Required. String expression that identifies the file to open.
iomode
Optional. Indicates input/output mode. Can be one of three constants: ForReading, ForWriting, or ForAppending.
create
Optional. Boolean value that indicates whether a new file can be created if the specified filename doesn't exist. The value is True if a new file is created; False if it isn't created. The default is False.
format
Optional. One of three Tristate values used to indicate the format of the opened file. If omitted, the file is opened as ASCII.
Settings
The iomode argument can have either of the following settings:
Constant Value Description
ForReading 1 Open a file for reading only. You can't write to this file.
ForWriting 2 Open a file for writing only. You can't read from this file.
ForAppending 8 Open a file and write to the end of the file.
The format argument can have any of the following settings:
Constant Value Description
TristateUseDefault -2 Opens the file using the system default.
TristateTrue -1 Opens the file as Unicode.
TristateFalse 0 Opens the file as ASCII.
Remarks
The following code illustrates the use of the OpenTextFile method to open a file for writing text:
Sub OpenTextFileTest
Const ForReading = 1, ForWriting = 2, ForAppending = 8
Dim fso, f
Set fso = CreateObject("Scripting.FileSystemObject")
Set f = fso.OpenTextFile("c:\testfile.txt", ForWriting, True)
f.Write "Hello world!"
f.Close
End Sub
这里:
ForAppending 8 Open a file and write to the end of the file.
Sub ReadFiles
Dim fso, f1, ts, s
Const ForReading = 1
set fso=server.CreateObject("scripting.filesystemobject")
Set f1 = fso.CreateTextFile("c:\testfile.txt", True)
' 写一行,并且带有新行字符。
f1.WriteLine("Testing 1, 2, 3.")
' 向文件写三个新行字符。
f1.WriteBlankLines(4)
f1.writetab(1)
' 写一行。
f1.Write ("This is a test.")
' 读取文件的内容。
Response.Write "Reading file <br>"
Set ts = fso.OpenTextFile("c:\testfile.txt", ForReading)
s = ts.ReadLine
Response.Write "File contents = '" & s & "'"
ts.Close
End Sub