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FileSystemObject(FSO) 示例代码
发布时间：2008-11-20   点击：   来源：本站原创   录入者：佚名
  Microsoft(R) Scripting 库 - FileSystemObject

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：

  1. 创建一个标准的 Web 页，后缀名为 .asp。
  2. 把下面的示例代码复制到 <BODY>...</BODY> 标记之间的文件中。
  3. 把所有代码包装器到 <%...%> 标记内。
  4. 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。
  5. 把 <%...%> 标记放置在 Option Explicit 语句周围，以保证它在服务器端运行。
  6. 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。 

' 

''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''



Option Explicit



''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

'

' 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。

' 

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'

' 一些容易取得的全局变量

'

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Dim TabStop

Dim NewLine



Const 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 





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'

' 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 = S



End 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 = S



End 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 = S



End 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

' 

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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 = S



End 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 = S



End 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 = S



End 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

'

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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





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'

' 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 & "\Beatles\OctopusGarden.txt")



	Set File = FSO.GetFile(TestFilePath & "\Beatles\BathroomWindow.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.Delete



End 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.Close



End 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 & "\Beatles\OctopusGarden.txt", OpenFileForReading)

	

	S = TextStream.ReadAll & NewLine & NewLine

	TextStream.Close



	Set File = FSO.GetFile(TestFilePath & "\Beatles\BathroomWindow.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:\Test\ReadMe.txt

' C:\Test\Beatles

' C:\Test\Beatles\OctopusGarden.txt

' C:\Test\Beatles\BathroomWindow.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 = True



End Function







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'

' 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
 

相信这个例子已经含盖了大部分的FSO的应用，大家可以根据这个例子来修改，得到自己
想要的功能，期待和大家交流：）
cpplus

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