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File System OperationsFile System Object Model:

The File System Object (FSO) model provides an object-based tool for working with folders and files. It allows us to use the familiar object. method syntax with a rich set of properties, methods, and events to process folders and files. We can also employ the traditional Visual Basic statements and commands.

The FSO model gives our application the ability to create, alter, move, and delete folders, or to determine if and where particular folders exist. It also enables us to get information about folders, such as their names and the date they were created or last modified.

The FSO model makes processing files much easier as well. When processing files, our primary goal is to store data in an efficient, easy-to-access format. We need to be able to create files, insert and change the data, and output (read) the data. Although we can store data in a database, doing so adds a significant amount of overhead to our application. We may not want to have such overhead, or our data access requirements may not call for the extra functionality associated with a full-featured database. In this case, storing our data in a text file or binary file is the most efficient solution.

The FSO model, contained in the Scripting type library (Scrrun.dll), supports the creation and manipulation of text files through the TextStream object; however, the FSO model does not support binary files. To manipulate binary files, use the FileOpen Function with the Binary keyword.

Examples

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1) Create a Folder

Option ExplicitDim objFSO, objFolder, strDirectorystrDirectory = "D:\Gcreddy"Set objFSO = CreateObject("Scripting.FileSystemObject")Set objFolder = objFSO.CreateFolder(strDirectory)

2) Delete a Folder

Set oFSO = CreateObject("Scripting.FileSystemObject")oFSO.DeleteFolder("E:\Gcreddy")

3) Copying Folders

Set oFSO=createobject("Scripting.Filesystemobject")oFSO.CopyFolder "E:\gcr", "C:\jvr", True

4) Checking weather the folder available or not, if not creating the folder

Option ExplicitDim objFSO, objFolder, strDirectorystrDirectory = "D:\Gcreddy"Set objFSO = CreateObject("Scripting.FileSystemObject")If objFSO.FolderExists(strDirectory) ThenSet objFolder = objFSO.GetFolder(strDirectory)msgbox strDirectory & " already created "elseSet objFolder = objFSO.CreateFolder(strDirectory)end if

5) Returning a collection of Disk Drives

Set oFSO = CreateObject("Scripting.FileSystemObject")Set colDrives = oFSO.DrivesFor Each oDrive in colDrivesMsgBox "Drive letter: " & oDrive.DriveLetterNext

6) Getting available space on a Disk Drive

Set oFSO = CreateObject("Scripting.FileSystemObject")Set oDrive = oFSO.GetDrive("C:")MsgBox "Available space: " & oDrive.AvailableSpace

7) Creating a Flat File

Set objFSO = CreateObject("Scripting.FileSystemObject")Set objFile = objFSO.CreateTextFile("E:\Gcreddy.txt")

8) Checking weather the File is available or not, if not creating the File

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strDirectory="E:\"strFile="Gcreddy.txt"Set objFSO = CreateObject("Scripting.FileSystemObject")If objFSO.FileExists(strDirectory & strFile) ThenSet objFolder = objFSO.GetFolder(strDirectory)ElseSet objFile = objFSO.CreateTextFile("E:\Gcreddy.txt")End if

9) Reading Data character by character from a Flat File

Set objFSO = CreateObject("Scripting.FileSystemObject")Set objFile = objFSO.OpenTextFile("E:\Gcreddy.txt", 1)Do Until objFile.AtEndOfStreamstrCharacters = objFile.Read(1)msgbox strCharactersLoop

10) Reading Data line by line from a Flat File

Set objFSO = CreateObject("Scripting.FileSystemObject")Set objFile = objFSO.OpenTextFile("E:\Gcreddy.txt", 1)Do Until objFile.AtEndOfStreamstrCharacters = objFile.Readlinemsgbox strCharactersLoop

11) Reading data from a flat file and using in data driven testing

Dim fso,myfileSet fso=createobject("scripting.filesystemobject")Set myfile= fso.opentextfile ("F:\Gcreddy.txt",1)myfile.skiplineWhile myfile.atendofline <> True x=myfile.readlines=split (x, ",")

SystemUtil.Run "C:\Program Files\Mercury Interactive\QuickTest Professional\samples\flight\app\flight4a.exe","","C:\Program Files\Mercury Interactive\QuickTest Professional\samples\flight\app\","open"Dialog("Login").ActivateDialog("Login").WinEdit("Agent Name:").Set s(0)Dialog("Login").WinEdit("Password:").SetSecure s(1)Dialog("Login").WinButton("OK").ClickWindow("Flight Reservation").CloseWend

