首页 / 编程脚本 / FileSystemObject 示例代码
在本节描述的示例代码,提供真实的例子来示范在 FileSystemObject 对象模式中可用的许多功能。该代码显示了如何一起使用对象模式的所有功能,以及如何在您自己的代码中有效地使用这些功能。
请注意,由于该代码是极一般的,所以要使该代码能够真正在您的机器上运行,可能需要一些其他代码和小小的变更。这些改变之所以必要,是因为在 Active Server Pages 和 Windows Scripting Host 之间,为输入和输出给用户采用了不同的方法。
要在 Active Server Pages 上运行该代码,则采取以下步骤:
创建一个标准的 Web 页,后缀名为 .asp。
把下面的示例代码复制到 <BODY>...</BODY> 标记之间的文件中。
把所有代码包装器到 <%...%> 标记内。
把 Option Explicit 语句从当前位置移动到 HTML 页的最顶部,甚至在 <HTML> 开始标记前。
把 <%...%> 标记放置在 Option Explicit 语句周围,以保证它在服务器端运行。
把下面的代码添加到示例代码末尾:
Sub Print(x)
Response.Write "<PRE><FONT FACE=""宋体"" SIZE=""1"">"
Response.Write x
Response.Write "</FONT></PRE>"
End Sub
Main
前面的代码增加一个将在服务器端运行,但在客户端显示结果的打印过程。要在 Windows Scripting Host 上运行该代码,则把下面的代码添加到示例代码的末尾:
Sub Print(x)
WScript.Echo x
End Sub
Main
下面就是示例代码:
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" FileSystemObject 示例代码
"Copyright 1998 Microsoft Corporation。 保留所有权利。
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
"""OptionExplicit""""""""""""""""""""""""""""""""""""""""""""""""""""
""""""""""""""""""""
" 对于代码质量:
" 1) 下面的代码有许多字符串操作,用"&"运算符来把短字符串连接在一起。由于
" 字符串连接是费时的,所以这是一种低效率的写代码方法。无论如何,它是
" 一种非常好维护的写代码方法,并且在这儿使用了这种方法,因为该程序执行
" 大量的磁盘操作,而磁盘操作比连接字符串所需的内存操作要慢得多。
" 记住这是示范代码,而不是产品代码。
"
" 2) 使用了 "Option Explicit",因为访问声明过的变量,比访问未声明的变量要
" 稍微快一些。它还能阻止在代码中发生错误,例如,把 DriveTypeCDROM 误拼
" 成了 DriveTypeCDORM 。
"
" 3) 为了使代码更可读,该代码中没有错误处理。虽然采取了防范措施,来保证代码
" 在普通情况下没有错误,但文件系统是不可预知的。在产品代码中,使用
" On Error Resume Next 和 Err 对象来捕获可能发生的错误。
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" 一些容易取得的全局变量
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
Dim TabStop
Dim NewLineConst TestDrive = "C"
Const TestFilePath = "C:Test""""""""""""""""""""""""""""""""""""""""""
"""""""""""""""""""""""""""""""
" 由 Drive.DriveType 返回的常数
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
Const DriveTypeRemovable = 1
Const DriveTypeFixed = 2
Const DriveTypeNetwork = 3
Const DriveTypeCDROM = 4
Const DriveTypeRAMDisk = 5""""""""""""""""""""""""""""""""""""""""""""
""""""""""""""""""""""""""""
" 由 File.Attributes 返回的常数
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
Const FileAttrNormal = 0
Const FileAttrReadOnly = 1
Const FileAttrHidden = 2
Const FileAttrSystem = 4
Const FileAttrVolume = 8
Const FileAttrDirectory = 16
Const FileAttrArchive = 32
Const FileAttrAlias = 64
Const FileAttrCompressed = 128""""""""""""""""""""""""""""""""""""""
""""""""""""""""""""""""""""""""""
" 用来打开文件的常数
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
Const OpenFileForReading = 1
Const OpenFileForWriting = 2
Const OpenFileForAppending = 8 """""""""""""""""""""""""""""""""
"""""""""""""""""""""""""""""""""""""""
" ShowDriveType
" 目的:
" 生成一个字符串,来描述给定 Drive 对象的驱动器类型。
" 示范下面的内容
" - Drive.DriveType
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
Function ShowDriveType(Drive) Dim S
Select Case Drive.DriveType
Case DriveTypeRemovable
S = "Removable"
Case DriveTypeFixed
S = "Fixed"
Case DriveTypeNetwork
S = "Network"
Case DriveTypeCDROM
S = "CD-ROM"
Case DriveTypeRAMDisk
S = "RAM Disk"
Case Else
S = "Unknown"
End Select ShowDriveType = SEnd Function""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
""""""""""""
" ShowFileAttr
" 目的:
" 生成一个字符串,来描述文件或文件夹的属性。
" 示范下面的内容
" - File.Attributes
" - Folder.Attributes
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
""""Function ShowFileAttr(File) " File 可以是文件或文件夹 Dim S
Dim Attr
Attr = File.Attributes If Attr = 0 Then
ShowFileAttr = "Normal"
Exit Function
End If If Attr And FileAttrDirectory Then S = S & "Directory "
