Writing a Unicode String into file

[kenny]

Hello,
I am trying to read the contents of 01.bin (unicode) into a String, to
modify it and finally to write it back into an other file named 02.bin.

If the file really contains "a b c", then everything is replaced properly.
But the finally output looks like "ÿþb b c".
There is that prefix ÿþ. I assume that it is always printed when you work
with unicode files but I do not know how to get rid of it.

Private Sub Button1_Click(B yVal sender As System.Object, ByVal e As
System.EventArg s) Handles Button1.Click

Dim enc As System.Text.Enc oding = System.Text.Enc oding.Unicode

Dim a As String =
Microsoft.Visua lBasic.FileIO.F ileSystem.ReadA llText("01.bin" , enc)

Dim b As String = Replace(a, "abc", "bbc", 1, -1)

Microsoft.Visua lBasic.FileIO.F ileSystem.Write AllText("02.bin ", b,
False, enc)

End Sub

[Cor Ligthert [MVP]]

Kenny,

I think that you first have to decide in what code your outputfile should
be.

Some links,

General
http://www.microsoft.com/globaldev/r...ce/cphome.mspx

OS systems
http://www.microsoft.com/globaldev/r...ocversion.mspx

I hope this helps a little bit?

Cor

"kenny" <ke***@discussi ons.microsoft.c om> schreef in bericht
news:1F******** *************** ***********@mic rosoft.com...

Hello,
I am trying to read the contents of 01.bin (unicode) into a String, to
modify it and finally to write it back into an other file named 02.bin.

If the file really contains "a b c", then everything is replaced properly.
But the finally output looks like "ÿþb b c".
There is that prefix ÿþ. I assume that it is always printed when you work
with unicode files but I do not know how to get rid of it.

Private Sub Button1_Click(B yVal sender As System.Object, ByVal e As
System.EventArg s) Handles Button1.Click

Dim enc As System.Text.Enc oding = System.Text.Enc oding.Unicode

Dim a As String =
Microsoft.Visua lBasic.FileIO.F ileSystem.ReadA llText("01.bin" , enc)

Dim b As String = Replace(a, "abc", "bbc", 1, -1)

Microsoft.Visua lBasic.FileIO.F ileSystem.Write AllText("02.bin ", b,
False, enc)

End Sub

[Herfried K. Wagner [MVP]]

"kenny" <ke***@discussi ons.microsoft.c om> schrieb:

I am trying to read the contents of 01.bin (unicode) into a String, to
modify it and finally to write it back into an other file named 02.bin.

If the file really contains "a b c", then everything is replaced properly.
But the finally output looks like "ÿþb b c".
There is that prefix ÿþ. I assume that it is always printed when you work
with unicode files but I do not know how to get rid of it.

It's the UTF-BOM. 'Encoding.Unico de' is actually UTF-16. You can avoid
creating the BOM as follows:

\\\
Dim enc As Encoding = New UnicodeEncoding (True, False)
Dim sw As New StreamWriter(.. ., enc)
///

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

[kenny]

thank you! it works.

@Cor Ligthert:
i think it should be Unicode :)

"Herfried K. Wagner [MVP]" wrote:

It's the UTF-BOM. 'Encoding.Unico de' is actually UTF-16. You can avoid
creating the BOM as follows:

\\\
Dim enc As Encoding = New UnicodeEncoding (True, False)
Dim sw As New StreamWriter(.. ., enc)
///

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

[tommaso.gastaldi]

Do you (or others) know, by chance, if there is also a way to avoid
insertion of the Byte Order Mark (BOM), using the binary formatter? I
have alway been curious about that....

-tom

Herfried K. Wagner [MVP] ha scritto:

"kenny" <ke***@discussi ons.microsoft.c om> schrieb:

I am trying to read the contents of 01.bin (unicode) into a String, to
modify it and finally to write it back into an other file named 02.bin.

If the file really contains "a b c", then everything is replaced properly.
But the finally output looks like "ÿþb b c".
There is that prefix ÿþ. I assume that it is always printed when you work
with unicode files but I do not know how to get rid of it.

It's the UTF-BOM. 'Encoding.Unico de' is actually UTF-16. You can avoid
creating the BOM as follows:

\\\
Dim enc As Encoding = New UnicodeEncoding (True, False)
Dim sw As New StreamWriter(.. ., enc)
///

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>