How do I get the output of this to read 0 instead of 00 when the value is 0?
String.Format("{0:0,0}", myDouble);
4 Answers
string.Format("{0:#,0}", myDouble);
(tested version)
4 Comments
Matthew Flaschen
This will an empty string for 0.
Dan Dumitru
Well, it took me some time before I fired up Visual Studio, but now I did test it.
Matthew Flaschen
I find Mono's C# REPL comes in handy for quick testing like this.
Dan Dumitru
@Matthew - Well, if I'd go that way, I'd might as well use a text file and the command prompt, as Jon Skeet says he does :) But otherwise it seems as an interesting app, thanks for the link.
String.Format("{0:#,0}", myDouble);
answered Sep 12, 2010 at 20:34
Matthew Flaschen
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1 Comment
Dan Dumitru
Yes, indeed. To my defense, I can say that I first checked in Visual Studio, and then when I came back to correct my answer I saw Matthew had posted his, but hmm, who would believe me...
Another alternative is to use this:
string s = string.Format("{0:n0}", myDouble);
If you always want commas as the thousands separator and not to use the user's locale then use this instead:
string s = myDouble.ToString("n0", CultureInfo.InvariantCulture);
Comments
While the posted answers here ("{0:#,0}") are correct I would strongly suggest using a more readable picture (also to avoid confusion about decimal/thousand separators):
string.Format("{0:#,##0}", v); // to print 1,234
string.Format("{0:#,##0.00}", v); // to print 1,234.56
But all those pictures work the same, including 2 comma's for 1e6 etc.
,) or do you want a decimal point?