If Attr And FileAttrReadOnly Then S = S & "Read-Only "
If Attr And FileAttrHidden Then S = S & "Hidden "
If Attr And FileAttrSystem Then S = S & "System "
If Attr And FileAttrVolume Then S = S & "Volume "
If Attr And FileAttrArchive Then S = S & "Archive "
If Attr And FileAttrAlias Then S = S & "Alias "
If Attr And FileAttrCompressed Then S = S & "Compressed " ShowFileAttr = SEnd Function""""""""""""""""""""""""""""""""""""""""""""""""""""""
""""""""""""""""""
" GenerateDriveInformation
" 目的:
" 生成一个字符串,来描述可用驱动器的当前状态。
" 示范下面的内容
" - FileSystemObject.Drives
" - Iterating the Drives collection
" - Drives.Count
" - Drive.AvailableSpace
" - Drive.DriveLetter
" - Drive.DriveType
" - Drive.FileSystem
" - Drive.FreeSpace
" - Drive.IsReady
" - Drive.Path
" - Drive.SerialNumber
" - Drive.ShareName
" - Drive.TotalSize
" - Drive.VolumeName
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
""Function GenerateDriveInformation(FSO) Dim Drives
Dim Drive
Dim S Set Drives = FSO.Drives
S = "Number of drives:" & TabStop & Drives.Count & NewLine & NewLine " 构造报告的第一行。
S = S & String(2, TabStop) & "Drive"
S = S & String(3, TabStop) & "File"
S = S & TabStop & "Total"
S = S & TabStop & "Free"
S = S & TabStop & "Available"
S = S & TabStop & "Serial" & NewLine " 构造报告的第二行。
S = S & "Letter"
S = S & TabStop & "Path"
S = S & TabStop & "Type"
S = S & TabStop & "Ready?"
S = S & TabStop & "Name"
S = S & TabStop & "System"
S = S & TabStop & "Space"
S = S & TabStop & "Space"
S = S & TabStop & "Space"
S = S & TabStop & "Number" & NewLine " 分隔行。
S = S & String(105, "-") & NewLine For Each Drive In Drives
S = S & Drive.DriveLetter
S = S & TabStop & Drive.Path
S = S & TabStop & ShowDriveType(Drive)
S = S & TabStop & Drive.IsReady If Drive.IsReady Then
If DriveTypeNetwork = Drive.DriveType Then
S = S & TabStop & Drive.ShareName
Else
S = S & TabStop & Drive.VolumeName
End If
S = S & TabStop & Drive.FileSystem
S = S & TabStop & Drive.TotalSize
S = S & TabStop & Drive.FreeSpace
S = S & TabStop & Drive.AvailableSpace
S = S & TabStop & Hex(Drive.SerialNumber)
End If S = S & NewLine Next GenerateDriveInformation = SEnd Function""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
""""""""""""""
" GenerateFileInformation
" 目的:
" 生成一个字符串,来描述文件的当前状态。
" 示范下面的内容
" - File.Path
" - File.Name
" - File.Type
" - File.DateCreated
" - File.DateLastAccessed
" - File.DateLastModified
" - File.Size
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
"""""""""""Function GenerateFileInformation(File) Dim S S = NewLine & "Path:" & TabStop & File.Path
S = S & NewLine & "Name:" & TabStop & File.Name
S = S & NewLine & "Type:" & TabStop & File.Type
S = S & NewLine & "Attribs:" & TabStop & ShowFileAttr(File)
S = S & NewLine & "Created:" & TabStop & File.DateCreated
S = S & NewLine & "Accessed:" & TabStop & File.DateLastAccessed
S = S & NewLine & "Modified:" & TabStop & File.DateLastModified
S = S & NewLine & "Size" & TabStop & File.Size & NewLine GenerateFileInformation = SEnd Function""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" GenerateFolderInformation
" 目的:
" 生成一个字符串,来描述文件夹的当前状态。
" 示范下面的内容
" - Folder.Path
" - Folder.Name
" - Folder.DateCreated
" - Folder.DateLastAccessed
" - Folder.DateLastModified
" - Folder.Size
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""Function GenerateFolderInformation(Folder) Dim S S = "Path:" & TabStop & Folder.Path
S = S & NewLine & "Name:" & TabStop & Folder.Name
S = S & NewLine & "Attribs:" & TabStop & ShowFileAttr(Folder)
