How to convert utf8 string to utf8 byte array?

Question

How can I convert string to utf8 byte array, I have this sample code:

This works ok:

StreamWriter file = new StreamWriter(file1, false, Encoding.UTF8);
file.WriteLine(utf8string);
file.Close();

This works wrong, file is in ASCII:

byte[] bytes = System.Text.UTF8Encoding.UTF8.GetBytes(utf8string);
FileStream fs = new FileStream(file2, FileMode.CreateNew);
fs.Write(bytes, 0, bytes.Length);
fs.Close();

I would like to get byte array what returned by this function:

System.IO.File.ReadAllBytes(path_to_file)

because this works ok:

byte[] datab = File.ReadAllBytes(file1);
FileStream fs2 = new FileStream(file3, FileMode.CreateNew);
fs2.Write(datab, 0, datab.Length);
fs2.Close();

Very similar question just asked: stackoverflow.com/questions/11539559/… — Davin Tryon
– Davin Tryon, Commented Jul 18, 2012 at 10:51
Does this not answer your question byte[] bytes = System.Text.UTF8Encoding.UTF8.GetBytes(utf8string);? — Chris Moutray
– Chris Moutray, Commented Jul 18, 2012 at 15:34

nixda · Accepted Answer · 2016-11-16 23:22:28Z

91

Can use other option again:

string value = "\u00C4 \uD802\u0033 \u00AE";    
byte[] bytes= System.Text.Encoding.UTF8.GetBytes(value);

For more information can look on Encoding.UTF8 Property

edited Nov 16, 2016 at 23:22

nixda

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answered Jul 18, 2012 at 10:55

Tigran

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2 Comments

André Puel Over a year ago

Does the resulting byte array contain a trailing NULL character?

David A. Gray Over a year ago

Only if the input array has one. It's a one-for-one copy.

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