Question

For example I have several decimals:

decimal[] arr = { 1, (decimal)1.1, (decimal)1.00 };

they represent price in russian rubles:

var overrideCulture = new System.Globalization.CultureInfo("ru-RU");

when I use:

foreach (var d in arr)
{
     string s = d.ToString("c", overrideCulture);
     Console.WriteLine(s);
}

I get

1,00p.
1,10p.
1,00p.

as result, but what I need is, if fraction is zero, I don’t want it to be displayed but I need to keep currency format. in this example I want to get:

1p.
1,10p.
1p.

I can simply get of fractions like:

foreach (var d in arr)
{
     string s = d.ToString("#.##", overrideCulture);
     Console.WriteLine(s);
}

but currency format will be lost.

string s = d.ToString("#.##c", overrideCulture);

also does’n work, I get 1c or 1,1c

Is there some NOT tricky way to get such formatting like I need?

Answer 1

I don’t know of a single format string that will do that but one way would be:

string format = (d == Math.Round(d,0)) ? "c0" : "c";
string s = d.ToString(format, overrideCulture);

if d may have more than 2 decimal places and you want to not show decimals for any value that would round to .00 try

string format = (Math.Round(d,2) == Math.Round(d,0)) ? "c0" : "c";
string s = d.ToString(format, overrideCulture);

As a side note you can avoid a cast be defining the constants as decimal literals:

decimal[] arr = { 1m, 1.1m, 1.00m };