Converting String To Float in C#

Question

I am converting a string like "41.00027357629127", and I am using;

Convert.ToSingle("41.00027357629127");

or

float.Parse("41.00027357629127");

These methods return 4.10002732E+15.

When I convert to float I want "41.00027357629127". This string should be the same...

Answer 1

Your thread's locale is set to one in which the decimal mark is "," instead of ".".

Try using this:

float.Parse("41.00027357629127", CultureInfo.InvariantCulture.NumberFormat);

Note, however, that a float cannot hold that many digits of precision. You would have to use double or Decimal to do so.

Answer 2

First, it is just a presentation of the float number you see in the debugger. The real value is approximately exact (as much as it's possible).

Note: Use always CultureInfo information when dealing with floating point numbers versus strings.

float.Parse("41.00027357629127",
      System.Globalization.CultureInfo.InvariantCulture);

This is just an example; choose an appropriate culture for your case.

Answer 3

You can use the following:

float asd = (float) Convert.ToDouble("41.00027357629127");

Answer 4

Use Convert.ToDouble("41.00027357629127");

Convert.ToDouble documentation

Answer 5

The precision of float is 7 digits. If you want to keep the whole lot, you need to use the double type that keeps 15-16 digits. Regarding formatting, look at a post about formatting doubles. And you need to worry about decimal separators in C#.