OpenAsTextStream Method

Статья
10/24/2011

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]])

Arguments

object
Required. Always the name of a File object.
iomode
Optional. Indicates input/output mode. Can be one of three constants: ForReading, ForWriting, or ForAppending.
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 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.

Remarks

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:

Const ForReading = 1, ForWriting = 2, ForAppending = 8
Const TristateUseDefault = -2, TristateTrue = -1, TristateFalse = 0
Dim fso, ts, fileObj, TextLine

Set fso = CreateObject("Scripting.FileSystemObject")

' Create the file, and obtain a file object for the file.
FileName = "c:\testfile.txt"
fso.CreateTextFile FileName
Set fileObj = fso.GetFile(FileName)

' Open a text stream for output.
Set ts = fileObj.OpenAsTextStream(ForWriting, TristateUseDefault)

' Write to the text stream.
ts.WriteLine "Hello World!"
ts.WriteLine "The quick brown fox"
ts.Close

' Open a text stream for input.
Set ts = fileObj.OpenAsTextStream(ForReading, TristateUseDefault)

' Read from the text stream and display the results.
Do While ts.AtEndOfStream <> True
    TextLine = ts.ReadLine
    Document.Write TextLine & "<br />"
Loop

ts.Close

Applies To:

File Object

Change History

Date	History	Reason
April 2009	Modified examples.	Information enhancement.

April 2009

Modified examples.

Information enhancement.

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