How do I convert from unicode to single byte in C#?

Question

This does not work:

int level =1;
string argument;
// and then argument is assigned

if (argument[2] == Convert.ToChar(level))
{
    // does not work
}

And this:

char test1 = argument[2];
char test2 = Convert.ToChar(level);

produces funky results. test1 can be: 49 '1' while test2 will be 1 ''

http://stackoverflow.com/questions/138449/how-to-convert-a-unicode-character-to-its-ascii-equivalent — Robert Harvey, Apr 12 '10 at 20:21
Do you want `level` to be converted to the char '1' , or a char with value 1 ? That's the same difference as in doing `char c = '1'` and `char c = 1` — leeeroy, Apr 12 '10 at 20:23

score 3 · Answer 1 · answered Apr 12 '10 at 20:52

How do I convert from unicode to single byte in C#?

This question makes no sense, and the sample code just makes things worse.

Unicode is a mapping from characters to code points. The code points are numbered from 0x0 to 0x10FFFF, which is far more values than can be stored in a single byte.

And the sample code has an int, a string, and a char. There are no bytes anywhere.

What are you really trying to do?

score 2 · Accepted Answer · answered Apr 12 '10 at 20:21

2

Use UnicodeEncoding.GetBytes().

UnicodeEncoding unicode = new UnicodeEncoding();
Byte[] encodedBytes = unicode.GetBytes(unicodeString);

answered Apr 12 '10 at 20:21

David

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score 1 · Answer 3 · answered Apr 12 '10 at 20:19

1

char and string are always Unicode in .NET. You can't do it the way you're trying.

In fact, what are you trying to accomplish?

answered Apr 12 '10 at 20:19

John Saunders

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Henk Holterman · Answer 4 · 2010-04-12T20:30:44.283

1

If you want to test whether the int level matches the char argument[2] then use

  if (argument[2] == Convert.ToChar(level + (int)'0'))

edited Apr 12 '10 at 20:30

answered Apr 12 '10 at 20:21

Henk Holterman

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How do I convert from unicode to single byte in C#?

4 Answers4