c# Decimal to string for currency

Question

To display a currency we do:

ToString("0.##")

For value 5.00 the output is:

5

For value 5.98 the output is:

5.98

For value 5.90 the output is:

5.9

I need the third case to come out with 2 decimal points, eg:

5.90

How can I do this without it affecting the other results?

Answer 1

I know this doesn't give you a format that fixes the problem, but it's a simple solution to work around it.

(5.00).ToString("0.00").Replace(".00","");  // returns 5
(5.90).ToString("0.00").Replace(".00", ""); // returns 5.90
(5.99).ToString("0.00").Replace(".00", ""); // returns 5.99

Answer 2

Try:

s.ToString("#,##0.00")

Or just:

s.ToString("C")

I know of no built-in way to expand out all two decimal places only when both are not zero. Would probably just use an if statement for that.

int len = s.Length;
if (s[len - 2] == '0' && s[len - 1] == '0')
    s = s.Left(len - 3);

Answer 3

You could use an extension method, something like this:

public static string ToCurrencyString(this decimal d)
{
    decimal t = Decimal.Truncate(d);
    return d.Equals(t) ? d.ToString("0.##") : d.ToString("#, ##0.00")
}

Answer 4

# means if there is no number leave it empty 0 means put a 0 if there is no number

ToString("0.00")

Answer 5

Not sure if I'm missing something, but can't you just do this:

decimal moneyvalue = 1921.39m;
string html = String.Format("Order Total: {0:C}", moneyvalue);
Console.WriteLine(html);

Answer 6

Just use myDecimal.ToString("N") ,

With "N" parameter will transform decimal to string, and the number of decimals to show will be defined by your SO settings.

https://msdn.microsoft.com/en-us/library/system.globalization.numberformatinfo.numberdecimaldigits(v=vs.110).aspx