Are you sure this takes into account the current system locale, i.e. displaying , when it should and . when it should?
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Converting an integer to a string with thousand separators
Let's say I have the integer (or better yet, long) 1000000. How can I convert it properly to a string with thousand separators?
On systems where comma is the thousand separator the outcome should be "1,000,000" and on systems where dot is the thousand separator the outcome should be "1.000.000".
I have tried doing String.Format("{0:n}", 1000000); but this just keeps giving me "1.000.000,00" which is not what I want (I don't want the decimal point there at the end, because I am dealing with integers and not doubles).
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Answers
Yes, it takes system locale into account. As for an explanation why it works like this... It's custom number formatting. A quick google turns up this page:
http://blog.stevex.net/ind
Have a look at the chapter 'Numbers', specifically 'Custom number formatting'.
I still find this a mystery. That SteveX guy has a nice website there, but he still leaves me in the dark. For instance, why does the format string "#,0" also seem to work fine in this case? I guess I know theoretically from that website what # represents, what "," represents and what 0 represents, but I don't know how to put all them together and understand the result.
I have increased the points of this question to 300.
will be easier to use "N"
long x = 123456789;
string s = x.ToString("N");
or
string s = string.Format("{0:N}", x);
also, you can put specific culture information:
s = x.ToString("N", CultureInfo.InvariantCultu
s = x.ToString("N", CultureInfo.CreateSpecific
also you can specify decimals, as:
s = x.ToString("N2"); // will show 2 decimal digits
I found the "N" solution to be the simplest to understand. In my case therefore I ended up using simply "N0" (N zero). So thanks for this advice and all the other advices.
Just out of curiosity though, what comments were said that were deleted? I didn't get a chance to see them before they got removed.
dedekind,
You asked "For instance, why does the format string "#,0" also seem to work fine in this case?"
The answer is in the documentation.
http://msdn.microsoft.com/
The ',' character serves as both a thousand separator specifier and a number scaling specifier.
Thousand separator specifier: If one or more ',' characters is specified between two digit placeholders (0 or #) that format the integral digits of a number, a group separator character is inserted between each number group in the integral part of the output.
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by: NeoTeqPosted on 2008-06-20 at 10:10:45ID: 21833065
This does what you are looking for.
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