How to parse from String to Float in C#?

Question

This issue should be very simple but I can't find the way to make it work. I have the following code:

string yeah = "0.5";
float yeahFloat = float.Parse(yeah);
MessageBox.Show(yeahFloat.ToString());

But the MessageBox shows "5" instead of "0.5". How can I resolve this using float?

I hope it helps http://stackoverflow.com/questions/5365566/parse-string-to-float-number-c-sharp — KopBuH, Apr 17 '13 at 13:43
@Tonix Because probably you are not use the same Culture with Barbara. — Soner Gönül, Apr 17 '13 at 13:46

score 6 · Answer 1 · answered Apr 17 '13 at 13:43

6

float yeahFloat = float.Parse(yeah, CultureInfo.InvariantCulture);

See documentation: http://msdn.microsoft.com/en-us/library/bh4863by.aspx

answered Apr 17 '13 at 13:43

tnw

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score 3 · Accepted Answer · edited May 23 '17 at 12:28

0.5 is the way some country are writing decimal number, like in America. In France, decimal number are more written with a comma : 0,5.
Typically, the code you give throw an exception on my computer.

You need to specify from what culture you are expected the string to be parse. If not, it will take your computer culture setting, which is bad, since your code could run in different countries.

So, by specifying an invariant culture, you said to the Parse function : ok, let's try to parse point or comma, try as hard as you can:

string yeah = "0.5";
float yeahFloat = float.Parse(yeah, CultureInfo.InvariantCulture);
Console.Write(yeahFloat);

There is a lot of question already on this subject :

score 1 · Answer 3 · answered Apr 17 '13 at 13:43

1

By default, Single.Parse(String) parses based on your localization settings. If you want to use a specific one, you'll have to use an appropriate overload of that method with the culture settings that you want.

answered Apr 17 '13 at 13:43

Theodoros Chatzigiannakis

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score 1 · Answer 4 · answered Apr 17 '13 at 13:45

You can try this with float.TryParse() :

string yeah = "0.5";
float yeahFloat;
 if (float.TryParse(yeah,System.Globalization.NumberStyles.Any,
     System.Globalization.CultureInfo.InvariantCulture,out yeahFloat))
   {
     MessageBox.Show(yeahFloat.ToString());    
   }

score 0 · Answer 5 · answered Apr 17 '13 at 13:45

0

Try passing the formatting you require in the ToString() method

MessageBox.Show(yeahFloat.ToString("0.0")); // 1 decimal place

answered Apr 17 '13 at 13:45

MattP

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How to parse from String to Float in C#?

5 Answers5