Convert ".1", ".2" to double

Question

I want to convert string like ".1", ".2", etc into 0.1, 0.2 etc.

I tried:

Convert.ToDouble(".1")

and it crashes. I understand why it crashes, but I still need to convert it to valid double number. I know I can do this with splitting string and parsing but is there a better way?

It doesn't "crash", it throws an exception. Is your locale one that uses a comma for a decimal separator? — CodeCaster, Feb 11 '16 at 08:40
It doesn't even do that, [dotnetfiddle](https://dotnetfiddle.net/hnDW6c), what error do you get? this works for me — Sayse, Feb 11 '16 at 08:41
You can use the `ToDouble`-method that accepts an instance of `IFormatProvider` to provide a custom format. — MakePeaceGreatAgain, Feb 11 '16 at 08:42
Check this : http://stackoverflow.com/questions/11399439/converting-string-to-double-in-c-sharp — Maverick, Feb 11 '16 at 08:42

Soner Gönül · Accepted Answer · 2016-02-11T08:50:07.313

Convert.ToDouble uses current culture settings by default.

Probably your current culture has different string than . as a NumberDecimalSeparator.

As a solution, you can use a culture that already has . as a NumberDecimalSeparator like InvariantCulture, or your can Clone your CurrentCulture, set it's NumberDecimalSeparator to . and use that cloned culture in your Convert.ToDouble method (or double.Parse) as a second parameter.

var d = double.Parse(".1", CultureInfo.InvariantCulture);

or

var clone = (CultureInfo)CultureInfo.CurrentCulture.Clone();
clone.NumberFormat.NumberDecimalSeparator = ".";
var d = double.Parse(".1", clone);

Also gets me every time... – Mario The Spoon Feb 11 '16 at 08:42 — Mario The Spoon, Feb 11 '16 at 08:42

score 4 · Answer 2 · answered Feb 11 '16 at 08:42

4

Try this:

  Double result = Double.Parse(".1", CultureInfo.InvariantCulture);

by specifing CultureInfo.InvariantCulture you ensure . to be a decimal separator.

answered Feb 11 '16 at 08:42

Dmitry Bychenko

165,109
17
150
199

Convert ".1", ".2" to double

2 Answers2