What's the default encoding for System.IO.File.ReadAllText

Question

if we don't mention the decoding what decoding will they use?

I do not think it's System.Text.Encoding.Default. Things work well if I EXPLICITLY put System.Text.Encoding.Default but things go wrong when I live that empty.

So this doesn't work well

Dim b = System.IO.File.ReadAllText("test.txt")
System.IO.File.WriteAllText("test4.txt", b)

but this works well

Dim b = System.IO.File.ReadAllText("test.txt", System.Text.Encoding.Default)
System.IO.File.WriteAllText("test4.txt", b, System.Text.Encoding.Default)

If we do not specify encoding will vb.net try to figure out the encoding from the text file?

Also what is System.Text.Encoding.Default?

It's the system default. What is my system default and how can I change it?

How do I know encoding used in a text file?

If I create a new text file and open it with scite I see that the encoding is code page property. What is code page property?

score 4 · Answer 1 · answered Jul 26 '11 at 05:31

4

Look here, "This method attempts to automatically detect the encoding of a file based on the presence of byte order marks. Encoding formats UTF-8 and UTF-32 (both big-endian and little-endian) can be detected."

answered Jul 26 '11 at 05:31

TBohnen.jnr

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1

is this the same with encoding.default? – Anonymous White Jul 26 '11 at 08:14
2

Nope, this uses the operating system's current ansi code page Have a look here: http://msdn.microsoft.com/en-us/library/system.text.encoding.default.aspx – TBohnen.jnr Jul 26 '11 at 08:36
Default seems to be old and not really used anymore/viable. Have a look at http://en.wikipedia.org/wiki/Windows_code_page – TBohnen.jnr Jul 26 '11 at 08:38

score 3 · Answer 2 · answered Nov 24 '13 at 08:48

3

see also http://msdn.microsoft.com/en-us/library/ms143375(v=vs.110).aspx This method uses UTF-8 encoding without a Byte-Order Mark (BOM)

answered Nov 24 '13 at 08:48

IlPADlI

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What's the default encoding for System.IO.File.ReadAllText

2 Answers2