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Opens a specified file and returns a TextStream object that can be used to read from, write to, or append to the file.
object.OpenAsTextStream([iomode, [format]])
object
The name of a File object. Required.
iomode
Indicates input/output mode. Can be one of three constants: ForReading, ForWriting, or ForAppending. Optional.
format
One of three Tristate values used to indicate the format of the opened file. If omitted, the file is opened as ASCII. Optional.
The iomode arguments can have any 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. If a file with the same name exists, its previous contents are overwritten. |
|
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. |
The OpenAsTextStream method provides the same functionality as the OpenTextFile method of the FileSystemObject. In addition, the OpenAsTextStream method can be used to write to a file.
The following code illustrates the use of the OpenAsTextStream method:
Sub TextStreamTest
Const ForReading = 1, ForWriting = 2, ForAppending = 3
Const TristateUseDefault = -2, TristateTrue = -1, TristateFalse = 0
Dim fs, f, ts, s
Set fs = CreateObject("Scripting.FileSystemObject")
fs.CreateTextFile "test1.txt"
'Create a file
Set f = fs.GetFile("test1.txt")
Set ts = f.OpenAsTextStream(ForWriting, TristateUseDefault)
ts.Write "Hello World"
ts.Close
Set ts = f.OpenAsTextStream(ForReading, TristateUseDefault)
s = ts.ReadLine
Response.Write s
ts.Close
End Sub
Copyright 2002 Sun Microsystems, Inc. All rights reserved. Legal Notice.