為網絡提供,但我自己驗證可行,供你參考.

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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盤插入

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盤已插入！盤符為:" + drive.Name.ToString())

ComboBox1.Items.Add(drive.Name)

End If

Next

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盤卸載

ListBox1.Items.Add("U盤卸載！")

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("請您現在插入U盤至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("請選擇U盤盤符！", 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，請輸入要保存的字符串", "輸入信息", "Input then Test String! hehe!"))

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

Catch ex As Exception

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

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("請選擇U盤盤符！", 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 失敗")

Finally

If Reader IsNot Nothing Then Reader.Close()

End Try

End If

End Sub

End Class

VB.NET 怎樣取得盤符并且知道它屬于哪個磁盤

依次讀出ds中每個項的VolumeLabel屬性就可以了Dim ds() As System.IO.DriveInfods = System.IO.DriveInfo.GetDrives();

vb.net 磁盤文件列表，界面如圖，在.net下如何實現？

預先準備三個圖標文件，用于樹型控件中顯示磁盤符號和文件夾的圖像之用。

1、窗體上添加控件如下：

組合框控件 ComboBox1，樹型控件 TreeView1，列表框控件 ListBox1，圖像列表控件 ImageList1。

選中TreeView1，設置其ImageList屬性為ImageList1。

2、設置屬性

選中圖像列表控件 ImageList1，在屬性窗口里，選中屬性Images，單擊三個小點按鈕，出現圖像集合編輯器窗口，單擊[添加按鈕]，一一把準備好的圖標文件進行添加，注意先后次序，如果不符合要求可以通過上下移動按鈕重新改變次序。完成后單擊[確定]。

運行圖如下：

完整代碼如下：

Imports?System.IO

Public?Class?Form1

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

'添加系統(tǒng)所有磁盤目錄符號

For?Each?MyDrive?As?String?In?Environment.GetLogicalDrives()

ComboBox1.Items.Add(MyDrive)

Next

'顯示第一個磁盤符號

ComboBox1.Text?=?ComboBox1.Items(0)

End?Sub

'遞歸過程添加目錄樹

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

Dim?i?As?Integer

Dim?Mynode?As?New?TreeNode

'先添加本目錄

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

'為節(jié)點指定未被選中時顯示的圖標

Mynode.ImageIndex?=?1

'為節(jié)點指定被選中時顯示的圖標

Mynode.SelectedImageIndex?=?2

nodeFather.Nodes.Add(Mynode)

Application.DoEvents()

Try

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

'遞歸遍歷該目錄的子文件夾

For?i?=?0?To?str.GetUpperBound(0)

AddDirectory(strPath,?str(i),?Mynode)

Next

Catch?ex?As?Exception

Debug.WriteLine(ex.Message)

End?Try

Mynode?=?Nothing

End?Sub

'根據給出的盤符添加目錄樹

Private?Sub?AddRootDirectory(ByVal?DiscSymbol?As?String)

Dim?Nynode?As?New?TreeNode

'先把磁盤盤符添加到樹中

TreeView1.Nodes.Clear()

Nynode.ImageIndex?=?0

Nynode.Text?=?DiscSymbol

Nynode.SelectedImageIndex?=?-1

TreeView1.Nodes.Add(Nynode)

Dim?i?As?Integer

'獲取磁盤根目錄下的文件夾

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

For?i?=?0?To?str.GetUpperBound(0)

'調用遞歸過程遍歷該文件夾里的所有子文件夾，并添加到樹型控件

AddDirectory(DiscSymbol,?str(i),?Nynode)

Next

Nynode?=?Nothing

End?Sub

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

'根據磁盤符號的變更，顯示根目錄里的文件

ListBox1.Items.Clear()

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

ListBox1.Items.Add(MyFile)

Next

'根據磁盤符號的變更，重新顯示目錄樹

Dim?DiscSymbol?As?String

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

Call?AddRootDirectory(DiscSymbol)

End?Sub

'遞歸過程根據子目錄尋找上級目錄名--從而構成完整的目錄路徑

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

If?ThisNode.Level??1?Then

'該節(jié)點層數大于1，其父節(jié)點不是磁盤根目錄

MyPathName?=?ThisNode.Parent.Text??"\"??MyPathName

Dim?MyNode?As?TreeNode?=?ThisNode.Parent

Call?AllPath(MyNode,?MyPathName)

Else

'該節(jié)點層數等于1，其父節(jié)點就是磁盤根目錄

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

'為了搜索選中的節(jié)點對應目錄的文件，需要組成全路徑

Dim?MyAllPathName?As?String?=?TreeView1.SelectedNode.Text

Dim?MyNode?As?TreeNode?=?TreeView1.SelectedNode

If?TreeView1.SelectedNode.Level?=?0?Then

'如果選中的是根節(jié)點

MyAllPathName?=?ComboBox1.Text

Else

'如果選中的是非根節(jié)點，調用遞歸過程組成全路徑

Call?AllPath(MyNode,?MyAllPathName)

MyAllPathName?=?MyAllPathName??"\"

End?If

'根據路徑，搜索文件名并顯示

ListBox1.Items.Clear()

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

ListBox1.Items.Add(MyFile)

Next

End?Sub

End?Class

vb(vb.net)能不能修改計算機中指定驅動器的盤符？ 我想在U盤插入時通過序列號識別指定設備并

Sub RenameVolume()

'利用Shell函數在命令提示符下執(zhí)行Diskpart命令的腳本，并存入日志文件

'達到替換邏輯盤符的目的

'在WindowsXp系統(tǒng)下測試成功

'獲取臨時文件路徑

Temp = Environ("TEMP") "\"

'獲取命令提示符路徑

Cmd = Environ("ComSpec")

'設置腳本文件和日志文件路徑

ScriptFile = Temp "DiskpartScript.txt"

ScriptLog = Temp "DiskpartScript.log"

'回車符和換行符

vbLfCr = vbLf vbCr

'腳本文件內容

'選擇卷e

'移除盤符e

'分配盤符m

'退出Diskpart

ScriptTxt = "select volume e" vbLf vbCr _

"Remove letter = e" vbLf vbCr _

"assign letter = m" vbLf vbCr _

"exit" vbLf vbCr

'打開腳本文件并讀取內容

Open ScriptFile For Output As #1

Print #1, ScriptTxt

Close #1

'打開錯誤處理

On Error Resume Next

'刪除原有日志文件

Kill ScriptLog

'關閉錯誤處理

On Error GoTo 0

'執(zhí)行腳本

ShellTxt = Cmd " /c ""diskpart.exe /S " ScriptFile " " ScriptLog """"

Shell ShellTxt

'打開錯誤處理

On Error Resume Next

Do

Err.Number = 0

'打開日志文件并讀取內容，因日志文件存取速度慢，必須以鎖定方式打開，否則會出錯

Open ScriptLog For Input Lock Read Write As #1

DoEvents

Loop Until Err.Number = 0

'關閉錯誤處理

On Error GoTo 0

'日志文件中含有中文字符，必須以InputB函數以字節(jié)方式讀取，否則長度會超出

LogTxt = InputB(LOF(1), #1)

Close #1

'轉換以字節(jié)方式讀取的日志文件內容

LogTxt = StrConv(LogTxt, vbUnicode)

'如果日志中出現兩次成功，則認為執(zhí)行成功，否則認為失敗

If Len(LogTxt) - Len(Replace(LogTxt, "成功", "", 1)) = 4 Then

MsgBox "盤符替換成功！"

Else

MsgBox "盤符替換失??！"

End If

'刪除臨時文件

Kill ScriptFile

Kill ScriptLog

End Sub