Converting String To Float in C#

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You can double.Parse("41.00027357629127");

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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#.

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Use Convert.ToDouble("41.00027357629127");

Convert.ToDouble documentation

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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.

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You can use parsing with double instead of float to get more precision value.

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最佳答案

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.

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You can use the following:

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

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First you need to using System.Globalization to dealing convertions from string to float/double/decimal without problem.

Then you can call Parse on float(or double/decimal depending at the accuracy you need), and as argument in Parse you need your string (you can store it in a variable if you want) and CultureInfo.InvariantCulture.NumberFormat

So, as previous users already explained:

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

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A 2022 way of converting an string that represents a float value:

(float)Convert.ToDecimal(value, CultureInfo.GetCultureInfo("en-US"));

where you also can choose what kind of float are you expecting to convert, because some CultureInfo instances represents decimal values with a , and others with ..

If you need more decimals to obtain more precision, just not use float

Convert.ToDecimal(value, CultureInfo.GetCultureInfo("en-US"));