S = S & NewLine & "Created:" & TabStop & Folder.DateCreated
S = S & NewLine & "Accessed:" & TabStop & Folder.DateLastAccessed
S = S & NewLine & "Modified:" & TabStop & Folder.DateLastModified
S = S & NewLine & "Size:" & TabStop & Folder.Size & NewLine GenerateFolderInformation = SEnd Function""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" GenerateAllFolderInformation
" 目的:
" 生成一个字符串,来描述一个文件夹和所有文件及子文件夹的当前状态。
" 示范下面的内容
" - Folder.Path
" - Folder.SubFolders
" - Folders.Count
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""Function GenerateAllFolderInformation(Folder) Dim S
Dim SubFolders
Dim SubFolder
Dim Files
Dim File S = "Folder:" & TabStop & Folder.Path & NewLine & NewLine
Set Files = Folder.Files If 1 = Files.Count Then
S = S & "There is 1 file" & NewLine
Else
S = S & "There are " & Files.Count & " files" & NewLine
End If If Files.Count <> 0 Then
For Each File In Files
S = S & GenerateFileInformation(File)
Next
End If Set SubFolders = Folder.SubFolders If 1 = SubFolders.Count Then
S = S & NewLine & "There is 1 sub folder" & NewLine & NewLine
Else
S = S & NewLine & "There are " & SubFolders.Count & " sub folders" & NewLine & NewLine
End If If SubFolders.Count <> 0 Then
For Each SubFolder In SubFolders
S = S & GenerateFolderInformation(SubFolder)
Next
S = S & NewLine
For Each SubFolder In SubFolders
S = S & GenerateAllFolderInformation(SubFolder)
Next
End If GenerateAllFolderInformation = SEnd Function"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
"""""""""
" GenerateTestInformation
" 目的:
" 生成一个字符串,来描述 C:Test 文件夹和所有文件及子文件夹的当前状态。
" 示范下面的内容
" - FileSystemObject.DriveExists
" - FileSystemObject.FolderExists
" - FileSystemObject.GetFolder
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
""Function GenerateTestInformation(FSO) Dim TestFolder
Dim S If Not FSO.DriveExists(TestDrive) Then Exit Function
If Not FSO.FolderExists(TestFilePath) Then Exit Function Set TestFolder = FSO.GetFolder(TestFilePath) GenerateTestInformation = GenerateAllFolderInformation(TestFolder) End Function"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
"""""""
" DeleteTestDirectory
" 目的:
" 清理 test 目录。
" 示范下面的内容
" - FileSystemObject.GetFolder
" - FileSystemObject.DeleteFile
" - FileSystemObject.DeleteFolder
" - Folder.Delete
" - File.Delete
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
"""Sub DeleteTestDirectory(FSO) Dim TestFolder
Dim SubFolder
Dim File
" 有两种方法可用来删除文件: FSO.DeleteFile(TestFilePath & "BeatlesOctopusGarden.txt") Set File = FSO.GetFile(TestFilePath & "BeatlesBathroomWindow.txt")
File.Delete " 有两种方法可用来删除文件夹:
FSO.DeleteFolder(TestFilePath & "Beatles")
FSO.DeleteFile(TestFilePath & "ReadMe.txt")
Set TestFolder = FSO.GetFolder(TestFilePath)
TestFolder.DeleteEnd Sub"""""""""""""""""""""""""""""""""""""""""
"""""""""""""""""""""""""""""""
" CreateLyrics
" 目的:
" 在文件夹中创建两个文本文件。
" 示范下面的内容
" - FileSystemObject.CreateTextFile
" - TextStream.WriteLine
" - TextStream.Write
" - TextStream.WriteBlankLines
" - TextStream.Close
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
"""Sub CreateLyrics(Folder) Dim TextStream
Set TextStream = Folder.CreateTextFile("OctopusGarden.txt")
TextStream.Write("Octopus" Garden ") " 请注意,该语句不添加换行到文件中。
TextStream.WriteLine("(by Ringo Starr)")
TextStream.WriteBlankLines(1)
TextStream.WriteLine("I"d like to be under the sea in an octopus" garden in the shade,")
TextStream.WriteLine("He"d let us in, knows where we"ve been -- in his octopus" garden in the shade.")
