VB中如何查找文件

是不知道路径的。要怎么查找文件？

比如 我想在 TEXT 中输入 一些字，然后就进行查找

尽可能写简单点，因为刚学VB

输入文字后，从哪里找呢，是找这些文字还是路径文件。

新建一个form命名为drvscan,其中代码如下

Option Explicit Dim PicHeight%, hLB&, FileSpec$, UseFileSpec% Dim TotalDirs%, TotalFiles%, Running% Dim WFD As WIN32_FIND_DATA, hItem&, hFile& Const vbBackslash = "\" Const vbAllFiles = "*.*" Const vbKeyDot = 46

Private Sub Form_Load() ScaleMode = vbPixels PicHeight% = Picture1.Height hLB& = List1.hwnd SendMessage hLB&, LB_INITSTORAGE, 30000&, ByVal 30000& * 200 Move (Screen.Width - Width) * 0.5, (Screen.Height - Height) * 0.5 End Sub

Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer) If KeyCode = vbKeyEscape And Running% Then Running% = False End Sub

Private Sub Form_Resize() MoveWindow hLB&, 0, 0, ScaleWidth, ScaleHeight - PicHeight%, True End Sub

Private Sub Form_Unload(Cancel As Integer) Set Form1 = Nothing End End Sub

Private Sub mnuFindFiles_Click() If Running% Then: Running% = False: Exit Sub Dim drvbitmask&, maxpwr%, pwr% On Error Resume Next FileSpec$ = InputBox("Enter a file spec:" & vbCrLf & vbCrLf & _ "Searching will begin at drive A and continue " & _ "until no more drives are found. " & _ "Click Stop! at any time." & vbCrLf & _ "The * and ? wildcards can be used.", _ "Find File(s)", "*.exe") If Len(FileSpec$) = 0 Then Exit Sub MousePointer = 11 Running% = True UseFileSpec% = True mnuFindFiles.Caption = "&Stop!" mnuFolderInfo.Enabled = False List1.Clear drvbitmask& = GetLogicalDrives() If drvbitmask& Then maxpwr% = Int(Log(drvbitmask&) / Log(2)) ' a little math... For pwr% = 0 To maxpwr% If Running% And (2 ^ pwr% And drvbitmask&) Then _ Call SearchDirs(Chr$(vbKeyA + pwr%) & ":\") Next End If Running% = False UseFileSpec% = False mnuFindFiles.Caption = "&Find File(s)..." mnuFolderInfo.Enabled = True MousePointer = 0

Picture1.Cls Picture1.Print "Find File(s): " & List1.ListCount & " items found matching " & """" & FileSpec$ & """" Beep End Sub

Private Sub mnuFolderInfo_Click() If Running% Then: Running% = False: Exit Sub Dim searchpath$ On Error Resume Next

searchpath$ = InputBox("Enter a valid explicit path:", "Folder Info", "C:\") If Len(searchpath$) < 2 Then Exit Sub If Mid$(searchpath$, 2, 1) <> ":" Then Exit Sub If Right$(searchpath$, 1) <> vbBackslash Then searchpath$ = searchpath$ & vbBackslash If FindClose(FindFirstFile(searchpath$ & vbAllFiles, WFD)) = False Then MsgBox searchpath$, vbInformation, "Path is invalid": Exit Sub End If

MousePointer = 11 Running% = True mnuFolderInfo.Caption = "&Stop!" mnuFindFiles.Enabled = False List1.Clear

TotalDirs% = 0 TotalFiles% = 0 Call SearchDirs(searchpath$) Running% = False mnuFolderInfo.Caption = "&Folder Info..." mnuFindFiles.Enabled = True Picture1.Cls MousePointer = 0

MsgBox "Total folders: " & vbTab & TotalDirs% & vbCrLf & _ "Total files: " & vbTab & TotalFiles%, , _ "Folder Info for: " & searchpath$ End Sub

