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Thread: Searching the hard drive through VB

  1. #1

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    Searching the hard drive through VB

    Hi ppl

    Is there any code out there that I can use to search the system for a certain file.

    Also my program needs to search, quietly, without the user being disturbed by excess hard drive usage.....When certain files are found then the program will take appropriate action.

    Is there a way to get it to search slowly or ??

    Thanks
    KT

  2. #2
    Software Eng. Megatron's Avatar
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    Try the following example from allapi.net
    VB Code:
    1. 'Create a form with a command button (command1), a list box (list1)
    2. 'and four text boxes (text1, text2, text3 and text4).
    3. 'Type in the first textbox a startingpath like c:\
    4. 'and in the second textbox you put a pattern like *.* or *.txt
    5.  
    6. Private Declare Function FindFirstFile Lib "kernel32" Alias "FindFirstFileA" (ByVal lpFileName As String, lpFindFileData As WIN32_FIND_DATA) As Long
    7. Private Declare Function FindNextFile Lib "kernel32" Alias "FindNextFileA" (ByVal hFindFile As Long, lpFindFileData As WIN32_FIND_DATA) As Long
    8. Private Declare Function GetFileAttributes Lib "kernel32" Alias "GetFileAttributesA" (ByVal lpFileName As String) As Long
    9. Private Declare Function FindClose Lib "kernel32" (ByVal hFindFile As Long) As Long
    10.  
    11. Const MAX_PATH = 260
    12. Const MAXDWORD = &HFFFF
    13. Const INVALID_HANDLE_VALUE = -1
    14. Const FILE_ATTRIBUTE_ARCHIVE = &H20
    15. Const FILE_ATTRIBUTE_DIRECTORY = &H10
    16. Const FILE_ATTRIBUTE_HIDDEN = &H2
    17. Const FILE_ATTRIBUTE_NORMAL = &H80
    18. Const FILE_ATTRIBUTE_READONLY = &H1
    19. Const FILE_ATTRIBUTE_SYSTEM = &H4
    20. Const FILE_ATTRIBUTE_TEMPORARY = &H100
    21.  
    22. Private Type FILETIME
    23.     dwLowDateTime As Long
    24.     dwHighDateTime As Long
    25. End Type
    26.  
    27. Private Type WIN32_FIND_DATA
    28.     dwFileAttributes As Long
    29.     ftCreationTime As FILETIME
    30.     ftLastAccessTime As FILETIME
    31.     ftLastWriteTime As FILETIME
    32.     nFileSizeHigh As Long
    33.     nFileSizeLow As Long
    34.     dwReserved0 As Long
    35.     dwReserved1 As Long
    36.     cFileName As String * MAX_PATH
    37.     cAlternate As String * 14
    38. End Type
    39. Function StripNulls(OriginalStr As String) As String
    40.     If (InStr(OriginalStr, Chr(0)) > 0) Then
    41.         OriginalStr = Left(OriginalStr, InStr(OriginalStr, Chr(0)) - 1)
    42.     End If
    43.     StripNulls = OriginalStr
    44. End Function
    45.  
    46. Function FindFilesAPI(path As String, SearchStr As String, FileCount As Integer, DirCount As Integer)
    47.     'KPD-Team 1999
    48.     'E-Mail: [email][email protected][/email]
    49.     'URL: [url]http://www.allapi.net/[/url]
    50.  
    51.     Dim FileName As String ' Walking filename variable...
    52.     Dim DirName As String ' SubDirectory Name
    53.     Dim dirNames() As String ' Buffer for directory name entries
    54.     Dim nDir As Integer ' Number of directories in this path
    55.     Dim i As Integer ' For-loop counter...
    56.     Dim hSearch As Long ' Search Handle
    57.     Dim WFD As WIN32_FIND_DATA
    58.     Dim Cont As Integer
    59.     If Right(path, 1) <> "\" Then path = path & "\"
    60.     ' Search for subdirectories.
    61.     nDir = 0
    62.     ReDim dirNames(nDir)
    63.     Cont = True
    64.     hSearch = FindFirstFile(path & "*", WFD)
    65.     If hSearch <> INVALID_HANDLE_VALUE Then
    66.         Do While Cont
    67.         DirName = StripNulls(WFD.cFileName)
    68.         ' Ignore the current and encompassing directories.
    69.         If (DirName <> ".") And (DirName <> "..") Then
    70.             ' Check for directory with bitwise comparison.
    71.             If GetFileAttributes(path & DirName) And FILE_ATTRIBUTE_DIRECTORY Then
    72.                 dirNames(nDir) = DirName
    73.                 DirCount = DirCount + 1
    74.                 nDir = nDir + 1
    75.                 ReDim Preserve dirNames(nDir)
    76.             End If
    77.         End If
    78.         Cont = FindNextFile(hSearch, WFD) 'Get next subdirectory.
    79.         Loop
    80.         Cont = FindClose(hSearch)
    81.     End If
    82.     ' Walk through this directory and sum file sizes.
    83.     hSearch = FindFirstFile(path & SearchStr, WFD)
    84.     Cont = True
    85.     If hSearch <> INVALID_HANDLE_VALUE Then
    86.         While Cont
    87.             FileName = StripNulls(WFD.cFileName)
    88.             If (FileName <> ".") And (FileName <> "..") Then
    89.                 FindFilesAPI = FindFilesAPI + (WFD.nFileSizeHigh * MAXDWORD) + WFD.nFileSizeLow
    90.                 FileCount = FileCount + 1
    91.                 List1.AddItem path & FileName
    92.             End If
    93.             Cont = FindNextFile(hSearch, WFD) ' Get next file
    94.         Wend
    95.         Cont = FindClose(hSearch)
    96.     End If
    97.     ' If there are sub-directories...
    98.     If nDir > 0 Then
    99.         ' Recursively walk into them...
    100.         For i = 0 To nDir - 1
    101.             FindFilesAPI = FindFilesAPI + FindFilesAPI(path & dirNames(i) & "\", SearchStr, FileCount, DirCount)
    102.         Next i
    103.     End If
    104. End Function
    105. Sub Command1_Click()
    106.     Dim SearchPath As String, FindStr As String
    107.     Dim FileSize As Long
    108.     Dim NumFiles As Integer, NumDirs As Integer
    109.     Screen.MousePointer = vbHourglass
    110.     List1.Clear
    111.     SearchPath = Text1.Text
    112.     FindStr = Text2.Text
    113.     FileSize = FindFilesAPI(SearchPath, FindStr, NumFiles, NumDirs)
    114.     Text3.Text = NumFiles & " Files found in " & NumDirs + 1 & " Directories"
    115.     Text4.Text = "Size of files found under " & SearchPath & " = " & Format(FileSize, "#,###,###,##0") & " Bytes"
    116.     Screen.MousePointer = vbDefault
    117. End Sub

  3. #3

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    Thanks MEga

    Will give it a go..

    Could you take a look at the question i posted in API if you have a minute.

    That one is what i really need to be able to do.....

    THX again.
    KT

  4. #4
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    That code is good because it makes a great use of the Windows API.

  5. #5
    Frenzied Member zuperman's Avatar
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  6. #6
    Software Eng. Megatron's Avatar
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    Originally posted by King_Tweaker
    Thanks MEga

    Will give it a go..

    Could you take a look at the question i posted in API if you have a minute.

    That one is what i really need to be able to do.....

    THX again.
    KT
    Sure. What's the link?

  7. #7

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    .

    Thanks MEga

    http://www.vbforums.com/showthread.p...hreadid=208764

    Not sure if it is possible, what i am trying to do...

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