TextStream.WriteBlankLines(2)
TextStream.Close Set TextStream = Folder.CreateTextFile("BathroomWindow.txt")
TextStream.WriteLine("She Came In Through The Bathroom Window (by Lennon/McCartney)")
TextStream.WriteLine("")
TextStream.WriteLine("She came in through the bathroom window protected by a silver spoon")
TextStream.WriteLine("But now she sucks her thumb and wanders by the banks of her own lagoon")
TextStream.WriteBlankLines(2)
TextStream.CloseEnd Sub""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" GetLyrics
" 目的:
" 显示 lyrics 文件的内容。
" 示范下面的内容
" - FileSystemObject.OpenTextFile
" - FileSystemObject.GetFile
" - TextStream.ReadAll
" - TextStream.Close
" - File.OpenAsTextStream
" - TextStream.AtEndOfStream
" - TextStream.ReadLine
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
""""""""Function GetLyrics(FSO) Dim TextStream
Dim S
Dim File " 有多种方法可用来打开一个文本文件,和多种方法来从文件读取数据。
" 这儿用了两种方法来打开文件和读取文件: Set TextStream = FSO.OpenTextFile(TestFilePath & "BeatlesOctopusGarden.txt", OpenFileForReading)
S = TextStream.ReadAll & NewLine & NewLine
TextStream.Close Set File = FSO.GetFile(TestFilePath & "BeatlesBathroomWindow.txt")
Set TextStream = File.OpenAsTextStream(OpenFileForReading)
Do While Not TextStream.AtEndOfStream
S = S & TextStream.ReadLine & NewLine
Loop
TextStream.Close GetLyrics = S
End Function"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
"""""""
" BuildTestDirectory
" 目的:
" 创建一个目录分层结构来示范 FileSystemObject。
" 以这样的次序来创建分层结构:
" C:Test
" C:TestReadMe.txt
" C:TestBeatles
" C:TestBeatlesOctopusGarden.txt
" C:TestBeatlesBathroomWindow.txt
" 示范下面的内容
" - FileSystemObject.DriveExists
" - FileSystemObject.FolderExists
" - FileSystemObject.CreateFolder
" - FileSystemObject.CreateTextFile
" - Folders.Add
" - Folder.CreateTextFile
" - TextStream.WriteLine
" - TextStream.Close
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
""""""Function BuildTestDirectory(FSO) Dim TestFolder
Dim SubFolders
Dim SubFolder
Dim TextStream
" 排除(a)驱动器不存在,或(b)要创建的目录已经存在的情况。 If Not FSO.DriveExists(TestDrive) Then
BuildTestDirectory = False
Exit Function
End If If FSO.FolderExists(TestFilePath) Then
BuildTestDirectory = False
Exit Function
End If Set TestFolder = FSO.CreateFolder(TestFilePath) Set TextStream = FSO.CreateTextFile(TestFilePath & "ReadMe.txt")
TextStream.WriteLine("My song lyrics collection")
TextStream.Close Set SubFolders = TestFolder.SubFolders
Set SubFolder = SubFolders.Add("Beatles")
CreateLyrics SubFolder
BuildTestDirectory = TrueEnd Function""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
""""""""
" 主程序
" 首先,它创建一个 test 目录,以及一些子文件夹和文件。
" 然后,它转储有关可用磁盘驱动器和 test 目录的某些信息,
" 最后,清除 test 目录及其所有内容。
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
"""""""Sub Main Dim FSO " 设立全局变量。
TabStop = Chr(9)
NewLine = Chr(10)
Set FSO = CreateObject("Scripting.FileSystemObject") If Not BuildTestDirectory(FSO) Then
Print "Test directory already exists or cannot be created. Cannot continue."
Exit Sub
End If Print GenerateDriveInformation(FSO) & NewLine & NewLine
Print GenerateTestInformation(FSO) & NewLine & NewLine
Print GetLyrics(FSO) & NewLine & NewLine
DeleteTestDirectory(FSO)End Sub