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]])
The iomode argument 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:
[JScript] function TextStreamTest( ) { var fso, f, ts, s; var ForReading = 1, ForWriting = 2, ForAppending = 8; var TristateUseDefault = -2, TristateTrue = -1, TristateFalse = 0; fso = new ActiveXObject("Scripting.FileSystemObject"); fso.CreateTextFile( "test1.txt" ); // Create a file. f = fso.GetFile("test1.txt"); ts =f.OpenAsTextStream(
ForWriting,
TristateUseDefault)
; ts.Write( "Hello World" ); ts.Close( ); ts =f.OpenAsTextStream(
ForReading,
TristateUseDefault)
; s = ts.ReadLine( ); ts.Close( ); return(s); } [VBScript] Function TextStreamTest Const ForReading = 1, ForWriting = 2, ForAppending = 8 Const TristateUseDefault = -2, TristateTrue = -1, TristateFalse = 0 Dim fso, f, ts Set fso = CreateObject("Scripting.FileSystemObject") fso.CreateTextFile "test1.txt" ' Create a file. Set f = fso.GetFile("test1.txt") Set ts =f.OpenAsTextStream(
ForWriting,
TristateUseDefault)
ts.Write "Hello World" ts.Close Set ts =f.OpenAsTextStream(
ForReading,
TristateUseDefault)
TextStreamTest = ts.ReadLine ts.Close End Function
file: /Techref/language/asp/VBS/VBSCRIPT/jsmthopenastextstream.htm, 4KB, , updated: 2005/8/9 12:38, local time: 2024/12/25 09:36,
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