Private Sub SearchDirs(curpath$) ' curpath$ is passed w/ trailing "\" Dim dirs%, dirbuf$(), i% Picture1.Cls Picture1.Print "Searching " & curpath$

DoEvents If Not Running% Then Exit Sub hItem& = FindFirstFile(curpath$ & vbAllFiles, WFD) If hItem& <> INVALID_HANDLE_VALUE Then Do If (WFD.dwFileAttributes And vbDirectory) Then If Asc(WFD.cFileName) <> vbKeyDot Then TotalDirs% = TotalDirs% + 1 If (dirs% Mod 10) = 0 Then ReDim Preserve dirbuf$(dirs% + 10) dirs% = dirs% + 1 dirbuf$(dirs%) = Left$(WFD.cFileName, InStr(WFD.cFileName, vbNullChar) - 1) End If ElseIf Not UseFileSpec% Then TotalFiles% = TotalFiles% + 1 End If Loop While FindNextFile(hItem&, WFD) Call FindClose(hItem&) End If If UseFileSpec% Then SendMessage hLB&, WM_SETREDRAW, 0, 0 Call SearchFileSpec(curpath$) SendMessage hLB&, WM_VSCROLL, SB_BOTTOM, 0 SendMessage hLB&, WM_SETREDRAW, 1, 0 End If For i% = 1 To dirs%: SearchDirs curpath$ & dirbuf$(i%) & vbBackslash: Next i% End Sub

Private Sub SearchFileSpec(curpath$) ' curpath$ is passed w/ trailing "\" hFile& = FindFirstFile(curpath$ & FileSpec$, WFD) If hFile& <> INVALID_HANDLE_VALUE Then Do DoEvents If Not Running% Then Exit Sub SendMessage hLB&, LB_ADDSTRING, 0, _ ByVal curpath$ & Left$(WFD.cFileName, InStr(WFD.cFileName, vbNullChar) - 1) Loop While FindNextFile(hFile&, WFD) Call FindClose(hFile&) End If

End Sub 在建立一个模块,命名为drvscan,代码如下

Option Explicit

Declare Function MoveWindow Lib "user32" _ (ByVal hwnd As Long, _ ByVal x As Long, ByVal y As Long, _ ByVal nWidth As Long, ByVal nHeight As Long, _ ByVal bRepaint As Long) As Long

Declare Function SendMessage Lib "user32" Alias "SendMessageA" _ (ByVal hwnd As Long, ByVal wMsg As Long, _ ByVal wParam As Long, lParam As Any) As Long Public Const LB_INITSTORAGE = &H1A8 Public Const LB_ADDSTRING = &H180

Public Const WM_SETREDRAW = &HB Public Const WM_VSCROLL = &H115 Public Const SB_BOTTOM = 7 Declare Function GetLogicalDrives Lib "kernel32" () As Long Declare Function FindFirstFile Lib "kernel32" Alias "FindFirstFileA" _ (ByVal lpFileName As String, lpFindFileData As WIN32_FIND_DATA) As Long Public Const INVALID_HANDLE_VALUE = -1 Declare Function FindNextFile Lib "kernel32" Alias "FindNextFileA" _ (ByVal hFindFile As Long, lpFindFileData As WIN32_FIND_DATA) As Long Declare Function FindClose Lib "kernel32" (ByVal hFindFile As Long) As Long

Type FILETIME dwLowDateTime As Long dwHighDateTime As Long End Type

Public Const MaxLFNPath = 260

Type WIN32_FIND_DATA dwFileAttributes As Long ftCreationTime As FILETIME ftLastAccessTime As FILETIME ftLastWriteTime As FILETIME nFileSizeHigh As Long nFileSizeLow As Long dwReserved0 As Long dwReserved1 As Long cFileName As String * MaxLFNPath cShortFileName As String * 14 End Type

Private Sub Command1_Click() If DirText1.Text , vbDirectory) <> "" Then Text2.Text = "c:\ABC" Else Text2.Text = "不存在目标文件夹" End If

End Sub

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