12) Writing data to a text file

Dim Stuff, myFSO, WriteStuff, dateStampdateStamp = Date()Stuff = "I am Preparing this script: " &dateStampSet myFSO = CreateObject("Scripting.FileSystemObject")Set WriteStuff = myFSO.OpenTextFile("e:\Gcreddy.txt", 8, True)

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WriteStuff.WriteLine(Stuff)WriteStuff.CloseSET WriteStuff = NOTHINGSET myFSO = NOTHING

13) Delete a text file

Set objFSO=createobject("Scripting.filesystemobject")Set txtFilepath = objFSO.GetFile("E:\gcr.txt")txtFilepath.Delete()

14) Checking weather the File is available or not, if available delete the File

strDirectory="E:\"strFile="gcr.txt"Set objFSO = CreateObject("Scripting.FileSystemObject")If objFSO.FileExists(strDirectory & strFile) ThenSet objFile = objFSO.Getfile(strDirectory & strFile)objFile.delete ()End if

15) Comparing two text files

Dim f1, f2f1="e:\Gcreddy1.txt"f2="e:\Gcreddy2.txt"Public Function CompareFiles (FilePath1, FilePath2)Dim FS, File1, File2Set FS = CreateObject("Scripting.FileSystemObject") If FS.GetFile(FilePath1).Size <> FS.GetFile(FilePath2).Size ThenCompareFiles = TrueExit FunctionEnd IfSet File1 = FS.GetFile(FilePath1).OpenAsTextStream(1, 0)Set File2 = FS.GetFile(FilePath2).OpenAsTextStream(1, 0)CompareFiles = FalseDo While File1.AtEndOfStream = FalseStr1 = File1.Read Str2 = File2.Read CompareFiles = StrComp(Str1, Str2, 0)If CompareFiles <> 0 ThenCompareFiles = TrueExit DoEnd IfLoopFile1.Close()File2.Close()End Function Call Comparefiles(f1,f2) If CompareFiles(f1, f2) = False ThenMsgBox "Files are identical."ElseMsgBox "Files are different."End If

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16) Counting the number of times a word appears in a file

sFileName="E:\gcr.txt"sString="gcreddy"Const FOR_READING = 1Dim oFso, oTxtFile, sReadTxt, oRegEx, oMatchesSet oFso = CreateObject("Scripting.FileSystemObject")Set oTxtFile = oFso.OpenTextFile(sFileName, FOR_READING)sReadTxt = oTxtFile.ReadAllSet oRegEx = New RegExpoRegEx.Pattern = sStringoRegEx.IgnoreCase = bIgnoreCaseoRegEx.Global = TrueSet oMatches = oRegEx.Execute(sReadTxt)MatchesFound = oMatches.CountSet oTxtFile = Nothing : Set oFso = Nothing : Set oRegEx = Nothingmsgbox MatchesFound

17) Read a CSV File Using Database Techniques

On Error Resume Next

Const adOpenStatic = 3Const adLockOptimistic = 3Const adCmdText = &H0001

Set objConnection = CreateObject("ADODB.Connection")Set objRecordSet = CreateObject("ADODB.Recordset")

strPathtoTextFile = "C:\Databases\"

objConnection.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _          "Data Source=" & strPathtoTextFile & ";" & _          "Extended Properties=""text;HDR=YES;FMT=Delimited"""

objRecordset.Open "SELECT * FROM PhoneList.csv", _          objConnection, adOpenStatic, adLockOptimistic, adCmdText

Do Until objRecordset.EOF    Wscript.Echo "Name: " & objRecordset.Fields.Item("Name")    Wscript.Echo "Department: " & _        objRecordset.Fields.Item("Department")    Wscript.Echo "Extension: " & objRecordset.Fields.Item("Extension")       objRecordset.MoveNextLoop

18) Read a Text File into an Array

Const ForReading = 1

Set objFSO = CreateObject("Scripting.FileSystemObject")Set objTextFile = objFSO.OpenTextFile _    ("e:\gcreddy.txt", ForReading)

Do Until objTextFile.AtEndOfStream

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    strNextLine = objTextFile.Readline    arrServiceList = Split(strNextLine , ",")    Wscript.Echo "Server name: " & arrServiceList(0)    For i = 1 to Ubound(arrServiceList)        Wscript.Echo "Service: " & arrServiceList(i)    NextLoop

QTP Training 6